/*! js-yaml 5.4.1 https://github.com/nodeca/js-yaml @license MIT */
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
//#region src/tag.ts
/**
* Returned by a scalar resolver when the source does not match its tag.
*
* @category Tags
*/
var NOT_RESOLVED = Symbol("NOT_RESOLVED");
/**
* Create a normalized scalar tag definition.
*
* @category Tags
*/
function defineScalarTag(tagName, options) {
	var _options$implicit, _options$matchByTagPr, _options$implicitFirs, _options$represent, _options$representTag;
	return {
		tagName,
		nodeKind: "scalar",
		implicit: (_options$implicit = options.implicit) !== null && _options$implicit !== void 0 ? _options$implicit : false,
		matchByTagPrefix: (_options$matchByTagPr = options.matchByTagPrefix) !== null && _options$matchByTagPr !== void 0 ? _options$matchByTagPr : false,
		implicitFirstChars: (_options$implicitFirs = options.implicitFirstChars) !== null && _options$implicitFirs !== void 0 ? _options$implicitFirs : null,
		resolve: options.resolve,
		identify: options.identify,
		represent: (_options$represent = options.represent) !== null && _options$represent !== void 0 ? _options$represent : ((data) => String(data)),
		representTagName: (_options$representTag = options.representTagName) !== null && _options$representTag !== void 0 ? _options$representTag : (() => tagName)
	};
}
/**
* Create a normalized sequence tag definition.
*
* @category Tags
*/
function defineSequenceTag(tagName, options) {
	var _options$matchByTagPr2, _options$finalize, _options$represent2, _options$representTag2;
	const carrierIsResult = options.finalize === void 0;
	return {
		tagName,
		nodeKind: "sequence",
		implicit: false,
		matchByTagPrefix: (_options$matchByTagPr2 = options.matchByTagPrefix) !== null && _options$matchByTagPr2 !== void 0 ? _options$matchByTagPr2 : false,
		create: options.create,
		addItem: options.addItem,
		finalize: (_options$finalize = options.finalize) !== null && _options$finalize !== void 0 ? _options$finalize : ((carrier) => carrier),
		carrierIsResult,
		identify: options.identify,
		represent: (_options$represent2 = options.represent) !== null && _options$represent2 !== void 0 ? _options$represent2 : ((data) => data),
		representTagName: (_options$representTag2 = options.representTagName) !== null && _options$representTag2 !== void 0 ? _options$representTag2 : (() => tagName)
	};
}
/**
* Create a normalized mapping tag definition.
*
* @category Tags
*/
function defineMappingTag(tagName, options) {
	var _options$matchByTagPr3, _options$finalize2, _options$represent3, _options$representTag3;
	const carrierIsResult = options.finalize === void 0;
	return {
		tagName,
		nodeKind: "mapping",
		implicit: false,
		matchByTagPrefix: (_options$matchByTagPr3 = options.matchByTagPrefix) !== null && _options$matchByTagPr3 !== void 0 ? _options$matchByTagPr3 : false,
		create: options.create,
		addPair: options.addPair,
		has: options.has,
		keys: options.keys,
		get: options.get,
		finalize: (_options$finalize2 = options.finalize) !== null && _options$finalize2 !== void 0 ? _options$finalize2 : ((carrier) => carrier),
		carrierIsResult,
		identify: options.identify,
		represent: (_options$represent3 = options.represent) !== null && _options$represent3 !== void 0 ? _options$represent3 : ((data) => data),
		representTagName: (_options$representTag3 = options.representTagName) !== null && _options$representTag3 !== void 0 ? _options$representTag3 : (() => tagName)
	};
}
//#endregion
//#region src/tag/scalar/str.ts
/** @category Tags */
var strTag = defineScalarTag("tag:yaml.org,2002:str", {
	resolve: (source) => source,
	identify: (data) => typeof data === "string"
});
//#endregion
//#region src/tag/scalar/null_core.ts
var NULL_VALUES$1 = [
	"",
	"~",
	"null",
	"Null",
	"NULL"
];
/** @category Tags */
var nullCoreTag = defineScalarTag("tag:yaml.org,2002:null", {
	implicit: true,
	implicitFirstChars: [
		"",
		"~",
		"n",
		"N"
	],
	resolve: (source) => {
		if (NULL_VALUES$1.indexOf(source) !== -1) return null;
		return NOT_RESOLVED;
	},
	identify: (object) => object === null,
	represent: () => "null"
});
//#endregion
//#region src/tag/scalar/null_json.ts
/** @category Tags */
var nullJsonTag = defineScalarTag("tag:yaml.org,2002:null", {
	implicit: true,
	implicitFirstChars: ["n"],
	resolve: (source, isExplicit) => {
		if (source === "null" || isExplicit && source === "") return null;
		return NOT_RESOLVED;
	},
	identify: (object) => object === null,
	represent: () => "null"
});
//#endregion
//#region src/tag/scalar/null_yaml11.ts
var NULL_VALUES = [
	"",
	"~",
	"null",
	"Null",
	"NULL"
];
/** @category Tags */
var nullYaml11Tag = defineScalarTag("tag:yaml.org,2002:null", {
	implicit: true,
	implicitFirstChars: [
		"",
		"~",
		"n",
		"N"
	],
	resolve: (source) => {
		if (NULL_VALUES.indexOf(source) !== -1) return null;
		return NOT_RESOLVED;
	},
	identify: (object) => object === null,
	represent: () => "null"
});
//#endregion
//#region src/tag/scalar/bool_core.ts
var TRUE_VALUES$2 = [
	"true",
	"True",
	"TRUE"
];
var FALSE_VALUES$2 = [
	"false",
	"False",
	"FALSE"
];
/** @category Tags */
var boolCoreTag = defineScalarTag("tag:yaml.org,2002:bool", {
	implicit: true,
	implicitFirstChars: [
		"t",
		"T",
		"f",
		"F"
	],
	resolve: (source) => {
		if (TRUE_VALUES$2.indexOf(source) !== -1) return true;
		if (FALSE_VALUES$2.indexOf(source) !== -1) return false;
		return NOT_RESOLVED;
	},
	identify: (object) => Object.prototype.toString.call(object) === "[object Boolean]",
	represent: (object) => object ? "true" : "false"
});
//#endregion
//#region src/tag/scalar/bool_json.ts
var TRUE_VALUES$1 = ["true"];
var FALSE_VALUES$1 = ["false"];
/** @category Tags */
var boolJsonTag = defineScalarTag("tag:yaml.org,2002:bool", {
	implicit: true,
	implicitFirstChars: ["t", "f"],
	resolve: (source) => {
		if (TRUE_VALUES$1.indexOf(source) !== -1) return true;
		if (FALSE_VALUES$1.indexOf(source) !== -1) return false;
		return NOT_RESOLVED;
	},
	identify: (object) => Object.prototype.toString.call(object) === "[object Boolean]",
	represent: (object) => object ? "true" : "false"
});
//#endregion
//#region src/tag/scalar/bool_yaml11.ts
var TRUE_VALUES = [
	"true",
	"True",
	"TRUE",
	"y",
	"Y",
	"yes",
	"Yes",
	"YES",
	"on",
	"On",
	"ON"
];
var FALSE_VALUES = [
	"false",
	"False",
	"FALSE",
	"n",
	"N",
	"no",
	"No",
	"NO",
	"off",
	"Off",
	"OFF"
];
/** @category Tags */
var boolYaml11Tag = defineScalarTag("tag:yaml.org,2002:bool", {
	implicit: true,
	implicitFirstChars: [
		"y",
		"Y",
		"n",
		"N",
		"t",
		"T",
		"f",
		"F",
		"o",
		"O"
	],
	resolve: (source) => {
		if (TRUE_VALUES.indexOf(source) !== -1) return true;
		if (FALSE_VALUES.indexOf(source) !== -1) return false;
		return NOT_RESOLVED;
	},
	identify: (object) => Object.prototype.toString.call(object) === "[object Boolean]",
	represent: (object) => object ? "true" : "false"
});
//#endregion
//#region src/tag/scalar/int_core.ts
var YAML_INTEGER_IMPLICIT_PATTERN$1 = /* @__PURE__ */ new RegExp("^(?:0o[0-7]+|0x[0-9a-fA-F]+|[-+]?[0-9]+)$");
var YAML_INTEGER_EXPLICIT_PATTERN$1 = /* @__PURE__ */ new RegExp("^(?:[-+]?0b[0-1]+|[-+]?0o[0-7]+|[-+]?0x[0-9a-fA-F]+|[-+]?[0-9]+)$");
function parseYamlInteger$2(source) {
	let value = source;
	let sign = 1;
	if (value[0] === "-" || value[0] === "+") {
		if (value[0] === "-") sign = -1;
		value = value.slice(1);
	}
	if (value.startsWith("0b")) return sign * parseInt(value.slice(2), 2);
	if (value.startsWith("0o")) return sign * parseInt(value.slice(2), 8);
	if (value.startsWith("0x")) return sign * parseInt(value.slice(2), 16);
	return sign * parseInt(value, 10);
}
function resolveYamlInteger$2(source, isExplicit) {
	if (isExplicit) {
		if (!YAML_INTEGER_EXPLICIT_PATTERN$1.test(source)) return NOT_RESOLVED;
	} else if (!YAML_INTEGER_IMPLICIT_PATTERN$1.test(source)) return NOT_RESOLVED;
	const result = parseYamlInteger$2(source);
	return Number.isFinite(result) ? result : NOT_RESOLVED;
}
/** @category Tags */
var intCoreTag = defineScalarTag("tag:yaml.org,2002:int", {
	implicit: true,
	implicitFirstChars: [
		"-",
		"+",
		..."0123456789"
	],
	resolve: resolveYamlInteger$2,
	identify: (object) => Number.isInteger(object) && !Object.is(object, -0) && object.toString(10).indexOf("e") < 0,
	represent: (object) => object.toString(10)
});
//#endregion
//#region src/tag/scalar/int_json.ts
var YAML_INTEGER_IMPLICIT_PATTERN = /* @__PURE__ */ new RegExp("^-?(?:0|[1-9][0-9]*)$");
var YAML_INTEGER_EXPLICIT_PATTERN = /* @__PURE__ */ new RegExp("^(?:[-+]?0b[0-1]+|[-+]?0o[0-7]+|[-+]?0x[0-9a-fA-F]+|[-+]?[0-9]+)$");
function parseYamlInteger$1(source) {
	let value = source;
	let sign = 1;
	if (value[0] === "-" || value[0] === "+") {
		if (value[0] === "-") sign = -1;
		value = value.slice(1);
	}
	if (value.startsWith("0b")) return sign * parseInt(value.slice(2), 2);
	if (value.startsWith("0o")) return sign * parseInt(value.slice(2), 8);
	if (value.startsWith("0x")) return sign * parseInt(value.slice(2), 16);
	return sign * parseInt(value, 10);
}
function resolveYamlInteger$1(source, isExplicit) {
	if (isExplicit) {
		if (!YAML_INTEGER_EXPLICIT_PATTERN.test(source)) return NOT_RESOLVED;
	} else if (!YAML_INTEGER_IMPLICIT_PATTERN.test(source)) return NOT_RESOLVED;
	const result = parseYamlInteger$1(source);
	return Number.isFinite(result) ? result : NOT_RESOLVED;
}
/** @category Tags */
var intJsonTag = defineScalarTag("tag:yaml.org,2002:int", {
	implicit: true,
	implicitFirstChars: ["-", ..."0123456789"],
	resolve: resolveYamlInteger$1,
	identify: (object) => Number.isInteger(object) && !Object.is(object, -0) && object.toString(10).indexOf("e") < 0,
	represent: (object) => object.toString(10)
});
//#endregion
//#region src/tag/scalar/int_yaml11.ts
var YAML_INTEGER_PATTERN = /* @__PURE__ */ new RegExp("^(?:[-+]?0b[0-1_]+|[-+]?0[0-7_]+|[-+]?0x[0-9a-fA-F_]+|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+|[-+]?(?:0|[1-9][0-9_]*))$");
function parseYamlInteger(source) {
	let value = source.replace(/_/g, "");
	let sign = 1;
	if (value[0] === "-" || value[0] === "+") {
		if (value[0] === "-") sign = -1;
		value = value.slice(1);
	}
	if (value.startsWith("0b")) return sign * parseInt(value.slice(2), 2);
	if (value.startsWith("0x")) return sign * parseInt(value.slice(2), 16);
	if (value.includes(":")) {
		let result = 0;
		for (const part of value.split(":")) result = result * 60 + Number(part);
		return sign * result;
	}
	if (value !== "0" && value[0] === "0") return sign * parseInt(value, 8);
	return sign * parseInt(value, 10);
}
function resolveYamlInteger(source) {
	if (!YAML_INTEGER_PATTERN.test(source)) return NOT_RESOLVED;
	const result = parseYamlInteger(source);
	return Number.isFinite(result) ? result : NOT_RESOLVED;
}
/** @category Tags */
var intYaml11Tag = defineScalarTag("tag:yaml.org,2002:int", {
	implicit: true,
	implicitFirstChars: [
		"-",
		"+",
		..."0123456789"
	],
	resolve: resolveYamlInteger,
	identify: (object) => Number.isInteger(object) && !Object.is(object, -0) && object.toString(10).indexOf("e") < 0,
	represent: (object) => object.toString(10)
});
//#endregion
//#region src/tag/scalar/float_core.ts
var YAML_FLOAT_PATTERN$1 = /* @__PURE__ */ new RegExp("^(?:[-+]?[0-9]+(?:\\.[0-9]*)?(?:[eE][-+]?[0-9]+)?|[-+]?\\.[0-9]+(?:[eE][-+]?[0-9]+)?|[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$");
var YAML_FLOAT_SPECIAL_PATTERN$1 = /* @__PURE__ */ new RegExp("^(?:[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$");
function resolveYamlFloat$2(source) {
	if (!YAML_FLOAT_PATTERN$1.test(source)) return NOT_RESOLVED;
	let value = source.toLowerCase();
	const sign = value[0] === "-" ? -1 : 1;
	if ("+-".includes(value[0])) value = value.slice(1);
	if (value === ".inf") return sign === 1 ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;
	if (value === ".nan") return NaN;
	const result = sign * parseFloat(value);
	if (Number.isFinite(result) || YAML_FLOAT_SPECIAL_PATTERN$1.test(source)) return result;
	return NOT_RESOLVED;
}
function representYamlFloat$2(object) {
	if (isNaN(object)) return ".nan";
	if (object === Number.POSITIVE_INFINITY) return ".inf";
	if (object === Number.NEGATIVE_INFINITY) return "-.inf";
	if (Object.is(object, -0)) return "-0.0";
	const result = object.toString(10);
	return /^[-+]?[0-9]+e/.test(result) ? result.replace("e", ".e") : result;
}
/** @category Tags */
var floatCoreTag = defineScalarTag("tag:yaml.org,2002:float", {
	implicit: true,
	implicitFirstChars: [
		"-",
		"+",
		".",
		..."0123456789"
	],
	resolve: resolveYamlFloat$2,
	identify: (object) => typeof object === "number" && (!Number.isInteger(object) || Object.is(object, -0) || object.toString(10).indexOf("e") >= 0),
	represent: representYamlFloat$2
});
//#endregion
//#region src/tag/scalar/float_json.ts
var YAML_FLOAT_IMPLICIT_PATTERN = /* @__PURE__ */ new RegExp("^-?(?:0|[1-9][0-9]*)(?:\\.[0-9]*)?(?:[eE][-+]?[0-9]+)?$");
var YAML_FLOAT_EXPLICIT_PATTERN = /* @__PURE__ */ new RegExp("^(?:[-+]?[0-9]+(?:\\.[0-9]*)?(?:[eE][-+]?[0-9]+)?|[-+]?\\.[0-9]+(?:[eE][-+]?[0-9]+)?|[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$");
function resolveYamlFloat$1(source, isExplicit) {
	if (isExplicit) {
		if (!YAML_FLOAT_EXPLICIT_PATTERN.test(source)) return NOT_RESOLVED;
		let value = source.toLowerCase();
		const sign = value[0] === "-" ? -1 : 1;
		if ("+-".includes(value[0])) value = value.slice(1);
		if (value === ".inf") return sign === 1 ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;
		if (value === ".nan") return NaN;
		const result = sign * parseFloat(value);
		return Number.isFinite(result) ? result : NOT_RESOLVED;
	}
	if (!YAML_FLOAT_IMPLICIT_PATTERN.test(source)) return NOT_RESOLVED;
	const result = Number(source);
	if (Number.isFinite(result)) return result;
	return NOT_RESOLVED;
}
function representYamlFloat$1(object) {
	if (isNaN(object)) return ".nan";
	if (object === Number.POSITIVE_INFINITY) return ".inf";
	if (object === Number.NEGATIVE_INFINITY) return "-.inf";
	if (Object.is(object, -0)) return "-0.0";
	const result = object.toString(10);
	return /^[-+]?[0-9]+e/.test(result) ? result.replace("e", ".e") : result;
}
/** @category Tags */
var floatJsonTag = defineScalarTag("tag:yaml.org,2002:float", {
	implicit: true,
	implicitFirstChars: ["-", ..."0123456789"],
	resolve: resolveYamlFloat$1,
	identify: (object) => typeof object === "number" && (!Number.isInteger(object) || Object.is(object, -0) || object.toString(10).indexOf("e") >= 0),
	represent: representYamlFloat$1
});
//#endregion
//#region src/tag/scalar/float_yaml11.ts
var YAML_FLOAT_PATTERN = /* @__PURE__ */ new RegExp("^(?:[-+]?(?:(?:[0-9][0-9_]*)?\\.[0-9_]*)(?:[eE][-+][0-9]+)?|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*|[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$");
var YAML_FLOAT_SPECIAL_PATTERN = /* @__PURE__ */ new RegExp("^(?:[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$");
function resolveYamlFloat(source) {
	if (!YAML_FLOAT_PATTERN.test(source)) return NOT_RESOLVED;
	let value = source.toLowerCase().replace(/_/g, "");
	const sign = value[0] === "-" ? -1 : 1;
	if ("+-".includes(value[0])) value = value.slice(1);
	if (value === ".inf") return sign === 1 ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;
	if (value === ".nan") return NaN;
	let result = 0;
	if (value.includes(":")) {
		for (const part of value.split(":")) result = result * 60 + Number(part);
		result *= sign;
	} else result = sign * parseFloat(value);
	if (Number.isFinite(result) || YAML_FLOAT_SPECIAL_PATTERN.test(source)) return result;
	return NOT_RESOLVED;
}
function representYamlFloat(object) {
	if (isNaN(object)) return ".nan";
	if (object === Number.POSITIVE_INFINITY) return ".inf";
	if (object === Number.NEGATIVE_INFINITY) return "-.inf";
	if (Object.is(object, -0)) return "-0.0";
	const result = object.toString(10);
	return /^[-+]?[0-9]+e/.test(result) ? result.replace("e", ".e") : result;
}
/** @category Tags */
var floatYaml11Tag = defineScalarTag("tag:yaml.org,2002:float", {
	implicit: true,
	implicitFirstChars: [
		"-",
		"+",
		".",
		..."0123456789"
	],
	resolve: resolveYamlFloat,
	identify: (object) => typeof object === "number" && (!Number.isInteger(object) || Object.is(object, -0) || object.toString(10).indexOf("e") >= 0),
	represent: representYamlFloat
});
//#endregion
//#region src/tag/scalar/merge.ts
/**
* Enables merge keys in {@link CORE_SCHEMA} when added with
* {@link Schema.withTags}.
*
* @category Tags
*/
var mergeTag = defineScalarTag("tag:yaml.org,2002:merge", {
	implicit: true,
	implicitFirstChars: ["<"],
	resolve: (source, isExplicit) => {
		if (source === "<<" || isExplicit && source === "") return "<<";
		return NOT_RESOLVED;
	},
	identify: () => false
});
//#endregion
//#region src/tag/scalar/binary.ts
var BASE64_PATTERN = /^[A-Za-z0-9+/]*={0,2}$/;
function resolveYamlBinary(source) {
	const input = source.replace(/\s/g, "");
	if (input.length % 4 !== 0 || !BASE64_PATTERN.test(input)) return NOT_RESOLVED;
	const binary = atob(input);
	const result = new Uint8Array(binary.length);
	for (let index = 0; index < binary.length; index++) result[index] = binary.charCodeAt(index);
	return result;
}
function representYamlBinary(object) {
	let binary = "";
	for (let index = 0; index < object.length; index++) binary += String.fromCharCode(object[index]);
	return btoa(binary);
}
/**
* The `!!binary` tag, represented as a `Uint8Array`.
*
* @category Tags
*/
var binaryTag = defineScalarTag("tag:yaml.org,2002:binary", {
	resolve: resolveYamlBinary,
	identify: (object) => Object.prototype.toString.call(object) === "[object Uint8Array]",
	represent: representYamlBinary
});
//#endregion
//#region src/tag/scalar/timestamp.ts
var YAML_DATE_REGEXP = /* @__PURE__ */ new RegExp("^([0-9][0-9][0-9][0-9])-([0-9][0-9])-([0-9][0-9])$");
var YAML_TIMESTAMP_REGEXP = /* @__PURE__ */ new RegExp("^([0-9][0-9][0-9][0-9])-([0-9][0-9]?)-([0-9][0-9]?)(?:[Tt]|[ \\t]+)([0-9][0-9]?):([0-9][0-9]):([0-9][0-9])(?:\\.([0-9]*))?(?:[ \\t]*(Z|([-+])([0-9][0-9]?)(?::([0-9][0-9]))?))?$");
function makeUtcDate(year, month, day, hour = 0, minute = 0, second = 0, fraction = 0) {
	const date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));
	date.setUTCFullYear(year, month, day);
	return date;
}
function resolveYamlTimestamp(source) {
	let match = YAML_DATE_REGEXP.exec(source);
	if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(source);
	if (match === null) return NOT_RESOLVED;
	const year = +match[1];
	const month = +match[2] - 1;
	const day = +match[3];
	if (!match[4]) {
		const date = makeUtcDate(year, month, day);
		if (date.getUTCFullYear() !== year || date.getUTCMonth() !== month || date.getUTCDate() !== day) return NOT_RESOLVED;
		return date;
	}
	const hour = +match[4];
	const minute = +match[5];
	const second = +match[6];
	let fraction = 0;
	if (hour > 23 || minute > 59 || second > 59) return NOT_RESOLVED;
	if (match[7]) {
		let value = match[7].slice(0, 3);
		while (value.length < 3) value += "0";
		fraction = +value;
	}
	const date = makeUtcDate(year, month, day, hour, minute, second, fraction);
	if (date.getUTCFullYear() !== year || date.getUTCMonth() !== month || date.getUTCDate() !== day) return NOT_RESOLVED;
	if (match[9]) {
		const offsetHour = +match[10];
		const offsetMinute = +(match[11] || 0);
		if (offsetHour > 23 || offsetMinute > 59) return NOT_RESOLVED;
		const offset = (offsetHour * 60 + offsetMinute) * 6e4;
		date.setTime(date.getTime() - (match[9] === "-" ? -offset : offset));
	}
	return date;
}
/**
* The YAML 1.1 `!!timestamp` tag, represented as a JavaScript `Date`.
*
* @category Tags
*/
var timestampTag = defineScalarTag("tag:yaml.org,2002:timestamp", {
	implicit: true,
	implicitFirstChars: [..."0123456789"],
	resolve: resolveYamlTimestamp,
	identify: (object) => object instanceof Date,
	represent: (object) => object.toISOString()
});
//#endregion
//#region src/tag/sequence/seq.ts
/** @category Tags */
var seqTag = defineSequenceTag("tag:yaml.org,2002:seq", {
	create: () => [],
	addItem: (container, item) => {
		container.push(item);
	},
	identify: Array.isArray
});
//#endregion
//#region src/common/object.ts
function isPlainObject(data) {
	if (data === null || typeof data !== "object" || Array.isArray(data)) return false;
	const prototype = Object.getPrototypeOf(data);
	return prototype === null || prototype === Object.prototype;
}
function pick(object, keys) {
	const result = {};
	for (const key of keys) if (object[key] !== void 0) result[key] = object[key];
	return result;
}
//#endregion
//#region src/tag/sequence/omap.ts
/**
* Provided only for YAML 1.1 compatibility and supported by the loader only.
* JavaScript has no dedicated class to represent this type, so it cannot be
* identified and dumped.
*
* ```yaml
* !!omap
*   - one: 1
*   - two: 2
* ```
*
* is loaded as
*
* ```javascript
* [
*   { one: 1 },
*   { two: 2 }
* ]
* ```
*
* @category Tags
*/
var omapTag = defineSequenceTag("tag:yaml.org,2002:omap", {
	create: () => ({
		list: [],
		seen: /* @__PURE__ */ new Set()
	}),
	addItem: (carrier, item) => {
		let key;
		if (item instanceof Map) {
			if (item.size !== 1) return "cannot resolve an ordered map item";
			key = item.keys().next().value;
		} else if (isPlainObject(item)) {
			const itemKeys = Object.keys(item);
			if (itemKeys.length !== 1) return "cannot resolve an ordered map item";
			key = itemKeys[0];
		} else return "cannot resolve an ordered map item";
		if (carrier.seen.has(key)) return "duplicate key in ordered map";
		carrier.seen.add(key);
		carrier.list.push(item);
		return "";
	},
	finalize: (carrier) => carrier.list,
	identify: () => false
});
//#endregion
//#region src/tag/sequence/pairs.ts
/**
* Provided only for YAML 1.1 compatibility and supported by the loader only.
* JavaScript has no dedicated class to represent this type, so it cannot be
* identified and dumped.
*
* ```yaml
* !!pairs
*   - one: 1
*   - two: 2
* ```
*
* is loaded as
*
* ```javascript
* [
*   ['one', 1],
*   ['two', 2]
* ]
* ```
*
* @category Tags
*/
var pairsTag = defineSequenceTag("tag:yaml.org,2002:pairs", {
	create: () => [],
	addItem: (container, item) => {
		if (item instanceof Map) {
			if (item.size !== 1) return "cannot resolve a pairs item";
			container.push(item.entries().next().value);
			return "";
		}
		if (Object.prototype.toString.call(item) !== "[object Object]") return "cannot resolve a pairs item";
		const object = item;
		const keys = Object.keys(object);
		if (keys.length !== 1) return "cannot resolve a pairs item";
		container.push([keys[0], object[keys[0]]]);
		return "";
	},
	identify: () => false
});
//#endregion
//#region src/tag/mapping/map.ts
/**
* This is the default mapping implementation. It uses `{}` objects and has only
* partial functionality due to language limitations. This choice was made
* because users expect to get JavaScript objects, and it was left unchanged to
* avoid too many breaking changes in the v5 release.
*
* Side effects:
*
* - `Object.hasOwn()` checks or `for...of` loops are required for safe use (to
*   avoid falling through to prototypes).
* - Only scalar string keys are supported properly.
* - Other scalar keys, such as `null` and numbers, are converted to strings.
*   This is historical behaviour, and it can cause side effects such as
*   problems with `!!merge`.
*
* Note that non-string scalar keys may be deprecated in future versions.
*
* Ideally, use {@link realMapTag} instead.
*
* @category Tags
*/
var mapTag = defineMappingTag("tag:yaml.org,2002:map", {
	create: () => ({}),
	identify: isPlainObject,
	represent: (o) => {
		const map = /* @__PURE__ */ new Map();
		for (const key of Object.keys(o)) map.set(key, o[key]);
		return map;
	},
	addPair: (container, key, value) => {
		if (key !== null && typeof key === "object") return "object-based map does not support complex keys";
		const normalizedKey = String(key);
		if (normalizedKey === "__proto__") Object.defineProperty(container, normalizedKey, {
			value,
			enumerable: true,
			configurable: true,
			writable: true
		});
		else container[normalizedKey] = value;
		return "";
	},
	has: (container, key) => {
		if (key !== null && typeof key === "object") return false;
		return Object.prototype.hasOwnProperty.call(container, String(key));
	},
	keys: (container) => Object.keys(container),
	get: (container, key) => {
		const normalizedKey = String(key);
		if (!Object.prototype.hasOwnProperty.call(container, normalizedKey)) return null;
		return container[normalizedKey];
	}
});
//#endregion
//#region src/tag/mapping/set.ts
/**
* The YAML 1.1 `!!set` tag, represented as a JavaScript `Set`.
*
* @category Tags
*/
var setTag = defineMappingTag("tag:yaml.org,2002:set", {
	create: () => /* @__PURE__ */ new Set(),
	identify: (data) => data instanceof Set,
	represent: (data) => {
		const map = /* @__PURE__ */ new Map();
		for (const key of data) map.set(key, null);
		return map;
	},
	addPair: (container, key, value) => {
		if (value !== null) return "cannot resolve a set item";
		container.add(key);
		return "";
	},
	has: (container, key) => container.has(key),
	keys: (container) => container.keys(),
	get: () => null
});
//#endregion
//#region \0@oxc-project+runtime@0.137.0/helpers/esm/typeof.js
function _typeof(o) {
	"@babel/helpers - typeof";
	return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function(o) {
		return typeof o;
	} : function(o) {
		return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o;
	}, _typeof(o);
}
//#endregion
//#region \0@oxc-project+runtime@0.137.0/helpers/esm/toPrimitive.js
function toPrimitive(t, r) {
	if ("object" != _typeof(t) || !t) return t;
	var e = t[Symbol.toPrimitive];
	if (void 0 !== e) {
		var i = e.call(t, r || "default");
		if ("object" != _typeof(i)) return i;
		throw new TypeError("@@toPrimitive must return a primitive value.");
	}
	return ("string" === r ? String : Number)(t);
}
//#endregion
//#region \0@oxc-project+runtime@0.137.0/helpers/esm/toPropertyKey.js
function toPropertyKey(t) {
	var i = toPrimitive(t, "string");
	return "symbol" == _typeof(i) ? i : i + "";
}
//#endregion
//#region \0@oxc-project+runtime@0.137.0/helpers/esm/defineProperty.js
function _defineProperty(e, r, t) {
	return (r = toPropertyKey(r)) in e ? Object.defineProperty(e, r, {
		value: t,
		enumerable: !0,
		configurable: !0,
		writable: !0
	}) : e[r] = t, e;
}
//#endregion
//#region \0@oxc-project+runtime@0.137.0/helpers/esm/objectSpread2.js
function ownKeys(e, r) {
	var t = Object.keys(e);
	if (Object.getOwnPropertySymbols) {
		var o = Object.getOwnPropertySymbols(e);
		r && (o = o.filter(function(r) {
			return Object.getOwnPropertyDescriptor(e, r).enumerable;
		})), t.push.apply(t, o);
	}
	return t;
}
function _objectSpread2(e) {
	for (var r = 1; r < arguments.length; r++) {
		var t = null != arguments[r] ? arguments[r] : {};
		r % 2 ? ownKeys(Object(t), !0).forEach(function(r) {
			_defineProperty(e, r, t[r]);
		}) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function(r) {
			Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r));
		});
	}
	return e;
}
//#endregion
//#region src/schema.ts
function createTagDefinitionMap() {
	return {
		scalar: Object.create(null),
		sequence: Object.create(null),
		mapping: Object.create(null)
	};
}
function createTagDefinitionListMap() {
	return {
		scalar: [],
		sequence: [],
		mapping: []
	};
}
function compileTags(tags) {
	const result = [];
	for (const tag of tags) {
		let index = result.length;
		for (let previousIndex = 0; previousIndex < result.length; previousIndex++) {
			const previous = result[previousIndex];
			if (previous.nodeKind === tag.nodeKind && previous.tagName === tag.tagName && previous.matchByTagPrefix === tag.matchByTagPrefix) {
				index = previousIndex;
				break;
			}
		}
		result[index] = tag;
	}
	return result;
}
/**
* Controls tag resolution when loading and type selection when dumping.
*
* @category Schemas
*/
var Schema = class Schema {
	constructor(tags) {
		_defineProperty(this, "tags", void 0);
		_defineProperty(
			this,
			/** @internal */
			"implicitScalarTags",
			void 0
		);
		_defineProperty(
			this,
			/**
			* Dispatch implicit scalar resolvers by `source.charAt(0)`. Each bucket holds
			* the resolvers that may match that key, in schema order; a key absent from
			* the map uses
			* {@link Schema.implicitScalarAnyFirstChar}
			* (resolvers that declared no first-char constraint, so they apply to any
			* first character).
			*/
			"implicitScalarByFirstChar",
			void 0
		);
		_defineProperty(this, "implicitScalarAnyFirstChar", void 0);
		_defineProperty(
			this,
			/**
			* The default scalar tag (`!!str`), resolved once so the composer's fallback
			* for unresolved plain scalars avoids a keyed lookup per scalar.
			*
			* @internal
			*/
			"defaultScalarTag",
			void 0
		);
		_defineProperty(
			this,
			/**
			* The default container tags (`!!seq` / `!!map`), used by the dumper: when a
			* value is identified by its default tag, the tag is implicit and not
			* printed. Undefined if the schema does not define them (then such values
			* can't be dumped).
			*
			* @internal
			*/
			"defaultSequenceTag",
			void 0
		);
		_defineProperty(
			this,
			/** @internal */
			"defaultMappingTag",
			void 0
		);
		_defineProperty(this, "exact", void 0);
		_defineProperty(this, "prefix", void 0);
		const compiledTags = compileTags(tags);
		const implicitScalarTags = [];
		const exact = createTagDefinitionMap();
		const prefix = createTagDefinitionListMap();
		for (const tag of compiledTags) {
			if (tag.nodeKind === "scalar" && tag.implicit) {
				if (tag.matchByTagPrefix) throw new Error("Implicit scalar tags cannot match by tag prefix");
				implicitScalarTags.push(tag);
			}
			switch (tag.nodeKind) {
				case "scalar":
					if (tag.matchByTagPrefix) prefix.scalar.push(tag);
					else exact.scalar[tag.tagName] = tag;
					break;
				case "sequence":
					if (tag.matchByTagPrefix) prefix.sequence.push(tag);
					else exact.sequence[tag.tagName] = tag;
					break;
				case "mapping":
					if (tag.matchByTagPrefix) prefix.mapping.push(tag);
					else exact.mapping[tag.tagName] = tag;
					break;
			}
		}
		const implicitScalarAnyFirstChar = implicitScalarTags.filter((tag) => tag.implicitFirstChars === null);
		const keys = /* @__PURE__ */ new Set();
		for (const tag of implicitScalarTags) if (tag.implicitFirstChars !== null) for (const key of tag.implicitFirstChars) keys.add(key);
		const implicitScalarByFirstChar = /* @__PURE__ */ new Map();
		for (const key of keys) implicitScalarByFirstChar.set(key, implicitScalarTags.filter((tag) => tag.implicitFirstChars === null || tag.implicitFirstChars.indexOf(key) !== -1));
		const defaultScalarTag = exact.scalar["tag:yaml.org,2002:str"];
		if (!defaultScalarTag) throw new Error("schema does not define the default scalar tag (tag:yaml.org,2002:str)");
		this.tags = compiledTags;
		this.implicitScalarTags = implicitScalarTags;
		this.implicitScalarByFirstChar = implicitScalarByFirstChar;
		this.implicitScalarAnyFirstChar = implicitScalarAnyFirstChar;
		this.defaultScalarTag = defaultScalarTag;
		this.defaultSequenceTag = exact.sequence["tag:yaml.org,2002:seq"];
		this.defaultMappingTag = exact.mapping["tag:yaml.org,2002:map"];
		this.exact = exact;
		this.prefix = prefix;
	}
	/** @internal */
	lookupScalarTag(tagName) {
		const exactTag = this.exact.scalar[tagName];
		if (exactTag) return exactTag;
		for (const tag of this.prefix.scalar) if (tagName.startsWith(tag.tagName)) return tag;
	}
	/** @internal */
	lookupSequenceTag(tagName) {
		const exactTag = this.exact.sequence[tagName];
		if (exactTag) return exactTag;
		for (const tag of this.prefix.sequence) if (tagName.startsWith(tag.tagName)) return tag;
	}
	/** @internal */
	lookupMappingTag(tagName) {
		const exactTag = this.exact.mapping[tagName];
		if (exactTag) return exactTag;
		for (const tag of this.prefix.mapping) if (tagName.startsWith(tag.tagName)) return tag;
	}
	/** @internal */
	resolveImplicitScalarTag(source) {
		var _this$implicitScalarB;
		const candidates = (_this$implicitScalarB = this.implicitScalarByFirstChar.get(source.charAt(0))) !== null && _this$implicitScalarB !== void 0 ? _this$implicitScalarB : this.implicitScalarAnyFirstChar;
		for (const tag of candidates) {
			const value = tag.resolve(source, false, tag.tagName);
			if (value !== NOT_RESOLVED) return {
				value,
				tag
			};
		}
		const tag = this.defaultScalarTag;
		return {
			value: tag.resolve(source, false, tag.tagName),
			tag
		};
	}
	/**
	* Creates a new schema with the specified tags added. If a tag already
	* exists, it is replaced by the specified tag.
	*
	* @example
	*
	* ```javascript
	* import { CORE_SCHEMA, mergeTag, realMapTag } from 'js-yaml'
	*
	* const schema = CORE_SCHEMA.withTags(mergeTag, realMapTag)
	* ```
	*/
	withTags(...tags) {
		let flatTags = [];
		for (const tag of tags) flatTags = flatTags.concat(tag);
		return new Schema([...this.tags, ...flatTags]);
	}
};
/**
* The YAML 1.2 Failsafe Schema: strings, sequences, and mappings.
*
* @category Schemas
*/
var FAILSAFE_SCHEMA = new Schema([
	strTag,
	seqTag,
	mapTag
]);
/**
* The YAML 1.2 JSON Schema. It uses JSON scalar forms while retaining YAML
* collection syntax.
*
* @category Schemas
*/
var JSON_SCHEMA = new Schema([
	...FAILSAFE_SCHEMA.tags,
	nullJsonTag,
	boolJsonTag,
	intJsonTag,
	floatJsonTag
]);
/**
* The default schema for the loaders. Note, {@link CORE_SCHEMA} comes
* without the `!!merge` tag. You can easily enable it if needed.
*
* @example
* Enable {@link mergeTag}:
*
* ```javascript
* import { load, CORE_SCHEMA, mergeTag } from 'js-yaml'
*
* try {
*   load(data, { schema: CORE_SCHEMA.withTags(mergeTag) })
* } catch (e) {
*   console.error(e)
* }
* ```
*
* @category Schemas
*/
var CORE_SCHEMA = new Schema([
	...FAILSAFE_SCHEMA.tags,
	nullCoreTag,
	boolCoreTag,
	intCoreTag,
	floatCoreTag
]);
/**
* YAML 1.1-compatible schema.
*
* @category Schemas
*/
var YAML11_SCHEMA = new Schema([
	...FAILSAFE_SCHEMA.tags,
	nullYaml11Tag,
	boolYaml11Tag,
	intYaml11Tag,
	floatYaml11Tag,
	timestampTag,
	mergeTag,
	binaryTag,
	omapTag,
	pairsTag,
	setTag
]);
/**
* The dumper schema for maximum compatibility. It combines all supported type
* variants from YAML 1.1 and YAML 1.2 so strings matching any of them are
* quoted. This makes the generated YAML more compatible with other parsers.
*
* The schema is based on YAML 1.1, but extends `!!int` and `!!float` to accept
* both YAML 1.1 and Core Schema forms, since Core Schema supports some forms
* that YAML 1.1 does not.
*
* @category Schemas
*/
var DUMP_SCHEMA = YAML11_SCHEMA.withTags(_objectSpread2(_objectSpread2({}, intYaml11Tag), {}, { resolve: (source, isExplicit, tagName) => {
	const result = intYaml11Tag.resolve(source, isExplicit, tagName);
	return result === NOT_RESOLVED ? intCoreTag.resolve(source, isExplicit, tagName) : result;
} }), _objectSpread2(_objectSpread2({}, floatYaml11Tag), {}, { resolve: (source, isExplicit, tagName) => {
	const result = floatYaml11Tag.resolve(source, isExplicit, tagName);
	return result === NOT_RESOLVED ? floatCoreTag.resolve(source, isExplicit, tagName) : result;
} }));
//#endregion
//#region src/tag/mapping/real_map.ts
/**
* Recommended when non-string keys are actually needed. It uses native
* JavaScript `Map` objects, so keys keep their constructed types instead of
* being converted to strings.
*
* It is not the default to avoid widespread breaking changes in existing
* projects. `Map` has a different access API and does not pass deep equality
* checks against `{}`-based fixtures. Alongside the other changes in v5,
* making it the default was considered too disruptive.
*
* If these differences are acceptable for your project, we recommend using
* {@link realMapTag} to guarantee the absence of problems and side effects.
*
* @example
* Enable {@link realMapTag}:
*
* ```javascript
* import { load, CORE_SCHEMA, realMapTag } from 'js-yaml'
*
* try {
*   load(data, { schema: CORE_SCHEMA.withTags(realMapTag) })
* } catch (e) {
*   console.error(e)
* }
* ```
*
* @category Tags
*/
var realMapTag = defineMappingTag("tag:yaml.org,2002:map", {
	create: () => /* @__PURE__ */ new Map(),
	addPair: (container, key, value) => {
		container.set(key, value);
		return "";
	},
	has: (container, key) => container.has(key),
	keys: (container) => container.keys(),
	get: (container, key) => container.get(key),
	identify: (data) => data instanceof Map || isPlainObject(data),
	represent: (data) => {
		if (data instanceof Map) return data;
		const map = /* @__PURE__ */ new Map();
		const obj = data;
		for (const key of Object.keys(obj)) map.set(key, obj[key]);
		return map;
	}
});
//#endregion
//#region src/tag/mapping/legacy_map.ts
function normalizeKey(key) {
	if (Array.isArray(key)) {
		const array = Array.prototype.slice.call(key);
		for (let index = 0; index < array.length; index++) {
			if (Array.isArray(array[index])) return null;
			if (typeof array[index] === "object" && Object.prototype.toString.call(array[index]) === "[object Object]") array[index] = "[object Object]";
		}
		return String(array);
	}
	if (typeof key === "object" && Object.prototype.toString.call(key) === "[object Object]") return "[object Object]";
	return String(key);
}
/**
* This implementation exists solely to reproduce v4 behavior exactly. Its use
* is strongly discouraged. If complex or non-string keys are needed, use
* {@link realMapTag} instead.
*
* @category Tags
*/
var legacyMapTag = defineMappingTag("tag:yaml.org,2002:map", {
	create: () => ({}),
	identify: isPlainObject,
	represent: (o) => {
		const map = /* @__PURE__ */ new Map();
		for (const key of Object.keys(o)) map.set(key, o[key]);
		return map;
	},
	addPair: (container, key, value) => {
		const normalizedKey = normalizeKey(key);
		if (normalizedKey === null) return "nested arrays are not supported inside keys";
		if (normalizedKey === "__proto__") Object.defineProperty(container, normalizedKey, {
			value,
			enumerable: true,
			configurable: true,
			writable: true
		});
		else container[normalizedKey] = value;
		return "";
	},
	has: (container, key) => {
		const normalizedKey = normalizeKey(key);
		return normalizedKey !== null && Object.prototype.hasOwnProperty.call(container, normalizedKey);
	},
	keys: (container) => Object.keys(container),
	get: (container, key) => {
		const normalizedKey = String(key);
		if (!Object.prototype.hasOwnProperty.call(container, normalizedKey)) return null;
		return container[normalizedKey];
	}
});
//#endregion
//#region src/common/snippet.ts
var DEFAULT_SNIPPET_OPTIONS = {
	maxLength: 79,
	indent: 1,
	linesBefore: 3,
	linesAfter: 2
};
function getLine(buffer, lineStart, lineEnd, position, maxLineLength) {
	let head = "";
	let tail = "";
	const maxHalfLength = Math.floor(maxLineLength / 2) - 1;
	if (position - lineStart > maxHalfLength) {
		head = " ... ";
		lineStart = position - maxHalfLength + head.length;
	}
	if (lineEnd - position > maxHalfLength) {
		tail = " ...";
		lineEnd = position + maxHalfLength - tail.length;
	}
	return {
		str: head + buffer.slice(lineStart, lineEnd).replace(/\t/g, "→") + tail,
		pos: position - lineStart + head.length
	};
}
function padStart(string, max) {
	return " ".repeat(Math.max(max - string.length, 0)) + string;
}
function makeSnippet(mark, options) {
	if (!mark.buffer) return null;
	const opts = _objectSpread2(_objectSpread2({}, DEFAULT_SNIPPET_OPTIONS), options);
	const re = /\r?\n|\r|\0/g;
	const lineStarts = [0];
	const lineEnds = [];
	let match;
	let foundLineNo = -1;
	while (match = re.exec(mark.buffer)) {
		lineEnds.push(match.index);
		lineStarts.push(match.index + match[0].length);
		if (mark.position <= match.index && foundLineNo < 0) foundLineNo = lineStarts.length - 2;
	}
	if (foundLineNo < 0) foundLineNo = lineStarts.length - 1;
	let result = "";
	const lineNoLength = Math.min(mark.line + opts.linesAfter, lineEnds.length).toString().length;
	const maxLineLength = opts.maxLength - (opts.indent + lineNoLength + 3);
	for (let i = 1; i <= opts.linesBefore; i++) {
		if (foundLineNo - i < 0) break;
		const line = getLine(mark.buffer, lineStarts[foundLineNo - i], lineEnds[foundLineNo - i], mark.position - (lineStarts[foundLineNo] - lineStarts[foundLineNo - i]), maxLineLength);
		result = `${" ".repeat(opts.indent)}${padStart((mark.line - i + 1).toString(), lineNoLength)} | ${line.str}\n${result}`;
	}
	const line = getLine(mark.buffer, lineStarts[foundLineNo], lineEnds[foundLineNo], mark.position, maxLineLength);
	result += `${" ".repeat(opts.indent)}${padStart((mark.line + 1).toString(), lineNoLength)} | ${line.str}\n`;
	result += `${"-".repeat(opts.indent + lineNoLength + 3 + line.pos)}^\n`;
	for (let i = 1; i <= opts.linesAfter; i++) {
		if (foundLineNo + i >= lineEnds.length) break;
		const line = getLine(mark.buffer, lineStarts[foundLineNo + i], lineEnds[foundLineNo + i], mark.position - (lineStarts[foundLineNo] - lineStarts[foundLineNo + i]), maxLineLength);
		result += `${" ".repeat(opts.indent)}${padStart((mark.line + i + 1).toString(), lineNoLength)} | ${line.str}\n`;
	}
	return result.replace(/\n$/, "");
}
//#endregion
//#region src/common/exception.ts
function formatError(exception, compact) {
	let where = "";
	if (!exception.mark) return exception.reason;
	if (exception.mark.name) where += `in "${exception.mark.name}" `;
	where += `(${exception.mark.line + 1}:${exception.mark.column + 1})`;
	if (!compact && exception.mark.snippet) where += `\n\n${exception.mark.snippet}`;
	return `${exception.reason} ${where}`;
}
/**
* A YAML error. Unlike an ordinary `Error`, it adds a source snippet showing
* the location of the problem to the error message, when available.
*
* @category Main
*/
var YAMLException = class YAMLException extends Error {
	/**
	* Optional `mark` contains source snippet data. Usually, use
	* {@link YAMLException.throwAt} instead of passing it directly.
	*/
	constructor(reason, mark) {
		super();
		_defineProperty(this, "reason", void 0);
		_defineProperty(this, "mark", void 0);
		this.name = "YAMLException";
		this.reason = reason;
		this.mark = mark;
		this.message = formatError(this, false);
		if (Error.captureStackTrace) Error.captureStackTrace(this, this.constructor);
	}
	/**
	* Returns the formatted error, omitting the source snippet in compact mode.
	*/
	toString(compact) {
		return `${this.name}: ${formatError(this, compact)}`;
	}
	/**
	* Builds a YAMLException with a source snippet and throws it. `source` is
	* the raw input text; `position` is an offset into it.
	*/
	static throwAt(source, position, message, filename = "") {
		let line = 0;
		let lineStart = 0;
		for (let index = 0; index < position; index++) {
			const ch = source.charCodeAt(index);
			if (ch === 10) {
				line++;
				lineStart = index + 1;
			} else if (ch === 13) {
				line++;
				if (source.charCodeAt(index + 1) === 10) index++;
				lineStart = index + 1;
			}
		}
		const mark = {
			name: filename,
			buffer: source,
			position,
			line,
			column: position - lineStart
		};
		mark.snippet = makeSnippet(mark);
		throw new YAMLException(message, mark);
	}
};
//#endregion
//#region src/parser/events.ts
/** @category Events */
var EVENT_ID = {
	DOCUMENT: 1,
	SEQUENCE: 2,
	MAPPING: 3,
	SCALAR: 4,
	ALIAS: 5,
	POP: 6
};
/** @category Nodes */
var SCALAR_STYLE = {
	PLAIN: 1,
	SINGLE_QUOTED: 2,
	DOUBLE_QUOTED: 3,
	LITERAL_BLOCK: 4,
	FOLDED_BLOCK: 5
};
/** @category Nodes */
var COLLECTION_STYLE = {
	BLOCK: 1,
	FLOW: 2
};
/** @category Nodes */
var CHOMPING_MODE = {
	CLIP: 1,
	STRIP: 2,
	KEEP: 3
};
//#endregion
//#region src/parser/parser_scalar.ts
var NO_RANGE$3 = -1;
function simpleEscapeSequence(c) {
	switch (c) {
		case 48: return "\0";
		case 97: return "\x07";
		case 98: return "\b";
		case 116: return "	";
		case 9: return "	";
		case 110: return "\n";
		case 118: return "\v";
		case 102: return "\f";
		case 114: return "\r";
		case 101: return "\x1B";
		case 32: return " ";
		case 34: return "\"";
		case 47: return "/";
		case 92: return "\\";
		case 78: return "";
		case 95: return "\xA0";
		case 76: return "\u2028";
		case 80: return "\u2029";
		default: return "";
	}
}
var simpleEscapeCheck = new Array(256);
var simpleEscapeMap = new Array(256);
for (let i = 0; i < 256; i++) {
	simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;
	simpleEscapeMap[i] = simpleEscapeSequence(i);
}
function charFromCodepoint(c) {
	if (c <= 65535) return String.fromCharCode(c);
	return String.fromCharCode((c - 65536 >> 10) + 55296, (c - 65536 & 1023) + 56320);
}
function fromHexCode$1(c) {
	if (c >= 48 && c <= 57) return c - 48;
	return (c | 32) - 97 + 10;
}
function escapedHexLen$1(c) {
	if (c === 120) return 2;
	if (c === 117) return 4;
	return 8;
}
function skipFoldedBreaks(input, position, end) {
	let breaks = 0;
	while (position < end) {
		const ch = input.charCodeAt(position);
		if (ch === 10) {
			breaks++;
			position++;
		} else if (ch === 13) {
			breaks++;
			position++;
			if (input.charCodeAt(position) === 10) position++;
		} else if (ch === 32 || ch === 9) position++;
		else break;
	}
	return {
		position,
		breaks
	};
}
function foldedBreaks(count) {
	if (count === 1) return " ";
	return "\n".repeat(count - 1);
}
function getPlainValue(input, start, end) {
	let result = "";
	let position = start;
	let captureStart = start;
	let captureEnd = start;
	while (position < end) {
		const ch = input.charCodeAt(position);
		if (ch === 10 || ch === 13) {
			result += input.slice(captureStart, captureEnd);
			const fold = skipFoldedBreaks(input, position, end);
			result += foldedBreaks(fold.breaks);
			position = captureStart = captureEnd = fold.position;
		} else {
			position++;
			if (ch !== 32 && ch !== 9) captureEnd = position;
		}
	}
	return result + input.slice(captureStart, captureEnd);
}
function getSingleQuotedValue(input, start, end) {
	let result = "";
	let position = start;
	let captureStart = start;
	let captureEnd = start;
	while (position < end) {
		const ch = input.charCodeAt(position);
		if (ch === 39) {
			result += input.slice(captureStart, position) + "'";
			position += 2;
			captureStart = captureEnd = position;
		} else if (ch === 10 || ch === 13) {
			result += input.slice(captureStart, captureEnd);
			const fold = skipFoldedBreaks(input, position, end);
			result += foldedBreaks(fold.breaks);
			position = captureStart = captureEnd = fold.position;
		} else {
			position++;
			if (ch !== 32 && ch !== 9) captureEnd = position;
		}
	}
	return result + input.slice(captureStart, end);
}
function getDoubleQuotedValue(input, start, end) {
	let result = "";
	let position = start;
	let captureStart = start;
	let captureEnd = start;
	while (position < end) {
		const ch = input.charCodeAt(position);
		if (ch === 92) {
			result += input.slice(captureStart, position);
			position++;
			const escaped = input.charCodeAt(position);
			if (escaped === 10 || escaped === 13) position = skipFoldedBreaks(input, position, end).position;
			else if (escaped < 256 && simpleEscapeCheck[escaped]) {
				result += simpleEscapeMap[escaped];
				position++;
			} else {
				let hexLength = escapedHexLen$1(escaped);
				let hexResult = 0;
				for (; hexLength > 0; hexLength--) {
					position++;
					const digit = fromHexCode$1(input.charCodeAt(position));
					hexResult = (hexResult << 4) + digit;
				}
				result += charFromCodepoint(hexResult);
				position++;
			}
			captureStart = captureEnd = position;
		} else if (ch === 10 || ch === 13) {
			result += input.slice(captureStart, captureEnd);
			const fold = skipFoldedBreaks(input, position, end);
			result += foldedBreaks(fold.breaks);
			position = captureStart = captureEnd = fold.position;
		} else {
			position++;
			if (ch !== 32 && ch !== 9) captureEnd = position;
		}
	}
	return result + input.slice(captureStart, end);
}
function getBlockValue(input, start, end, indent, chomping, folded) {
	const textIndent = indent < 0 ? 0 : indent;
	const region = input.slice(start, end).replace(/\r\n?/g, "\n");
	const lines = region === "" ? [] : (region.endsWith("\n") ? region.slice(0, -1) : region).split("\n");
	let result = "";
	let didReadContent = false;
	let emptyLines = 0;
	let atMoreIndented = false;
	for (const line of lines) {
		let column = 0;
		while (column < textIndent && line.charCodeAt(column) === 32) column++;
		if (indent < 0 || column >= line.length) {
			emptyLines++;
			continue;
		}
		const content = line.slice(textIndent);
		const first = content.charCodeAt(0);
		if (folded) if (first === 32 || first === 9) {
			atMoreIndented = true;
			result += "\n".repeat(didReadContent ? 1 + emptyLines : emptyLines);
		} else if (atMoreIndented) {
			atMoreIndented = false;
			result += "\n".repeat(emptyLines + 1);
		} else if (emptyLines === 0) {
			if (didReadContent) result += " ";
		} else result += "\n".repeat(emptyLines);
		else result += "\n".repeat(didReadContent ? 1 + emptyLines : emptyLines);
		result += content;
		didReadContent = true;
		emptyLines = 0;
	}
	if (chomping === CHOMPING_MODE.KEEP) result += "\n".repeat(didReadContent ? 1 + emptyLines : emptyLines);
	else if (chomping !== CHOMPING_MODE.STRIP) {
		if (didReadContent) result += "\n";
	}
	return result;
}
/**
* Decodes the scalar referenced by event offsets in `input`.
*
* @category Events
*/
function getScalarValue(input, scalar) {
	if (scalar.valueStart === NO_RANGE$3) return "";
	const { valueStart, valueEnd } = scalar;
	if (scalar.fast) return input.slice(valueStart, valueEnd);
	switch (scalar.style) {
		case SCALAR_STYLE.SINGLE_QUOTED: return getSingleQuotedValue(input, valueStart, valueEnd);
		case SCALAR_STYLE.DOUBLE_QUOTED: return getDoubleQuotedValue(input, valueStart, valueEnd);
		case SCALAR_STYLE.LITERAL_BLOCK: return getBlockValue(input, valueStart, valueEnd, scalar.indent, scalar.chomping, false);
		case SCALAR_STYLE.FOLDED_BLOCK: return getBlockValue(input, valueStart, valueEnd, scalar.indent, scalar.chomping, true);
		default: return getPlainValue(input, valueStart, valueEnd);
	}
}
//#endregion
//#region src/common/tagname.ts
var DEFAULT_TAG_HANDLERS = Object.assign(Object.create(null), {
	"!": "!",
	"!!": "tag:yaml.org,2002:"
});
function tagPercentEncode(source) {
	return encodeURI(source).replace(/!/g, "%21");
}
function tagNameFull(rawTag, tagHandlers) {
	var _ref, _tagHandlers$handle;
	if (rawTag.startsWith("!<") && rawTag.endsWith(">")) return decodeURIComponent(rawTag.slice(2, -1));
	const handleEnd = rawTag.indexOf("!", 1);
	const handle = handleEnd === -1 ? "!" : rawTag.slice(0, handleEnd + 1);
	const prefix = (_ref = (_tagHandlers$handle = tagHandlers === null || tagHandlers === void 0 ? void 0 : tagHandlers[handle]) !== null && _tagHandlers$handle !== void 0 ? _tagHandlers$handle : DEFAULT_TAG_HANDLERS[handle]) !== null && _ref !== void 0 ? _ref : handle;
	return decodeURIComponent(prefix) + decodeURIComponent(rawTag.slice(handle.length));
}
function tagNameShort(fullTag) {
	let tag = fullTag;
	if (tag.charCodeAt(0) === 33) {
		tag = tag.slice(1);
		return `!${tagPercentEncode(tag)}`;
	}
	if (tag.slice(0, 18) === "tag:yaml.org,2002:") return `!!${tagPercentEncode(tag.slice(18))}`;
	return `!<${tagPercentEncode(tag)}>`;
}
//#endregion
//#region src/parser/constructor.ts
var NO_RANGE$2 = -1;
var MERGE_TAG_NAME = "tag:yaml.org,2002:merge";
var DEFAULT_CONSTRUCTOR_OPTIONS = {
	filename: "",
	schema: CORE_SCHEMA,
	json: false,
	maxTotalMergeKeys: 1e4,
	maxAliases: -1
};
function eventPosition$1(event) {
	if ("tagStart" in event && event.tagStart !== NO_RANGE$2) return event.tagStart;
	if ("anchorStart" in event && event.anchorStart !== NO_RANGE$2) return event.anchorStart;
	if ("valueStart" in event && event.valueStart !== NO_RANGE$2) return event.valueStart;
	if ("start" in event) return event.start;
	return 0;
}
function throwError$1(state, message) {
	YAMLException.throwAt(state.source, state.position, message, state.filename);
}
function finalizeCollection(state, position, tag, carrier) {
	try {
		return tag.finalize(carrier);
	} catch (error) {
		if (error instanceof YAMLException) throw error;
		YAMLException.throwAt(state.source, position, error instanceof Error ? error.message : String(error), state.filename);
	}
}
function constructScalar(state, event) {
	const source = getScalarValue(state.source, event);
	const rawTag = event.tagStart === NO_RANGE$2 ? "" : state.source.slice(event.tagStart, event.tagEnd);
	const strTag = state.schema.defaultScalarTag;
	if (rawTag !== "") {
		var _state$schema$lookupM;
		if (rawTag === "!") return {
			value: source,
			tag: strTag
		};
		const tagName = tagNameFull(rawTag, state.tagHandlers);
		const scalarTag = state.schema.lookupScalarTag(tagName);
		if (scalarTag) {
			const result = scalarTag.resolve(source, true, tagName);
			if (result === NOT_RESOLVED) throwError$1(state, `cannot resolve a node with !<${tagName}> explicit tag`);
			return {
				value: result,
				tag: scalarTag
			};
		}
		const collectionTagDef = (_state$schema$lookupM = state.schema.lookupMappingTag(tagName)) !== null && _state$schema$lookupM !== void 0 ? _state$schema$lookupM : state.schema.lookupSequenceTag(tagName);
		if (collectionTagDef) {
			if (source !== "") throwError$1(state, `cannot resolve a node with !<${tagName}> explicit tag`);
			const carrier = collectionTagDef.create(tagName);
			return {
				value: collectionTagDef.carrierIsResult ? carrier : finalizeCollection(state, state.position, collectionTagDef, carrier),
				tag: collectionTagDef
			};
		}
		throwError$1(state, `unknown scalar tag !<${tagName}>`);
	}
	if (event.style === SCALAR_STYLE.PLAIN) return state.schema.resolveImplicitScalarTag(source);
	return {
		value: strTag.resolve(source, false, strTag.tagName),
		tag: strTag
	};
}
function collectionTagName(state, event, defaultTagName) {
	const rawTag = event.tagStart === NO_RANGE$2 ? "" : state.source.slice(event.tagStart, event.tagEnd);
	return rawTag === "" || rawTag === "!" ? defaultTagName : tagNameFull(rawTag, state.tagHandlers);
}
function isMappingTag(tag) {
	return tag.nodeKind === "mapping";
}
function chargeMergeWork(state) {
	state.totalMergeKeys++;
	if (state.maxTotalMergeKeys !== -1 && state.totalMergeKeys > state.maxTotalMergeKeys) throwError$1(state, `merge keys exceeded maxTotalMergeKeys (${state.maxTotalMergeKeys})`);
}
function mergeKeys(state, frame, source, sourceTag) {
	chargeMergeWork(state);
	for (const sourceKey of sourceTag.keys(source)) {
		var _frame$overridable;
		chargeMergeWork(state);
		if (frame.tag.has(frame.value, sourceKey)) continue;
		const err = frame.tag.addPair(frame.value, sourceKey, sourceTag.get(source, sourceKey));
		if (err) throwError$1(state, err);
		(_frame$overridable = frame.overridable) !== null && _frame$overridable !== void 0 || (frame.overridable = /* @__PURE__ */ new Set());
		frame.overridable.add(sourceKey);
	}
}
function mergeSource(state, frame, source, sourceTag) {
	state.position = frame.keyPosition;
	if (isMappingTag(sourceTag)) mergeKeys(state, frame, source, sourceTag);
	else if (sourceTag.nodeKind === "sequence" && Array.isArray(source)) {
		if (source.length > 100) throwError$1(state, "abnormal merge sequence size");
		for (const element of source) {
			const elementTag = state.nodeTags.get(element);
			if (!elementTag) throwError$1(state, "cannot merge mappings; the provided source object is unacceptable");
			mergeKeys(state, frame, element, elementTag);
		}
	} else throwError$1(state, "cannot merge mappings; the provided source object is unacceptable");
}
function addMappingValue(state, frame, key, value, tag) {
	var _frame$overridable2, _frame$overridable3;
	state.position = frame.keyPosition;
	if (frame.keyIsMerge) {
		mergeSource(state, frame, value, tag);
		return;
	}
	if (!state.json && frame.tag.has(frame.value, key) && !((_frame$overridable2 = frame.overridable) === null || _frame$overridable2 === void 0 ? void 0 : _frame$overridable2.has(key))) throwError$1(state, "duplicated mapping key");
	const err = frame.tag.addPair(frame.value, key, value);
	if (err) throwError$1(state, err);
	(_frame$overridable3 = frame.overridable) === null || _frame$overridable3 === void 0 || _frame$overridable3.delete(key);
}
function addValue(state, value, tag) {
	const frame = state.frames[state.frames.length - 1];
	if (frame.kind === "document") {
		frame.value = value;
		frame.hasValue = true;
	} else if (frame.kind === "sequence") {
		if (isMappingTag(tag)) state.nodeTags.set(value, tag);
		const err = frame.tag.addItem(frame.value, value, frame.index++);
		if (err) throwError$1(state, err);
	} else if (frame.hasKey) {
		const key = frame.key;
		frame.key = void 0;
		frame.hasKey = false;
		addMappingValue(state, frame, key, value, tag);
	} else {
		frame.key = value;
		frame.keyPosition = state.position;
		frame.hasKey = true;
		frame.keyIsMerge = tag.tagName === MERGE_TAG_NAME;
	}
}
function storeAnchor(state, event, value, tag, isValueFinal) {
	if (event.anchorStart !== NO_RANGE$2) {
		const anchor = {
			value,
			tag,
			isValueFinal
		};
		state.anchors.set(state.source.slice(event.anchorStart, event.anchorEnd), anchor);
		return anchor;
	}
	return null;
}
/**
* Constructs JavaScript documents directly from parser events, without an
* intermediate AST.
*
* @category Events
*/
function constructFromEvents(events, options) {
	const state = _objectSpread2(_objectSpread2(_objectSpread2({}, DEFAULT_CONSTRUCTOR_OPTIONS), options), {}, {
		events,
		documents: [],
		eventIndex: 0,
		position: 0,
		frames: [],
		anchors: /* @__PURE__ */ new Map(),
		nodeTags: /* @__PURE__ */ new Map(),
		tagHandlers: Object.create(null),
		totalMergeKeys: 0,
		aliasCount: 0
	});
	while (state.eventIndex < state.events.length) {
		const event = state.events[state.eventIndex++];
		state.position = eventPosition$1(event);
		switch (event.type) {
			case EVENT_ID.DOCUMENT:
				state.anchors = /* @__PURE__ */ new Map();
				state.nodeTags = /* @__PURE__ */ new Map();
				state.aliasCount = 0;
				state.tagHandlers = Object.create(null);
				for (const directive of event.directives) if (directive.kind === "tag") state.tagHandlers[directive.handle] = directive.prefix;
				state.frames.push({
					kind: "document",
					position: state.position,
					value: void 0,
					hasValue: false
				});
				break;
			case EVENT_ID.SCALAR: {
				const { value, tag } = constructScalar(state, event);
				storeAnchor(state, event, value, tag, true);
				addValue(state, value, tag);
				break;
			}
			case EVENT_ID.SEQUENCE: {
				const tagName = collectionTagName(state, event, "tag:yaml.org,2002:seq");
				const tag = state.schema.lookupSequenceTag(tagName);
				if (!tag) throwError$1(state, `unknown sequence tag !<${tagName}>`);
				const value = tag.create(tagName);
				const anchor = storeAnchor(state, event, value, tag, tag.carrierIsResult);
				state.frames.push({
					kind: "sequence",
					position: state.position,
					value,
					tag,
					anchor,
					index: 0
				});
				break;
			}
			case EVENT_ID.MAPPING: {
				const tagName = collectionTagName(state, event, "tag:yaml.org,2002:map");
				const tag = state.schema.lookupMappingTag(tagName);
				if (!tag) throwError$1(state, `unknown mapping tag !<${tagName}>`);
				const value = tag.create(tagName);
				const anchor = storeAnchor(state, event, value, tag, tag.carrierIsResult);
				state.frames.push({
					kind: "mapping",
					position: state.position,
					value,
					tag,
					anchor,
					key: void 0,
					keyPosition: state.position,
					hasKey: false,
					keyIsMerge: false,
					overridable: null
				});
				break;
			}
			case EVENT_ID.ALIAS: {
				if (state.maxAliases !== -1 && ++state.aliasCount > state.maxAliases) throwError$1(state, `aliases exceeded maxAliases (${state.maxAliases})`);
				const name = state.source.slice(event.anchorStart, event.anchorEnd);
				const anchor = state.anchors.get(name);
				if (!anchor) throwError$1(state, `unidentified alias "${name}"`);
				if (!anchor.isValueFinal) throwError$1(state, `recursive alias "${name}" is not supported for tag ${anchor.tag.tagName} because it uses finalize()`);
				addValue(state, anchor.value, anchor.tag);
				break;
			}
			case EVENT_ID.POP: {
				const frame = state.frames.pop();
				if (frame.kind === "mapping" && frame.hasKey) {
					state.position = frame.keyPosition;
					throwError$1(state, "incomplete mapping pair in event stream");
				}
				if (frame.kind === "document") state.documents.push(frame.value);
				else {
					const value = frame.tag.carrierIsResult ? frame.value : finalizeCollection(state, frame.position, frame.tag, frame.value);
					if (frame.anchor) {
						frame.anchor.value = value;
						frame.anchor.isValueFinal = true;
					}
					addValue(state, value, frame.tag);
				}
				break;
			}
		}
	}
	return state.documents;
}
//#endregion
//#region src/parser/parser.ts
var NO_RANGE$1 = -1;
var HAS_OWN = Object.prototype.hasOwnProperty;
var CONTEXT_FLOW_IN = 1;
var CONTEXT_FLOW_OUT = 2;
var CONTEXT_BLOCK_IN = 3;
var CONTEXT_BLOCK_OUT = 4;
var PATTERN_NON_PRINTABLE = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
var PATTERN_FLOW_INDICATORS = /[,\[\]{}]/;
var PATTERN_TAG_HANDLE = /^(?:!|!!|![0-9A-Za-z-]+!)$/;
var NS_URI_CHAR = String.raw`(?:%[0-9A-Fa-f]{2}|[0-9A-Za-z\-#;/?:@&=+$,_.!~*'()\[\]])`;
var NS_TAG_CHAR = String.raw`(?:%[0-9A-Fa-f]{2}|[0-9A-Za-z\-#;/?:@&=+$.~*'()_])`;
var PATTERN_TAG_URI = new RegExp(`^(?:${NS_URI_CHAR})*$`);
var PATTERN_TAG_SUFFIX = new RegExp(`^(?:${NS_TAG_CHAR})+$`);
var PATTERN_TAG_PREFIX = new RegExp(`^(?:!(?:${NS_URI_CHAR})*|${NS_TAG_CHAR}(?:${NS_URI_CHAR})*)$`);
var DEFAULT_PARSER_OPTIONS = {
	filename: "",
	maxDepth: 100
};
function addDocumentEvent(state, explicitStart, explicitEnd) {
	state.events.push({
		type: EVENT_ID.DOCUMENT,
		explicitStart,
		explicitEnd,
		directives: state.directives
	});
}
function addSequenceEvent(state, start, anchorStart, anchorEnd, tagStart, tagEnd, style) {
	state.events.push({
		type: EVENT_ID.SEQUENCE,
		start,
		anchorStart,
		anchorEnd,
		tagStart,
		tagEnd,
		style
	});
}
function addMappingEvent(state, start, anchorStart, anchorEnd, tagStart, tagEnd, style) {
	state.events.push({
		type: EVENT_ID.MAPPING,
		start,
		anchorStart,
		anchorEnd,
		tagStart,
		tagEnd,
		style
	});
}
function insertFlowPairMappingEvent(state, snapshot) {
	state.events.splice(snapshot.eventsLength, 0, {
		type: EVENT_ID.MAPPING,
		start: snapshot.position,
		anchorStart: NO_RANGE$1,
		anchorEnd: NO_RANGE$1,
		tagStart: NO_RANGE$1,
		tagEnd: NO_RANGE$1,
		style: COLLECTION_STYLE.FLOW
	});
}
function addScalarEvent(state, valueStart, valueEnd, anchorStart, anchorEnd, tagStart, tagEnd, style, chomping = CHOMPING_MODE.CLIP, indent = -1, fast = false) {
	state.events.push({
		type: EVENT_ID.SCALAR,
		valueStart,
		valueEnd,
		anchorStart,
		anchorEnd,
		tagStart,
		tagEnd,
		style,
		chomping,
		indent,
		fast
	});
}
function addAliasEvent(state, anchorStart, anchorEnd) {
	state.events.push({
		type: EVENT_ID.ALIAS,
		anchorStart,
		anchorEnd
	});
}
function addPopEvent(state) {
	state.events.push({ type: EVENT_ID.POP });
}
function addEmptyScalarEvent(state) {
	addScalarEvent(state, NO_RANGE$1, NO_RANGE$1, NO_RANGE$1, NO_RANGE$1, NO_RANGE$1, NO_RANGE$1, SCALAR_STYLE.PLAIN);
}
function emptyProperties() {
	return {
		anchorStart: NO_RANGE$1,
		anchorEnd: NO_RANGE$1,
		tagStart: NO_RANGE$1,
		tagEnd: NO_RANGE$1
	};
}
function snapshotState(state) {
	return {
		position: state.position,
		line: state.line,
		lineStart: state.lineStart,
		lineIndent: state.lineIndent,
		firstTabInLine: state.firstTabInLine,
		eventsLength: state.events.length
	};
}
function restoreState(state, snapshot) {
	state.position = snapshot.position;
	state.line = snapshot.line;
	state.lineStart = snapshot.lineStart;
	state.lineIndent = snapshot.lineIndent;
	state.firstTabInLine = snapshot.firstTabInLine;
	state.events.length = snapshot.eventsLength;
}
function throwError(state, message) {
	YAMLException.throwAt(state.input.slice(0, state.length), state.position, message, state.filename);
}
function isEol(c) {
	return c === 10 || c === 13;
}
function isWhiteSpace(c) {
	return c === 9 || c === 32;
}
function isWsOrEol(c) {
	return isWhiteSpace(c) || isEol(c);
}
function isWsOrEolOrEnd(c) {
	return c === 0 || isWsOrEol(c);
}
function isFlowIndicator(c) {
	return c === 44 || c === 91 || c === 93 || c === 123 || c === 125;
}
function fromDecimalCode(c) {
	return c >= 48 && c <= 57 ? c - 48 : -1;
}
function fromHexCode(c) {
	if (c >= 48 && c <= 57) return c - 48;
	const lc = c | 32;
	if (lc >= 97 && lc <= 102) return lc - 97 + 10;
	return -1;
}
function escapedHexLen(c) {
	if (c === 120) return 2;
	if (c === 117) return 4;
	if (c === 85) return 8;
	return 0;
}
function isSimpleEscape(c) {
	return c === 48 || c === 97 || c === 98 || c === 116 || c === 9 || c === 110 || c === 118 || c === 102 || c === 114 || c === 101 || c === 32 || c === 34 || c === 47 || c === 92 || c === 78 || c === 95 || c === 76 || c === 80;
}
function consumeLineBreak(state) {
	if (state.input.charCodeAt(state.position) === 10) state.position++;
	else {
		state.position++;
		if (state.input.charCodeAt(state.position) === 10) state.position++;
	}
	state.line++;
	state.lineStart = state.position;
	state.lineIndent = 0;
	state.firstTabInLine = -1;
}
function skipSeparationSpace(state, allowComments) {
	let lineBreaks = 0;
	let ch = state.input.charCodeAt(state.position);
	let hasSeparation = state.position === state.lineStart || isWsOrEol(state.input.charCodeAt(state.position - 1));
	while (ch !== 0) {
		while (isWhiteSpace(ch)) {
			hasSeparation = true;
			if (ch === 9 && state.firstTabInLine === -1) state.firstTabInLine = state.position;
			ch = state.input.charCodeAt(++state.position);
		}
		if (allowComments && hasSeparation && ch === 35) do
			ch = state.input.charCodeAt(++state.position);
		while (!isEol(ch) && ch !== 0);
		if (!isEol(ch)) break;
		consumeLineBreak(state);
		lineBreaks++;
		hasSeparation = true;
		ch = state.input.charCodeAt(state.position);
		while (ch === 32) {
			state.lineIndent++;
			ch = state.input.charCodeAt(++state.position);
		}
	}
	return lineBreaks;
}
function testDocumentSeparator(state, position = state.position) {
	const ch = state.input.charCodeAt(position);
	if ((ch === 45 || ch === 46) && ch === state.input.charCodeAt(position + 1) && ch === state.input.charCodeAt(position + 2)) {
		const following = state.input.charCodeAt(position + 3);
		return following === 0 || isWsOrEol(following);
	}
	return false;
}
function skipByteOrderMark(state) {
	if (state.position === state.lineStart && state.input.charCodeAt(state.position) === 65279) {
		state.position++;
		state.lineStart = state.position;
	}
}
function testDocumentBoundary(state) {
	if (state.position !== state.lineStart) return false;
	if (testDocumentSeparator(state)) return true;
	if (state.input.charCodeAt(state.position) !== 65279) return false;
	const snapshot = snapshotState(state);
	skipByteOrderMark(state);
	skipSeparationSpace(state, true);
	const ch = state.input.charCodeAt(state.position);
	const result = state.position === state.lineStart && (ch === 37 || ch === 45 && testDocumentSeparator(state));
	restoreState(state, snapshot);
	return result;
}
function skipUntilLineEnd(state) {
	let ch = state.input.charCodeAt(state.position);
	while (ch !== 0 && !isEol(ch)) ch = state.input.charCodeAt(++state.position);
}
function checkPrintable(state, start, end) {
	if (PATTERN_NON_PRINTABLE.test(state.input.slice(start, end))) throwError(state, "the stream contains non-printable characters");
}
function readTagProperty(state, props, inFlow) {
	if (state.input.charCodeAt(state.position) !== 33) return false;
	if (props.tagStart !== NO_RANGE$1) throwError(state, "duplication of a tag property");
	const start = state.position;
	let isVerbatim = false;
	let isNamed = false;
	let tagHandle = "!";
	let ch = state.input.charCodeAt(++state.position);
	if (ch === 60) {
		isVerbatim = true;
		ch = state.input.charCodeAt(++state.position);
	} else if (ch === 33) {
		isNamed = true;
		tagHandle = "!!";
		ch = state.input.charCodeAt(++state.position);
	}
	let suffixStart = state.position;
	let tagName;
	if (isVerbatim) {
		while (ch !== 0 && ch !== 62) ch = state.input.charCodeAt(++state.position);
		if (ch !== 62) throwError(state, "unexpected end of the stream within a verbatim tag");
		tagName = state.input.slice(suffixStart, state.position);
		state.position++;
	} else {
		while (ch !== 0 && !isWsOrEol(ch) && !(inFlow && isFlowIndicator(ch))) {
			if (ch === 33) if (!isNamed) {
				tagHandle = state.input.slice(suffixStart - 1, state.position + 1);
				if (!PATTERN_TAG_HANDLE.test(tagHandle)) throwError(state, "named tag handle cannot contain such characters");
				isNamed = true;
				suffixStart = state.position + 1;
			} else throwError(state, "tag suffix cannot contain exclamation marks");
			ch = state.input.charCodeAt(++state.position);
		}
		tagName = state.input.slice(suffixStart, state.position);
		if (PATTERN_FLOW_INDICATORS.test(tagName)) throwError(state, "tag suffix cannot contain flow indicator characters");
	}
	if (tagName && !(isVerbatim ? PATTERN_TAG_URI.test(tagName) : PATTERN_TAG_SUFFIX.test(tagName))) throwError(state, `tag name cannot contain such characters: ${tagName}`);
	if (!isVerbatim && tagHandle !== "!" && tagHandle !== "!!" && !HAS_OWN.call(state.tagHandlers, tagHandle)) throwError(state, `undeclared tag handle "${tagHandle}"`);
	props.tagStart = start;
	props.tagEnd = state.position;
	return true;
}
function readAnchorProperty(state, props) {
	if (state.input.charCodeAt(state.position) !== 38) return false;
	if (props.anchorStart !== NO_RANGE$1) throwError(state, "duplication of an anchor property");
	state.position++;
	const start = state.position;
	while (state.input.charCodeAt(state.position) !== 0 && !isWsOrEol(state.input.charCodeAt(state.position)) && !isFlowIndicator(state.input.charCodeAt(state.position))) state.position++;
	if (state.position === start) throwError(state, "name of an anchor node must contain at least one character");
	props.anchorStart = start;
	props.anchorEnd = state.position;
	return true;
}
function readAlias(state, props) {
	if (state.input.charCodeAt(state.position) !== 42) return false;
	if (props.anchorStart !== NO_RANGE$1 || props.tagStart !== NO_RANGE$1) throwError(state, "alias node should not have any properties");
	state.position++;
	const start = state.position;
	while (state.input.charCodeAt(state.position) !== 0 && !isWsOrEol(state.input.charCodeAt(state.position)) && !isFlowIndicator(state.input.charCodeAt(state.position))) state.position++;
	if (state.position === start) throwError(state, "name of an alias node must contain at least one character");
	addAliasEvent(state, start, state.position);
	return true;
}
function readFlowScalarBreak(state, nodeIndent) {
	skipSeparationSpace(state, false);
	if (state.lineIndent < nodeIndent) throwError(state, "deficient indentation");
}
function readSingleQuotedScalar(state, nodeIndent, props) {
	if (state.input.charCodeAt(state.position) !== 39) return false;
	state.position++;
	const start = state.position;
	let simple = true;
	while (state.input.charCodeAt(state.position) !== 0) {
		const ch = state.input.charCodeAt(state.position);
		if (ch === 39) {
			if (state.input.charCodeAt(state.position + 1) === 39) {
				simple = false;
				state.position += 2;
				continue;
			}
			const end = state.position;
			state.position++;
			addScalarEvent(state, start, end, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, SCALAR_STYLE.SINGLE_QUOTED, CHOMPING_MODE.CLIP, -1, simple);
			return true;
		}
		if (isEol(ch)) {
			simple = false;
			readFlowScalarBreak(state, nodeIndent);
		} else if (state.position === state.lineStart && testDocumentSeparator(state)) throwError(state, "unexpected end of the document within a single quoted scalar");
		else if (ch !== 9 && ch < 32) throwError(state, "expected valid JSON character");
		else state.position++;
	}
	throwError(state, "unexpected end of the stream within a single quoted scalar");
}
function readDoubleQuotedScalar(state, nodeIndent, props) {
	if (state.input.charCodeAt(state.position) !== 34) return false;
	state.position++;
	const start = state.position;
	let simple = true;
	while (state.input.charCodeAt(state.position) !== 0) {
		const ch = state.input.charCodeAt(state.position);
		if (ch === 34) {
			const end = state.position;
			state.position++;
			addScalarEvent(state, start, end, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, SCALAR_STYLE.DOUBLE_QUOTED, CHOMPING_MODE.CLIP, -1, simple);
			return true;
		}
		if (ch === 92) {
			simple = false;
			const escaped = state.input.charCodeAt(++state.position);
			if (isEol(escaped)) readFlowScalarBreak(state, nodeIndent);
			else if (isSimpleEscape(escaped)) state.position++;
			else {
				let hexLength = escapedHexLen(escaped);
				if (hexLength === 0) throwError(state, "unknown escape sequence");
				while (hexLength-- > 0) {
					state.position++;
					if (fromHexCode(state.input.charCodeAt(state.position)) < 0) throwError(state, "expected hexadecimal character");
				}
				state.position++;
			}
		} else if (isEol(ch)) {
			simple = false;
			readFlowScalarBreak(state, nodeIndent);
		} else if (state.position === state.lineStart && testDocumentSeparator(state)) throwError(state, "unexpected end of the document within a double quoted scalar");
		else if (ch !== 9 && ch < 32) throwError(state, "expected valid JSON character");
		else state.position++;
	}
	throwError(state, "unexpected end of the stream within a double quoted scalar");
}
function readBlockScalar(state, parentIndent, props) {
	const ch = state.input.charCodeAt(state.position);
	let chomping = CHOMPING_MODE.CLIP;
	let indent = -1;
	let detectedIndent = false;
	if (ch !== 124 && ch !== 62) return false;
	const style = ch === 124 ? SCALAR_STYLE.LITERAL_BLOCK : SCALAR_STYLE.FOLDED_BLOCK;
	state.position++;
	while (state.input.charCodeAt(state.position) !== 0) {
		const current = state.input.charCodeAt(state.position);
		const digit = fromDecimalCode(current);
		if (current === 43 || current === 45) {
			if (chomping !== CHOMPING_MODE.CLIP) throwError(state, "repeat of a chomping mode identifier");
			chomping = current === 43 ? CHOMPING_MODE.KEEP : CHOMPING_MODE.STRIP;
			state.position++;
		} else if (digit >= 0) {
			if (digit === 0) throwError(state, "bad explicit indentation width of a block scalar; it cannot be less than one");
			if (detectedIndent) throwError(state, "repeat of an indentation width identifier");
			indent = parentIndent + digit - 1;
			detectedIndent = true;
			state.position++;
		} else break;
	}
	let hadWhitespace = false;
	while (isWhiteSpace(state.input.charCodeAt(state.position))) {
		hadWhitespace = true;
		state.position++;
	}
	if (hadWhitespace && state.input.charCodeAt(state.position) === 35) skipUntilLineEnd(state);
	if (isEol(state.input.charCodeAt(state.position))) consumeLineBreak(state);
	else if (state.input.charCodeAt(state.position) !== 0) throwError(state, "a line break is expected");
	let contentIndent = detectedIndent ? indent : -1;
	let maxLeadingIndent = 0;
	const valueStart = state.position;
	let valueEnd = state.position;
	while (state.input.charCodeAt(state.position) !== 0) {
		const linePosition = state.position;
		let column = 0;
		while (state.input.charCodeAt(linePosition + column) === 32) column++;
		const first = state.input.charCodeAt(linePosition + column);
		if (first === 0) {
			if (contentIndent >= 0) {
				if (column > contentIndent) valueEnd = linePosition + column;
			} else if (column > 0) valueEnd = linePosition + column;
			break;
		}
		if (testDocumentBoundary(state)) break;
		if (!detectedIndent && contentIndent === -1 && isEol(first)) maxLeadingIndent = Math.max(maxLeadingIndent, column);
		if (!detectedIndent && contentIndent === -1 && !isEol(first)) {
			if (first === 9 && column < parentIndent) {
				state.position = linePosition + column;
				throwError(state, "tab characters must not be used in indentation");
			}
			if (column < maxLeadingIndent) {
				state.position = linePosition + column;
				throwError(state, "bad indentation of a mapping entry");
			}
		}
		if (contentIndent === -1 && first !== 0 && !isEol(first) && column < parentIndent) {
			state.lineIndent = column;
			state.position = linePosition + column;
			break;
		}
		if (!detectedIndent && first !== 0 && !isEol(first) && contentIndent === -1) contentIndent = column;
		const requiredIndent = contentIndent === -1 ? parentIndent + 1 : contentIndent;
		if (first !== 0 && !isEol(first) && column < requiredIndent) {
			state.lineIndent = column;
			state.position = linePosition + column;
			break;
		}
		skipUntilLineEnd(state);
		valueEnd = state.position;
		if (isEol(state.input.charCodeAt(state.position))) {
			consumeLineBreak(state);
			valueEnd = state.position;
		}
	}
	checkPrintable(state, valueStart, valueEnd);
	addScalarEvent(state, valueStart, valueEnd, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, style, chomping, contentIndent);
	return true;
}
function canStartPlainScalar(state, nodeContext) {
	const ch = state.input.charCodeAt(state.position);
	const inFlow = nodeContext === CONTEXT_FLOW_IN;
	if (ch === 0 || isWsOrEol(ch) || ch === 35 || ch === 38 || ch === 42 || ch === 33 || ch === 124 || ch === 62 || ch === 39 || ch === 34 || ch === 37 || ch === 64 || ch === 96 || inFlow && isFlowIndicator(ch)) return false;
	if (ch === 63 || ch === 45) {
		const following = state.input.charCodeAt(state.position + 1);
		if (isWsOrEolOrEnd(following) || inFlow && isFlowIndicator(following)) return false;
	}
	return true;
}
function readPlainScalar(state, nodeIndent, nodeContext, props) {
	if (!canStartPlainScalar(state, nodeContext)) return false;
	const start = state.position;
	let end = state.position;
	let ch = state.input.charCodeAt(state.position);
	const inFlow = nodeContext === CONTEXT_FLOW_IN;
	let multiline = false;
	while (ch !== 0) {
		if (testDocumentBoundary(state)) break;
		if (ch === 58) {
			const following = state.input.charCodeAt(state.position + 1);
			if (isWsOrEolOrEnd(following) || inFlow && isFlowIndicator(following)) break;
		} else if (ch === 35) {
			if (isWsOrEol(state.input.charCodeAt(state.position - 1))) break;
		} else if (inFlow && isFlowIndicator(ch)) break;
		else if (isEol(ch)) {
			const savedPosition = state.position;
			const savedLine = state.line;
			const savedLineStart = state.lineStart;
			const savedLineIndent = state.lineIndent;
			skipSeparationSpace(state, false);
			if (state.lineIndent >= nodeIndent) {
				multiline = true;
				ch = state.input.charCodeAt(state.position);
				continue;
			}
			state.position = savedPosition;
			state.line = savedLine;
			state.lineStart = savedLineStart;
			state.lineIndent = savedLineIndent;
			break;
		}
		if (!isWhiteSpace(ch)) end = state.position + 1;
		ch = state.input.charCodeAt(++state.position);
	}
	if (end === start) return false;
	checkPrintable(state, start, end);
	addScalarEvent(state, start, end, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, SCALAR_STYLE.PLAIN, CHOMPING_MODE.CLIP, -1, !multiline);
	return true;
}
function skipFlowSeparationSpace(state, nodeIndent) {
	const startLine = state.line;
	skipSeparationSpace(state, true);
	if (state.line > startLine && state.lineIndent < nodeIndent || state.firstTabInLine !== -1 && state.lineIndent < nodeIndent) throwError(state, "deficient indentation");
}
function readFlowCollection(state, nodeIndent, props) {
	const ch = state.input.charCodeAt(state.position);
	const isMapping = ch === 123;
	const start = state.position;
	let readNext = true;
	if (ch !== 91 && ch !== 123) return false;
	const terminator = isMapping ? 125 : 93;
	if (isMapping) addMappingEvent(state, start, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, COLLECTION_STYLE.FLOW);
	else addSequenceEvent(state, start, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, COLLECTION_STYLE.FLOW);
	state.position++;
	while (state.input.charCodeAt(state.position) !== 0) {
		skipFlowSeparationSpace(state, nodeIndent);
		let ch = state.input.charCodeAt(state.position);
		if (ch === terminator) {
			state.position++;
			addPopEvent(state);
			return true;
		} else if (!readNext) throwError(state, "missed comma between flow collection entries");
		else if (ch === 44) throwError(state, "expected the node content, but found ','");
		let isPair = false;
		let isExplicitPair = false;
		if (ch === 63 && isWsOrEol(state.input.charCodeAt(state.position + 1))) {
			isPair = isExplicitPair = true;
			state.position += 1;
			skipFlowSeparationSpace(state, nodeIndent);
		}
		const entryLine = state.line;
		const entryStart = snapshotState(state);
		const keyWasRead = parseNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
		skipFlowSeparationSpace(state, nodeIndent);
		ch = state.input.charCodeAt(state.position);
		if ((isMapping || isExplicitPair || state.line === entryLine) && ch === 58) {
			isPair = true;
			state.position++;
			skipFlowSeparationSpace(state, nodeIndent);
			if (!isMapping) {
				insertFlowPairMappingEvent(state, entryStart);
				if (!keyWasRead) addEmptyScalarEvent(state);
			} else if (!keyWasRead) addEmptyScalarEvent(state);
			if (!parseNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true)) addEmptyScalarEvent(state);
			skipFlowSeparationSpace(state, nodeIndent);
			if (!isMapping) addPopEvent(state);
		} else if (isMapping && isPair) {
			if (!keyWasRead) addEmptyScalarEvent(state);
			addEmptyScalarEvent(state);
		} else if (isMapping) addEmptyScalarEvent(state);
		else if (isPair) {
			insertFlowPairMappingEvent(state, entryStart);
			if (!keyWasRead) addEmptyScalarEvent(state);
			addEmptyScalarEvent(state);
			addPopEvent(state);
		}
		ch = state.input.charCodeAt(state.position);
		if (ch === 44) {
			readNext = true;
			state.position++;
		} else readNext = false;
	}
	throwError(state, "unexpected end of the stream within a flow collection");
}
function readBlockSequence(state, nodeIndent, props) {
	if (state.firstTabInLine !== -1 || state.input.charCodeAt(state.position) !== 45 || !isWsOrEolOrEnd(state.input.charCodeAt(state.position + 1))) return false;
	addSequenceEvent(state, state.position, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, COLLECTION_STYLE.BLOCK);
	while (state.input.charCodeAt(state.position) === 45 && isWsOrEolOrEnd(state.input.charCodeAt(state.position + 1))) {
		if (state.firstTabInLine !== -1) {
			state.position = state.firstTabInLine;
			throwError(state, "tab characters must not be used in indentation");
		}
		const entryLine = state.line;
		state.position++;
		const hadBreak = skipSeparationSpace(state, true) > 0;
		if (state.firstTabInLine !== -1 && state.input.charCodeAt(state.position) === 45 && isWsOrEolOrEnd(state.input.charCodeAt(state.position + 1))) throwError(state, "bad indentation of a sequence entry");
		if (hadBreak && state.lineIndent <= nodeIndent) addEmptyScalarEvent(state);
		else parseNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);
		skipSeparationSpace(state, true);
		if (state.lineIndent < nodeIndent || state.position >= state.length) break;
		if (state.lineIndent > nodeIndent) throwError(state, "bad indentation of a sequence entry");
		if (state.line === entryLine && state.input.charCodeAt(state.position) === 45 && isWsOrEolOrEnd(state.input.charCodeAt(state.position + 1))) throwError(state, "bad indentation of a sequence entry");
	}
	addPopEvent(state);
	return true;
}
function readBlockMapping(state, nodeIndent, flowIndent, props) {
	let atExplicitKey = false;
	let detected = false;
	let mappingOpened = false;
	let pendingExplicitKey = false;
	if (state.firstTabInLine !== -1) return false;
	let ch = state.input.charCodeAt(state.position);
	while (ch !== 0) {
		if (!atExplicitKey && state.firstTabInLine !== -1) {
			state.position = state.firstTabInLine;
			throwError(state, "tab characters must not be used in indentation");
		}
		const following = state.input.charCodeAt(state.position + 1);
		const entryLine = state.line;
		if ((ch === 63 || ch === 58) && isWsOrEolOrEnd(following)) {
			if (!mappingOpened) {
				addMappingEvent(state, state.position, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, COLLECTION_STYLE.BLOCK);
				mappingOpened = true;
			}
			if (ch === 63) {
				if (atExplicitKey) addEmptyScalarEvent(state);
				detected = true;
				atExplicitKey = true;
			} else if (atExplicitKey) atExplicitKey = false;
			else {
				addEmptyScalarEvent(state);
				detected = true;
				atExplicitKey = false;
			}
			state.position += 1;
			pendingExplicitKey = true;
		} else {
			if (atExplicitKey) {
				addEmptyScalarEvent(state);
				atExplicitKey = false;
			}
			const beforeKey = snapshotState(state);
			if (!parseNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) break;
			if (state.line === entryLine) {
				ch = state.input.charCodeAt(state.position);
				while (isWhiteSpace(ch)) ch = state.input.charCodeAt(++state.position);
				if (ch === 58) {
					ch = state.input.charCodeAt(++state.position);
					if (!isWsOrEolOrEnd(ch)) throwError(state, "a whitespace character is expected after the key-value separator within a block mapping");
					if (!mappingOpened) {
						restoreState(state, beforeKey);
						addMappingEvent(state, beforeKey.position, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, COLLECTION_STYLE.BLOCK);
						mappingOpened = true;
						parseNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true);
						ch = state.input.charCodeAt(state.position);
						while (isWhiteSpace(ch)) ch = state.input.charCodeAt(++state.position);
						state.position++;
					}
					detected = true;
					atExplicitKey = false;
					pendingExplicitKey = false;
				} else if (detected) throwError(state, "expected ':' after a mapping key");
				else {
					if (props.anchorStart !== NO_RANGE$1 || props.tagStart !== NO_RANGE$1) {
						restoreState(state, beforeKey);
						return false;
					}
					return true;
				}
			} else if (detected) throwError(state, "can not read a block mapping entry; a multiline key may not be an implicit key");
			else {
				if (props.anchorStart !== NO_RANGE$1 || props.tagStart !== NO_RANGE$1) {
					restoreState(state, beforeKey);
					return false;
				}
				return true;
			}
		}
		if (parseNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, pendingExplicitKey)) pendingExplicitKey = false;
		if (!atExplicitKey) {
			if (pendingExplicitKey) {
				addEmptyScalarEvent(state);
				pendingExplicitKey = false;
			}
		}
		skipSeparationSpace(state, true);
		ch = state.input.charCodeAt(state.position);
		if ((state.line === entryLine || state.lineIndent > nodeIndent) && ch !== 0) throwError(state, "bad indentation of a mapping entry");
		else if (state.lineIndent < nodeIndent) break;
	}
	if (!detected) return false;
	if (atExplicitKey) addEmptyScalarEvent(state);
	if (mappingOpened) addPopEvent(state);
	return true;
}
function parseNode(state, parentIndent, nodeContext, allowToSeek, allowCompact, allowPropertyMapping = true) {
	if (state.depth >= state.maxDepth) throwError(state, `nesting exceeded maxDepth (${state.maxDepth})`);
	state.depth++;
	let indentStatus = 1;
	let atNewLine = false;
	let hasContent = false;
	let propertyStart = null;
	const props = emptyProperties();
	let allowBlockScalars = nodeContext === CONTEXT_BLOCK_OUT || nodeContext === CONTEXT_BLOCK_IN;
	let allowBlockCollections = allowBlockScalars;
	const allowBlockStyles = allowBlockScalars;
	if (allowToSeek && skipSeparationSpace(state, true)) {
		atNewLine = true;
		if (state.lineIndent > parentIndent) indentStatus = 1;
		else if (state.lineIndent === parentIndent) indentStatus = 0;
		else indentStatus = -1;
	}
	if (indentStatus === 1) while (true) {
		const ch = state.input.charCodeAt(state.position);
		const propertyState = snapshotState(state);
		if (atNewLine && indentStatus !== 1 && (ch === 33 || ch === 38)) break;
		if (atNewLine && allowBlockStyles && (props.tagStart !== NO_RANGE$1 || props.anchorStart !== NO_RANGE$1) && (ch === 33 || ch === 38)) {
			var _state$events$fallbac;
			const fallbackState = snapshotState(state);
			const flowIndent = parentIndent + 1;
			if (readBlockMapping(state, state.position - state.lineStart, flowIndent, props) && ((_state$events$fallbac = state.events[fallbackState.eventsLength]) === null || _state$events$fallbac === void 0 ? void 0 : _state$events$fallbac.type) === EVENT_ID.MAPPING) {
				state.depth--;
				return true;
			}
			restoreState(state, fallbackState);
		}
		if (atNewLine && (ch === 33 && props.tagStart !== NO_RANGE$1 || ch === 38 && props.anchorStart !== NO_RANGE$1)) break;
		if (!readTagProperty(state, props, nodeContext === CONTEXT_FLOW_IN) && !readAnchorProperty(state, props)) break;
		if (propertyStart === null) propertyStart = propertyState;
		if (skipSeparationSpace(state, true)) {
			atNewLine = true;
			allowBlockCollections = allowBlockStyles;
			if (state.lineIndent > parentIndent) indentStatus = 1;
			else if (state.lineIndent === parentIndent) indentStatus = 0;
			else indentStatus = -1;
		} else allowBlockCollections = false;
	}
	if (allowBlockCollections) allowBlockCollections = atNewLine || allowCompact;
	if (indentStatus === 1 || nodeContext === CONTEXT_BLOCK_OUT) {
		const flowIndent = nodeContext === CONTEXT_FLOW_IN || nodeContext === CONTEXT_FLOW_OUT ? parentIndent : parentIndent + 1;
		const blockIndent = state.position - state.lineStart;
		if (indentStatus === 1) if (allowBlockCollections && (readBlockSequence(state, blockIndent, props) || readBlockMapping(state, blockIndent, flowIndent, props)) || readFlowCollection(state, flowIndent, props)) hasContent = true;
		else {
			const ch = state.input.charCodeAt(state.position);
			if (propertyStart !== null && allowPropertyMapping && allowBlockStyles && !allowBlockCollections && ch !== 124 && ch !== 62) {
				var _state$events$fallbac2;
				const fallbackState = snapshotState(state);
				const propertyIndent = propertyStart.position - propertyStart.lineStart;
				restoreState(state, propertyStart);
				if (readBlockMapping(state, propertyIndent, flowIndent, emptyProperties()) && ((_state$events$fallbac2 = state.events[fallbackState.eventsLength]) === null || _state$events$fallbac2 === void 0 ? void 0 : _state$events$fallbac2.type) === EVENT_ID.MAPPING) hasContent = true;
				else restoreState(state, fallbackState);
			}
			if (!hasContent && (allowBlockScalars && readBlockScalar(state, flowIndent, props) || readSingleQuotedScalar(state, flowIndent, props) || readDoubleQuotedScalar(state, flowIndent, props) || readAlias(state, props) || readPlainScalar(state, flowIndent, nodeContext, props))) hasContent = true;
		}
		else if (indentStatus === 0) hasContent = allowBlockCollections && readBlockSequence(state, blockIndent, props);
	}
	allowBlockScalars = allowBlockScalars && !hasContent;
	if (!hasContent && (props.anchorStart !== NO_RANGE$1 || props.tagStart !== NO_RANGE$1 || allowBlockScalars)) {
		addScalarEvent(state, NO_RANGE$1, NO_RANGE$1, props.anchorStart, props.anchorEnd, props.tagStart, props.tagEnd, SCALAR_STYLE.PLAIN);
		hasContent = true;
	}
	state.depth--;
	return hasContent || props.anchorStart !== NO_RANGE$1 || props.tagStart !== NO_RANGE$1;
}
function readDirective(state) {
	if (state.lineIndent > 0 || state.input.charCodeAt(state.position) !== 37) return false;
	state.position++;
	const nameStart = state.position;
	while (state.input.charCodeAt(state.position) !== 0 && !isWsOrEol(state.input.charCodeAt(state.position))) state.position++;
	const name = state.input.slice(nameStart, state.position);
	const args = [];
	if (name.length === 0) throwError(state, "directive name must not be less than one character in length");
	while (state.input.charCodeAt(state.position) !== 0 && !isEol(state.input.charCodeAt(state.position))) {
		while (isWhiteSpace(state.input.charCodeAt(state.position))) state.position++;
		if (state.input.charCodeAt(state.position) === 35 || isEol(state.input.charCodeAt(state.position)) || state.input.charCodeAt(state.position) === 0) break;
		const start = state.position;
		while (state.input.charCodeAt(state.position) !== 0 && !isWsOrEol(state.input.charCodeAt(state.position))) state.position++;
		args.push(state.input.slice(start, state.position));
	}
	if (isEol(state.input.charCodeAt(state.position))) consumeLineBreak(state);
	if (name === "YAML") {
		if (state.directives.some((directive) => directive.kind === "yaml")) throwError(state, "duplication of %YAML directive");
		if (args.length !== 1) throwError(state, "YAML directive accepts exactly one argument");
		const match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]);
		if (match === null) throwError(state, "ill-formed argument of the YAML directive");
		if (parseInt(match[1], 10) !== 1) throwError(state, "unacceptable YAML version of the document");
		state.directives.push({
			kind: "yaml",
			version: args[0]
		});
	} else if (name === "TAG") {
		if (args.length !== 2) throwError(state, "TAG directive accepts exactly two arguments");
		const [handle, prefix] = args;
		if (!PATTERN_TAG_HANDLE.test(handle)) throwError(state, "ill-formed tag handle (first argument) of the TAG directive");
		if (HAS_OWN.call(state.tagHandlers, handle)) throwError(state, `there is a previously declared suffix for "${handle}" tag handle`);
		if (!PATTERN_TAG_PREFIX.test(prefix)) throwError(state, "ill-formed tag prefix (second argument) of the TAG directive");
		state.tagHandlers[handle] = prefix;
		state.directives.push({
			kind: "tag",
			handle,
			prefix
		});
	}
	return true;
}
function readDocument(state) {
	state.directives = [];
	state.tagHandlers = Object.create(null);
	let hasDirectives = false;
	skipSeparationSpace(state, true);
	while (readDirective(state)) {
		hasDirectives = true;
		skipSeparationSpace(state, true);
	}
	let explicitStart = false;
	let explicitEnd = false;
	let allowCompact = true;
	if (state.lineIndent === 0 && state.input.charCodeAt(state.position) === 45 && state.input.charCodeAt(state.position + 1) === 45 && state.input.charCodeAt(state.position + 2) === 45 && isWsOrEolOrEnd(state.input.charCodeAt(state.position + 3))) {
		explicitStart = true;
		const markerLine = state.line;
		state.position += 3;
		skipSeparationSpace(state, true);
		allowCompact = state.line > markerLine;
	} else if (hasDirectives) throwError(state, "directives end mark is expected");
	const documentEventIndex = state.events.length;
	if (!explicitStart && state.position === state.lineStart && state.input.charCodeAt(state.position) === 46 && testDocumentSeparator(state)) {
		state.position += 3;
		skipSeparationSpace(state, true);
		return;
	}
	addDocumentEvent(state, explicitStart, false);
	if (!parseNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, allowCompact, allowCompact)) addEmptyScalarEvent(state);
	skipSeparationSpace(state, true);
	if (state.position === state.lineStart && testDocumentSeparator(state)) {
		explicitEnd = state.input.charCodeAt(state.position) === 46;
		if (explicitEnd) {
			const markerLine = state.line;
			state.position += 3;
			skipSeparationSpace(state, true);
			if (state.line === markerLine && state.position < state.length) throwError(state, "end of the stream or a document separator is expected");
		}
	}
	const documentEvent = state.events[documentEventIndex];
	if ((documentEvent === null || documentEvent === void 0 ? void 0 : documentEvent.type) === EVENT_ID.DOCUMENT) documentEvent.explicitEnd = explicitEnd;
	addPopEvent(state);
	if (!explicitEnd && state.position < state.length && !testDocumentBoundary(state)) throwError(state, "end of the stream or a document separator is expected");
}
/**
* Parses YAML into a flat event stream referencing source text by offsets.
*
* @category Events
*/
function parseEvents(input, options) {
	const length = input.length;
	const state = _objectSpread2(_objectSpread2(_objectSpread2({}, DEFAULT_PARSER_OPTIONS), options), {}, {
		input: `${input}\0`,
		length,
		position: 0,
		line: 0,
		lineStart: 0,
		lineIndent: 0,
		firstTabInLine: -1,
		depth: 0,
		directives: [],
		tagHandlers: Object.create(null),
		events: []
	});
	const nullpos = input.indexOf("\0");
	if (nullpos !== -1) YAMLException.throwAt(input, nullpos, "null byte is not allowed in input", state.filename);
	while (state.position < state.length) {
		skipByteOrderMark(state);
		skipSeparationSpace(state, true);
		if (state.position >= state.length) break;
		const documentStart = state.position;
		readDocument(state);
		if (state.position === documentStart)
 /* c8 ignore next */
		throwError(state, "can not read a document");
	}
	return state.events;
}
//#endregion
//#region src/load.ts
var DEFAULT_LOAD_OPTIONS = _objectSpread2(_objectSpread2({}, DEFAULT_PARSER_OPTIONS), DEFAULT_CONSTRUCTOR_OPTIONS);
function loadDocuments(input, options = {}) {
	const opts = _objectSpread2(_objectSpread2({}, DEFAULT_LOAD_OPTIONS), options);
	const source = String(input);
	const PARSER_OPT_KEYS = Object.keys(DEFAULT_PARSER_OPTIONS);
	const CONSTRUCTOR_OPT_KEYS = Object.keys(DEFAULT_CONSTRUCTOR_OPTIONS);
	return constructFromEvents(parseEvents(source, pick(opts, PARSER_OPT_KEYS)), _objectSpread2(_objectSpread2({}, pick(opts, CONSTRUCTOR_OPT_KEYS)), {}, { source }));
}
function loadAll(input, iteratorOrOptions, options) {
	let iterator = null;
	if (typeof iteratorOrOptions === "function") iterator = iteratorOrOptions;
	else if (iteratorOrOptions !== null && typeof iteratorOrOptions === "object") options = iteratorOrOptions;
	const documents = loadDocuments(input, options);
	if (iterator === null) return documents;
	for (const document of documents) iterator(document);
}
/**
* Parses `string` as a single YAML document. Throws {@link YAMLException} on
* error. This function does not understand multi-document or empty sources; it
* throws an exception on those.
*
* > [!NOTE]
* > 1. When processing untrusted input, see the
* >    [security considerations](../docs/safety.md).
* > 2. All exceptions MUST be caught, not just {@link YAMLException}.
* > 3. The default {@link CORE_SCHEMA} comes without the `!!merge` tag. You can
* >    easily enable it if needed.
* > 4. The default {@link mapTag} is `{}`-object based, with known limitations
* >    (see description). For full compatibility use {@link realMapTag}
* >    instead (it uses native JS `Map`).
*
* @example
* Enable {@link mergeTag} and {@link realMapTag}:
*
* ```javascript
* import { load, CORE_SCHEMA, mergeTag, realMapTag } from 'js-yaml'
*
* try {
*   load(data, { schema: CORE_SCHEMA.withTags(mergeTag, realMapTag) })
* } catch (e) {
*   console.error(e)
* }
* ```
*
* @category Main
*/
function load(input, options) {
	const documents = loadDocuments(input, options);
	if (documents.length === 0) throw new YAMLException("expected a document, but the input is empty");
	if (documents.length === 1) return documents[0];
	throw new YAMLException("expected a single document in the stream, but found more");
}
//#endregion
//#region src/ast/from_js.ts
var INVALID = Symbol("INVALID");
function buildRepresentTypes(schema) {
	const defaultTags = new Set([
		schema.defaultScalarTag,
		schema.defaultSequenceTag,
		schema.defaultMappingTag
	].filter((t) => t !== void 0));
	const implicitScalars = schema.implicitScalarTags;
	const explicitTags = schema.tags.filter((t) => !(t.nodeKind === "scalar" && t.implicit) && !defaultTags.has(t));
	const defaultTagsLast = schema.tags.filter((t) => defaultTags.has(t));
	return [
		...implicitScalars.map((tag) => ({
			tag,
			implicitTag: true
		})),
		...explicitTags.map((tag) => ({
			tag,
			implicitTag: false
		})),
		...defaultTagsLast.map((tag) => ({
			tag,
			implicitTag: true
		}))
	];
}
function matchTag(state, object) {
	for (let index = 0, length = state.representTypes.length; index < length; index += 1) {
		const { tag, implicitTag } = state.representTypes[index];
		if (tag.identify(object)) {
			let tagName;
			if (tag.matchByTagPrefix) tagName = tag.representTagName(object);
			else tagName = tag.tagName;
			return {
				tag,
				tagName,
				implicitTag
			};
		}
	}
	return null;
}
function build(state, object) {
	if (!state.noRefs && object !== null && typeof object === "object") {
		const existing = state.refs.get(object);
		if (existing) {
			if (existing.anchor === void 0) existing.anchor = `ref_${state.refCounter++}`;
			return {
				kind: "alias",
				anchor: existing.anchor
			};
		}
	}
	const matched = matchTag(state, object);
	if (!matched) {
		if (object === void 0) return INVALID;
		if (state.skipInvalid) return INVALID;
		throw new YAMLException(`unacceptable kind of an object to dump ${Object.prototype.toString.call(object)}`);
	}
	const { tag, tagName, implicitTag } = matched;
	const nodeTagName = implicitTag ? tagName : tagNameShort(tagName);
	if (tag.nodeKind === "scalar") return {
		kind: "scalar",
		tag: nodeTagName,
		tagged: !implicitTag,
		style: SCALAR_STYLE.PLAIN,
		value: tag.represent(object)
	};
	if (tag.nodeKind === "sequence") {
		const container = tag.represent(object);
		const node = {
			kind: "sequence",
			tag: nodeTagName,
			tagged: !implicitTag,
			style: COLLECTION_STYLE.BLOCK,
			items: []
		};
		if (!state.noRefs) state.refs.set(object, node);
		for (let index = 0, length = container.length; index < length; index += 1) {
			let item = build(state, container[index]);
			if (item === INVALID && container[index] === void 0) item = build(state, null);
			if (item === INVALID) continue;
			node.items.push(item);
		}
		return node;
	}
	const map = tag.represent(object);
	const node = {
		kind: "mapping",
		tag: nodeTagName,
		tagged: !implicitTag,
		style: COLLECTION_STYLE.BLOCK,
		items: []
	};
	if (!state.noRefs) state.refs.set(object, node);
	for (const [objectKey, objectValue] of map) {
		const key = build(state, objectKey);
		if (key === INVALID) continue;
		const value = build(state, objectValue);
		if (value === INVALID) continue;
		node.items.push({
			key,
			value
		});
	}
	return node;
}
/**
* Convert JS object to AST. A JS value is one YAML document. An unrepresentable
* root becomes an empty document, which the presenter renders as an empty
* string.
*
* @category AST
*/
function jsToAst(input, schema, options = {}) {
	var _options$noRefs, _options$skipInvalid;
	const root = build({
		representTypes: buildRepresentTypes(schema),
		noRefs: (_options$noRefs = options.noRefs) !== null && _options$noRefs !== void 0 ? _options$noRefs : false,
		skipInvalid: (_options$skipInvalid = options.skipInvalid) !== null && _options$skipInvalid !== void 0 ? _options$skipInvalid : false,
		refs: /* @__PURE__ */ new Map(),
		refCounter: 0
	}, input);
	return [{
		contents: root === INVALID ? null : root,
		directives: []
	}];
}
//#endregion
//#region src/ast/visit.ts
/**
* Return from a visitor to stop the whole traversal.
*
* @category AST
*/
var VISIT_BREAK = Symbol("visit:break");
/**
* Return from a visitor to skip the current node's children.
*
* @category AST
*/
var VISIT_SKIP = Symbol("visit:skip");
function visitNode(node, visitor, ctx) {
	const control = visitor(node, ctx);
	if (control === VISIT_BREAK) return true;
	if (control === VISIT_SKIP) return false;
	const depth = ctx.depth + 1;
	switch (node.kind) {
		case "sequence":
			for (const item of node.items) if (visitNode(item, visitor, {
				depth,
				parent: node,
				isKey: false
			})) return true;
			break;
		case "mapping":
			for (const { key, value } of node.items) {
				if (visitNode(key, visitor, {
					depth,
					parent: node,
					isKey: true
				})) return true;
				if (visitNode(value, visitor, {
					depth,
					parent: node,
					isKey: false
				})) return true;
			}
			break;
	}
	return false;
}
/**
* Walk every node in the documents, calling {@link Visitor} once per
* node (pre-order).
*
* @category AST
*/
function visit(documents, visitor) {
	for (const doc of documents) if (doc.contents && visitNode(doc.contents, visitor, {
		depth: 0,
		parent: null,
		isKey: false
	})) return;
}
//#endregion
//#region src/ast/styler_defaults.ts
function hasBit(mask, bit) {
	return (mask & 1 << bit) !== 0;
}
/**
* Default scalar styling rules in application order.
* See [Scalar styling](../../docs/scalar_styling.md) for usage details.
*
* @category AST
*/
var DEFAULT_SCALAR_STYLE_RULES = {
	applyQuoteFlowKeysOption,
	doubleQuoteForInvisibles,
	doubleQuoteWhitespaceOnly,
	applyForceQuotesOption,
	tryLongOrMultilineAsBlock,
	quoteInvalidPlain,
	fallbackToDoubleQuoted
};
function _preferredQuotedStyle(layout) {
	if (layout.presenterOptions.quoteStyle === "single" && hasBit(layout.allowedStylesMask, SCALAR_STYLE.SINGLE_QUOTED)) return SCALAR_STYLE.SINGLE_QUOTED;
	return SCALAR_STYLE.DOUBLE_QUOTED;
}
function applyQuoteFlowKeysOption(layout) {
	if (!layout.presenterOptions.quoteFlowKeys) return;
	if (!layout.isKey || !layout.flowOnly || layout.style !== SCALAR_STYLE.PLAIN) return;
	layout.style = SCALAR_STYLE.DOUBLE_QUOTED;
}
function doubleQuoteForInvisibles(layout) {
	if (layout.style === SCALAR_STYLE.PLAIN && /[\t\x7F-\xA0\u2028\u2029\uFEFF\uFFFE\uFFFF]/.test(layout.node.value)) layout.style = SCALAR_STYLE.DOUBLE_QUOTED;
}
function doubleQuoteWhitespaceOnly(layout) {
	if (layout.style === SCALAR_STYLE.PLAIN && /^\s+$/.test(layout.node.value)) layout.style = SCALAR_STYLE.DOUBLE_QUOTED;
}
function applyForceQuotesOption(layout) {
	if (!layout.presenterOptions.forceQuotes) return;
	if (layout.isKey || layout.style !== SCALAR_STYLE.PLAIN) return;
	layout.style = layout.node.value.includes("\n") ? SCALAR_STYLE.DOUBLE_QUOTED : _preferredQuotedStyle(layout);
}
function tryLongOrMultilineAsBlock(layout) {
	if (layout.style !== SCALAR_STYLE.PLAIN || layout.isKey) return;
	const value = layout.node.value;
	const multiline = value.indexOf("\n") !== -1;
	if (!hasBit(layout.allowedStylesMask, SCALAR_STYLE.LITERAL_BLOCK)) {
		if (multiline) layout.style = SCALAR_STYLE.DOUBLE_QUOTED;
		return;
	}
	const w = layout.presenterOptions.lineWidth;
	if (w === -1) {
		if (multiline) layout.style = SCALAR_STYLE.LITERAL_BLOCK;
		return;
	}
	const availableWidth = Math.max(Math.min(w, 40), w - layout.shiftOfContent);
	let position = 0;
	let shouldFold = false;
	while (position <= value.length) {
		let lineEnd = value.length;
		const nextLineBreak = value.indexOf("\n", position);
		if (nextLineBreak !== -1) lineEnd = nextLineBreak;
		const line = value.slice(position, lineEnd);
		if (line.length > availableWidth && line[0] !== " " && / [^ \t]/.test(line)) shouldFold = true;
		if (nextLineBreak === -1) break;
		position = nextLineBreak + 1;
	}
	if (shouldFold) layout.style = SCALAR_STYLE.FOLDED_BLOCK;
	else if (multiline) layout.style = SCALAR_STYLE.LITERAL_BLOCK;
}
function quoteInvalidPlain(layout) {
	if (layout.style === SCALAR_STYLE.PLAIN && !hasBit(layout.allowedStylesMask, SCALAR_STYLE.PLAIN)) layout.style = _preferredQuotedStyle(layout);
}
function fallbackToDoubleQuoted(layout) {
	if (!hasBit(layout.allowedStylesMask, layout.style)) layout.style = SCALAR_STYLE.DOUBLE_QUOTED;
}
//#endregion
//#region src/ast/scalar_styler.ts
function setBit(mask, bit) {
	return mask | 1 << bit;
}
var SRC_C_PRINTABLE = "[\\x09\\x0A\\x0D\\x20-\\x7E\\x85\\xA0-\\uD7FF\\uE000-\\uFFFD\\u{10000}-\\u{10FFFF}]";
var SRC_B_CHAR = "[\\n\\r]";
var SRC_C_BYTE_ORDER_MARK = "\\uFEFF";
var SRC_S_WHITE = "[ \\t]";
var SRC_NB_CHAR = `(?:(?!(?:${SRC_B_CHAR}|${SRC_C_BYTE_ORDER_MARK}))${SRC_C_PRINTABLE})`;
var SRC_NS_CHAR = `(?:(?!${SRC_S_WHITE})${SRC_NB_CHAR})`;
var SRC_NB_JSON = "[\\x09\\x20-\\uD7FF\\uE000-\\uFFFF\\u{10000}-\\u{10FFFF}]";
var SRC_C_INDICATOR = "[-?:,\\[\\]{}#&*!|>'\"%@`]";
var SRC_C_FLOW_INDICATOR = "[,\\[\\]{}]";
var SRC_NS_PLAIN_SAFE_FLOW_OUT = SRC_NS_CHAR;
var SRC_NS_PLAIN_SAFE_FLOW_IN = `(?:(?!${SRC_C_FLOW_INDICATOR})${SRC_NS_CHAR})`;
var SRC_NS_PLAIN_FIRST_FLOW_OUT = `(?:(?:(?!${SRC_C_INDICATOR})${SRC_NS_CHAR})|[?:-](?=${SRC_NS_PLAIN_SAFE_FLOW_OUT}))`;
var SRC_NS_PLAIN_FIRST_FLOW_IN = `(?:(?:(?!${SRC_C_INDICATOR})${SRC_NS_CHAR})|[?:-](?=${SRC_NS_PLAIN_SAFE_FLOW_IN}))`;
var SRC_NS_PLAIN_CHAR_FLOW_OUT = `(?:(?:(?![:#])${SRC_NS_PLAIN_SAFE_FLOW_OUT})|:(?=${SRC_NS_PLAIN_SAFE_FLOW_OUT}))#*`;
var SRC_NS_PLAIN_CHAR_FLOW_IN = `(?:(?:(?![:#])${SRC_NS_PLAIN_SAFE_FLOW_IN})|:(?=${SRC_NS_PLAIN_SAFE_FLOW_IN}))#*`;
var SRC_NB_NS_PLAIN_IN_LINE_FLOW_OUT = `(?:${SRC_S_WHITE}*${SRC_NS_PLAIN_CHAR_FLOW_OUT})*`;
var SRC_NB_NS_PLAIN_IN_LINE_FLOW_IN = `(?:${SRC_S_WHITE}*${SRC_NS_PLAIN_CHAR_FLOW_IN})*`;
var SRC_NS_PLAIN_ONE_LINE_FLOW_OUT = `${SRC_NS_PLAIN_FIRST_FLOW_OUT}#*${SRC_NB_NS_PLAIN_IN_LINE_FLOW_OUT}`;
var SRC_NS_PLAIN_ONE_LINE_FLOW_IN = `${SRC_NS_PLAIN_FIRST_FLOW_IN}#*${SRC_NB_NS_PLAIN_IN_LINE_FLOW_IN}`;
var SRC_NS_PLAIN_ONE_LINE_BLOCK_KEY = SRC_NS_PLAIN_ONE_LINE_FLOW_OUT;
var SRC_NS_PLAIN_ONE_LINE_FLOW_KEY = SRC_NS_PLAIN_ONE_LINE_FLOW_IN;
var SRC_S_NS_PLAIN_NEXT_LINE_FLOW_OUT = `\\n+${SRC_NS_PLAIN_CHAR_FLOW_OUT}${SRC_NB_NS_PLAIN_IN_LINE_FLOW_OUT}`;
var SRC_S_NS_PLAIN_NEXT_LINE_FLOW_IN = `\\n+${SRC_NS_PLAIN_CHAR_FLOW_IN}${SRC_NB_NS_PLAIN_IN_LINE_FLOW_IN}`;
var SRC_NS_PLAIN_MULTI_LINE_FLOW_OUT = `${SRC_NS_PLAIN_ONE_LINE_FLOW_OUT}(?:${SRC_S_NS_PLAIN_NEXT_LINE_FLOW_OUT})*`;
var SRC_NS_PLAIN_MULTI_LINE_FLOW_IN = `${SRC_NS_PLAIN_ONE_LINE_FLOW_IN}(?:${SRC_S_NS_PLAIN_NEXT_LINE_FLOW_IN})*`;
var NS_PLAIN_FLOW_OUT = new RegExp(`^(?:${SRC_NS_PLAIN_MULTI_LINE_FLOW_OUT})$`, "u");
var NS_PLAIN_FLOW_IN = new RegExp(`^(?:${SRC_NS_PLAIN_MULTI_LINE_FLOW_IN})$`, "u");
var NS_PLAIN_BLOCK_KEY = new RegExp(`^(?:${SRC_NS_PLAIN_ONE_LINE_BLOCK_KEY})$`, "u");
var NS_PLAIN_FLOW_KEY = new RegExp(`^(?:${SRC_NS_PLAIN_ONE_LINE_FLOW_KEY})$`, "u");
var NB_SINGLE_ONE_LINE = new RegExp(`^(?:${SRC_NB_JSON})*$`, "u");
var NB_SINGLE_MULTI_LINE = new RegExp(`^(?:${SRC_NB_JSON}|\\n)*$`, "u");
var BLOCK_SCALAR_CONTENT = new RegExp(`^(?:${SRC_NB_CHAR}|\\n)*$`, "u");
var C_FORBIDDEN_FIRST_LINE = /^(?:---|\.\.\.)(?=$|[ \t\n\r])/;
var C_FORBIDDEN_CONTENT = /^(?:---|\.\.\.)(?=$|[ \t\n\r])/m;
function canUsePlain(layout) {
	const str = layout.node.value;
	if (str !== "") {
		if (!(layout.isKey ? layout.flowOnly ? NS_PLAIN_FLOW_KEY : NS_PLAIN_BLOCK_KEY : layout.flowOnly ? NS_PLAIN_FLOW_IN : NS_PLAIN_FLOW_OUT).test(str)) return false;
		if (layout.shiftOfFirstLine === 0 && C_FORBIDDEN_FIRST_LINE.test(str)) return false;
		if (layout.shiftOfContent === 0) {
			const firstLineBreak = str.indexOf("\n");
			if (firstLineBreak !== -1) {
				const content = str.slice(firstLineBreak + 1);
				if (C_FORBIDDEN_CONTENT.test(content)) return false;
			}
		}
	}
	const resolvedTag = layout.presenterOptions.schema.resolveImplicitScalarTag(str).tag.tagName;
	if (!layout.node.tagged && resolvedTag !== layout.node.tag) return false;
	if (!layout.node.tagged && str === "=" && resolvedTag === layout.presenterOptions.schema.defaultScalarTag.tagName) return false;
	return true;
}
function canUseSingleQuoted(layout) {
	const str = layout.node.value;
	if (!(layout.isKey ? NB_SINGLE_ONE_LINE : NB_SINGLE_MULTI_LINE).test(str)) return false;
	if (/[ \t]\n|\n[ \t]/.test(str)) return false;
	if (!layout.isKey && layout.shiftOfContent === 0) {
		const firstLineBreak = str.indexOf("\n");
		if (firstLineBreak !== -1 && C_FORBIDDEN_CONTENT.test(str.slice(firstLineBreak + 1))) return false;
	}
	return true;
}
function canUseBlock(layout) {
	if (layout.flowOnly || !BLOCK_SCALAR_CONTENT.test(layout.node.value)) return false;
	const contentIndent = layout.shiftOfContent - layout.shiftOfParent;
	if (contentIndent < 1) return false;
	if (contentIndent > 9 && /^\n* /.test(layout.node.value)) return false;
	if (layout.shiftOfContent === 0 && C_FORBIDDEN_CONTENT.test(layout.node.value)) return false;
	return true;
}
function detectAllowedStyles(layout) {
	let mask = setBit(0, SCALAR_STYLE.DOUBLE_QUOTED);
	if (canUsePlain(layout)) mask = setBit(mask, SCALAR_STYLE.PLAIN);
	if (canUseSingleQuoted(layout)) mask = setBit(mask, SCALAR_STYLE.SINGLE_QUOTED);
	if (canUseBlock(layout)) mask = setBit(setBit(mask, SCALAR_STYLE.LITERAL_BLOCK), SCALAR_STYLE.FOLDED_BLOCK);
	layout.allowedStylesMask = mask;
}
function renderScalar(layout) {
	switch (layout.style) {
		case SCALAR_STYLE.PLAIN: return renderPlain(layout);
		case SCALAR_STYLE.SINGLE_QUOTED: return renderSingleQuoted(layout);
		case SCALAR_STYLE.LITERAL_BLOCK: return renderLiteralBlock(layout);
		case SCALAR_STYLE.FOLDED_BLOCK: return renderFoldedBlock(layout);
		case SCALAR_STYLE.DOUBLE_QUOTED: return renderDoubleQuoted(layout);
	}
}
function renderPlain(layout) {
	return encodeFlowBreaks(layout.node.value, layout.shiftOfContent);
}
function renderSingleQuoted(layout) {
	return `'${encodeFlowBreaks(layout.node.value, layout.shiftOfContent).replace(/'/g, "''")}'`;
}
function renderLiteralBlock(layout) {
	const value = layout.node.value;
	return "|" + blockHeader(value, layout.shiftOfParent, layout.shiftOfContent) + dropEndingNewline(indentString(value, layout.shiftOfContent));
}
function renderFoldedBlock(layout) {
	const value = layout.node.value;
	const w = layout.presenterOptions.lineWidth;
	let availableWidth = Infinity;
	if (w !== -1) availableWidth = Math.max(Math.min(w, 40), w - layout.shiftOfContent);
	return ">" + blockHeader(value, layout.shiftOfParent, layout.shiftOfContent) + dropEndingNewline(indentString(foldBlockScalar(value, availableWidth), layout.shiftOfContent));
}
function renderDoubleQuoted(layout) {
	return `"${escapeString(layout.node.value)}"`;
}
function encodeFlowBreaks(string, shiftOfContent) {
	let nextLF = string.indexOf("\n");
	if (nextLF === -1) return string;
	const pad = " ".repeat(shiftOfContent);
	let result = string.slice(0, nextLF);
	const lineRe = /(\n+)([^\n]*)/g;
	lineRe.lastIndex = nextLF;
	let match;
	while (match = lineRe.exec(string)) {
		const breaks = match[1].length;
		const line = match[2];
		result += "\n".repeat(breaks + 1) + pad + line;
	}
	return result;
}
function indentString(string, spaces) {
	const indent = " ".repeat(spaces);
	let position = 0;
	let result = "";
	const length = string.length;
	while (position < length) {
		let line;
		const next = string.indexOf("\n", position);
		if (next === -1) {
			line = string.slice(position);
			position = length;
		} else {
			line = string.slice(position, next + 1);
			position = next + 1;
		}
		if (line.length && line !== "\n") result += indent;
		result += line;
	}
	return result;
}
function needIndentIndicator(string) {
	return /^\n* /.test(string);
}
function blockHeader(string, shiftOfParent, shiftOfContent) {
	const indentIndicator = needIndentIndicator(string) ? String(shiftOfContent - shiftOfParent) : "";
	const clip = string[string.length - 1] === "\n";
	return `${indentIndicator}${clip && (string[string.length - 2] === "\n" || string === "\n") ? "+" : clip ? "" : "-"}\n`;
}
function dropEndingNewline(string) {
	return string[string.length - 1] === "\n" ? string.slice(0, -1) : string;
}
function isMoreIndented(char) {
	return char === " " || char === "	";
}
function foldLine(line, width) {
	if (line === "" || isMoreIndented(line[0])) return line;
	const breakRe = / [^ \t]/g;
	let match;
	let start = 0;
	let end;
	let curr = 0;
	let next = 0;
	let result = "";
	while (match = breakRe.exec(line)) {
		next = match.index;
		if (next - start > width) {
			end = curr > start ? curr : next;
			result += `\n${line.slice(start, end)}`;
			start = end + 1;
		}
		curr = next;
	}
	result += "\n";
	if (line.length - start > width && curr > start) result += `${line.slice(start, curr)}\n${line.slice(curr + 1)}`;
	else result += line.slice(start);
	return result.slice(1);
}
function foldBlockScalar(string, width) {
	const lineRe = /(\n+)([^\n]*)/g;
	let nextLF = string.indexOf("\n");
	if (nextLF === -1) nextLF = string.length;
	lineRe.lastIndex = nextLF;
	let result = foldLine(string.slice(0, nextLF), width);
	let prevMoreIndented = string[0] === "\n" || isMoreIndented(string[0]);
	let moreIndented;
	let match;
	while (match = lineRe.exec(string)) {
		const prefix = match[1];
		const line = match[2];
		moreIndented = line !== "" && isMoreIndented(line[0]);
		result += prefix + (!prevMoreIndented && !moreIndented && line !== "" ? "\n" : "") + foldLine(line, width);
		prevMoreIndented = moreIndented;
	}
	return result;
}
var CHARACTERS_TO_ESCAPE = /["\\\x00-\x1F\x7F-\xA0\u2028\u2029\uD800-\uDFFF\uFEFF\uFFFE\uFFFF]/gu;
function escapeCharacter(character) {
	switch (character) {
		case "\0": return "\\0";
		case "\x07": return "\\a";
		case "\b": return "\\b";
		case "	": return "\\t";
		case "\n": return "\\n";
		case "\v": return "\\v";
		case "\f": return "\\f";
		case "\r": return "\\r";
		case "\x1B": return "\\e";
		case "\"": return "\\\"";
		case "\\": return "\\\\";
		case "": return "\\N";
		case "\xA0": return "\\_";
		case "\u2028": return "\\L";
		case "\u2029": return "\\P";
	}
	const code = character.charCodeAt(0);
	const hex = code.toString(16).toUpperCase();
	if (code <= 255) return `\\x${"0".repeat(2 - hex.length)}${hex}`;
	return `\\u${"0".repeat(4 - hex.length)}${hex}`;
}
function escapeString(string) {
	return string.replace(CHARACTERS_TO_ESCAPE, escapeCharacter);
}
//#endregion
//#region src/ast/presenter.ts
var CHAR_LINE_FEED = 10;
var DEFAULT_PRESENTER_OPTIONS = {
	indent: 2,
	seqNoIndent: false,
	seqInlineFirst: true,
	lineWidth: 80,
	flowBracketPadding: false,
	flowSkipCommaSpace: false,
	flowSkipColonSpace: false,
	quoteFlowKeys: false,
	quoteStyle: "single",
	forceQuotes: false,
	scalarStyleRules: Object.keys(DEFAULT_SCALAR_STYLE_RULES).map((name) => Reflect.get(DEFAULT_SCALAR_STYLE_RULES, name)),
	tagBeforeAnchor: false
};
function nodeTagShort(node) {
	return node.tagged ? node.tag : tagNameShort(node.tag);
}
function createPresenterState(options) {
	const opts = _objectSpread2(_objectSpread2({}, DEFAULT_PRESENTER_OPTIONS), options);
	if (opts.flowSkipColonSpace) opts.quoteFlowKeys = true;
	return _objectSpread2(_objectSpread2({}, opts), {}, {
		defaultScalarTagName: opts.schema.defaultScalarTag.tagName,
		openEnded: false
	});
}
function generateNextLine(state, level) {
	return `\n${" ".repeat(state.indent * level)}`;
}
function scalarLayout(state, node, parent, level, isKey, flowOnly) {
	return {
		node,
		parent,
		level,
		isKey,
		flowOnly,
		shiftOfParent: level === 0 ? -1 : state.indent * (level - 1),
		shiftOfContent: state.indent * Math.max(1, level),
		shiftOfFirstLine: level === 0 ? 0 : state.indent * level,
		presenterOptions: state,
		allowedStylesMask: 0,
		style: node.style
	};
}
function writeFlowSequence(state, level, node) {
	let result = "";
	for (let index = 0, length = node.items.length; index < length; index += 1) {
		const item = writeNode(state, level, node.items[index], node, {}).text;
		if (index > 0) result += `,${!state.flowSkipCommaSpace ? " " : ""}`;
		result += item;
	}
	const pad = state.flowBracketPadding && node.items.length > 0 ? " " : "";
	return `[${pad}${result}${pad}]`;
}
function writeBlockSequence(state, level, node, compact) {
	let result = "";
	for (let index = 0, length = node.items.length; index < length; index += 1) {
		const item = writeNode(state, level + 1, node.items[index], node, {
			block: true,
			compact: state.seqInlineFirst,
			isblockseq: true
		}).text;
		if (!compact || result !== "") result += generateNextLine(state, level);
		if (item === "" || CHAR_LINE_FEED === item.charCodeAt(0)) result += "-";
		else result += "- ";
		result += item;
	}
	return result;
}
function writeFlowMapping(state, level, node) {
	let result = "";
	for (const { key, value } of node.items) {
		let pairBuffer = "";
		if (result !== "") pairBuffer += `,${!state.flowSkipCommaSpace ? " " : ""}`;
		const keyRender = writeNode(state, level, key, node, { iskey: true });
		const keyText = keyRender.text;
		const valueText = writeNode(state, level, value, node, {}).text;
		const sep = state.flowSkipColonSpace || valueText === "" ? "" : " ";
		const keyIsBareProps = key.kind === "scalar" && keyRender.noBody && (key.tagged || key.anchor !== void 0);
		const keyColonSep = key.kind === "alias" || keyIsBareProps ? " " : "";
		pairBuffer += `${keyText}${keyColonSep}:${sep}${valueText}`;
		result += pairBuffer;
	}
	const pad = state.flowBracketPadding && result !== "" ? " " : "";
	return `{${pad}${result}${pad}}`;
}
function writeBlockMapping(state, level, node, compact) {
	let result = "";
	for (let index = 0, length = node.items.length; index < length; index += 1) {
		let pairBuffer = "";
		if (!compact || result !== "") pairBuffer += generateNextLine(state, level);
		const { key, value } = node.items[index];
		const keyIsBlock = (key.kind === "mapping" || key.kind === "sequence") && key.style === COLLECTION_STYLE.BLOCK && key.items.length !== 0 || key.kind === "scalar" && (key.style === SCALAR_STYLE.LITERAL_BLOCK || key.style === SCALAR_STYLE.FOLDED_BLOCK);
		const keyRender = keyIsBlock ? writeNode(state, level + 1, key, node, {
			block: true,
			compact: true,
			isblockseq: !cannotBeCompact(state, key, level + 1)
		}) : writeNode(state, level + 1, key, node, {
			block: true,
			compact: true,
			iskey: true
		});
		const keyText = keyRender.text;
		const keyHasLineBreak = key.kind === "scalar" && key.value.indexOf("\n") !== -1;
		const keyIsTooLong = keyText.length > 1024 && /^[\s\S]{1025}/u.test(keyText);
		const explicitPair = keyIsBlock || keyHasLineBreak || keyIsTooLong;
		if (explicitPair) if (keyText && CHAR_LINE_FEED === keyText.charCodeAt(0)) pairBuffer += "?";
		else pairBuffer += "? ";
		pairBuffer += keyText;
		if (explicitPair) pairBuffer += generateNextLine(state, level);
		const valueText = writeNode(state, level + 1, value, node, {
			block: true,
			compact: explicitPair,
			isblockseq: explicitPair && !cannotBeCompact(state, value, level + 1)
		}).text;
		const keyIsBareProps = key.kind === "scalar" && keyRender.noBody && (key.tagged || key.anchor !== void 0);
		const keyColonSep = !explicitPair && (key.kind === "alias" || keyIsBareProps) ? " " : "";
		if (valueText === "" || CHAR_LINE_FEED === valueText.charCodeAt(0)) pairBuffer += `${keyColonSep}:`;
		else pairBuffer += `${keyColonSep}: `;
		pairBuffer += valueText;
		result += pairBuffer;
	}
	return result;
}
function cannotBeCompact(state, node, level) {
	if (node.kind === "alias") return true;
	return node.tagged || node.anchor !== void 0 || state.indent < 2 && level > 0;
}
function writeNode(state, level, node, parent, ctx) {
	var _ctx$compact;
	if (node.kind === "alias") {
		state.openEnded = false;
		return {
			text: `*${node.anchor}`,
			noBody: false
		};
	}
	const { block = false, iskey = false, isblockseq = false } = ctx;
	let compact = (_ctx$compact = ctx.compact) !== null && _ctx$compact !== void 0 ? _ctx$compact : false;
	const hasAnchor = node.anchor !== void 0;
	if (cannotBeCompact(state, node, level)) compact = false;
	let body;
	let shouldPrintTag = node.tagged;
	const useBlockCollection = block && (node.kind === "mapping" || node.kind === "sequence") && node.style === COLLECTION_STYLE.BLOCK && node.items.length !== 0;
	if (node.kind === "mapping") if (useBlockCollection) body = writeBlockMapping(state, level, node, compact);
	else body = writeFlowMapping(state, level, node);
	else if (node.kind === "sequence") if (useBlockCollection) if (state.seqNoIndent && !isblockseq && level > 0) body = writeBlockSequence(state, level - 1, node, compact);
	else body = writeBlockSequence(state, level, node, compact);
	else body = writeFlowSequence(state, level, node);
	else {
		const layout = scalarLayout(state, node, parent, level, iskey, !block);
		detectAllowedStyles(layout);
		for (const rule of state.scalarStyleRules) rule(layout);
		body = renderScalar(layout);
		state.openEnded = (layout.style === SCALAR_STYLE.LITERAL_BLOCK || layout.style === SCALAR_STYLE.FOLDED_BLOCK) && (node.value === "\n" || node.value.endsWith("\n\n"));
		shouldPrintTag = node.tagged || body === "" && layout.flowOnly && (parent === null || parent === void 0 ? void 0 : parent.kind) === "sequence" && !hasAnchor || layout.style !== SCALAR_STYLE.PLAIN && node.tag !== state.defaultScalarTagName;
	}
	if ((node.kind === "mapping" || node.kind === "sequence") && !useBlockCollection) state.openEnded = false;
	if (useBlockCollection && compact && level > 0 && state.indent > 2) body = `${" ".repeat(state.indent - 2)}${body}`;
	const noBody = body === "";
	let text = body;
	if (shouldPrintTag || hasAnchor) {
		const props = [];
		const tag = shouldPrintTag ? nodeTagShort(node) : null;
		const anchor = hasAnchor ? `&${node.anchor}` : null;
		if (state.tagBeforeAnchor) {
			if (tag !== null) props.push(tag);
			if (anchor !== null) props.push(anchor);
		} else {
			if (anchor !== null) props.push(anchor);
			if (tag !== null) props.push(tag);
		}
		const sep = body === "" || body.charCodeAt(0) === CHAR_LINE_FEED ? "" : " ";
		text = `${props.join(" ")}${sep}${body}`;
	}
	return {
		text,
		noBody
	};
}
function rootStartsOwnLine(node) {
	return (node.kind === "sequence" || node.kind === "mapping") && node.style === COLLECTION_STYLE.BLOCK && node.items.length !== 0 && !node.tagged && node.anchor === void 0;
}
function writeDocumentDirectives(doc) {
	let result = "";
	for (const directive of doc.directives) {
		if (directive.kind === "yaml") {
			result += `%YAML ${directive.version}\n`;
			continue;
		}
		const { handle, prefix } = directive;
		result += `%TAG ${handle} ${prefix}\n`;
	}
	return result;
}
/**
* Build YAML from AST.
*
* @category AST
*/
function present(documents, options) {
	const state = createPresenterState(options);
	let result = "";
	let previousEnded = false;
	for (let index = 0; index < documents.length; index += 1) {
		const doc = documents[index];
		state.openEnded = false;
		const directives = writeDocumentDirectives(doc);
		const hasDirectives = directives !== "";
		const marker = doc.explicitStart || hasDirectives || index > 0 && !previousEnded;
		result += directives;
		if (doc.contents === null) {
			if (marker) result += "---\n";
		} else if (marker) {
			const body = writeNode(state, 0, doc.contents, null, {
				block: true,
				compact: true
			}).text;
			const sep = body === "" ? "" : hasDirectives || rootStartsOwnLine(doc.contents) ? "\n" : " ";
			result += `---${sep}${body}\n`;
		} else result += writeNode(state, 0, doc.contents, null, {
			block: true,
			compact: true
		}).text + "\n";
		previousEnded = doc.explicitEnd || state.openEnded;
		if (previousEnded) result += "...\n";
	}
	return result;
}
//#endregion
//#region src/dump.ts
var DEFAULT_DUMP_OPTIONS = _objectSpread2(_objectSpread2({}, DEFAULT_PRESENTER_OPTIONS), {}, {
	schema: DUMP_SCHEMA,
	skipInvalid: false,
	noRefs: false,
	flowLevel: -1,
	sortKeys: false,
	transform: () => {}
});
function defaultCompareFn(a, b) {
	const x = String(a);
	const y = String(b);
	if (x < y) return -1;
	if (x > y) return 1;
	return 0;
}
/**
* Serializes JS object as a YAML document. By default it can dump every
* supported YAML type, so it throws an exception if you try to dump regexps or
* functions. However, you can disable exceptions by setting the
* {@link DumpOptions.skipInvalid} option to `true`.
*
* @category Main
*/
function dump(input, options = {}) {
	const opts = _objectSpread2(_objectSpread2({}, DEFAULT_DUMP_OPTIONS), options);
	const documents = jsToAst(input, opts.schema, {
		noRefs: opts.noRefs,
		skipInvalid: opts.skipInvalid
	});
	if (opts.flowLevel >= 0) visit(documents, (node, ctx) => {
		if (ctx.depth < opts.flowLevel) return;
		if (node.kind === "sequence" || node.kind === "mapping") node.style = COLLECTION_STYLE.FLOW;
		return VISIT_SKIP;
	});
	if (opts.sortKeys) {
		const compareFn = opts.sortKeys === true ? defaultCompareFn : opts.sortKeys;
		visit(documents, (node) => {
			if (node.kind !== "mapping") return;
			node.items.sort((a, b) => compareFn(a.key.kind === "scalar" ? a.key.value : "", b.key.kind === "scalar" ? b.key.value : ""));
		});
	}
	opts.transform(documents);
	return present(documents, _objectSpread2(_objectSpread2({}, pick(opts, Object.keys(DEFAULT_PRESENTER_OPTIONS))), {}, { schema: opts.schema }));
}
//#endregion
//#region src/ast/from_events.ts
var NO_RANGE = -1;
function eventPosition(event) {
	if ("tagStart" in event && event.tagStart !== NO_RANGE) return event.tagStart;
	if ("anchorStart" in event && event.anchorStart !== NO_RANGE) return event.anchorStart;
	if ("valueStart" in event && event.valueStart !== NO_RANGE) return event.valueStart;
	if ("start" in event) return event.start;
	return 0;
}
function rawTag(state, event) {
	return event.tagStart === NO_RANGE ? "" : state.source.slice(event.tagStart, event.tagEnd);
}
function anchorName(state, event) {
	return event.anchorStart === NO_RANGE ? void 0 : state.source.slice(event.anchorStart, event.anchorEnd);
}
function buildScalar(state, event) {
	const value = getScalarValue(state.source, event);
	const raw = rawTag(state, event);
	let tag;
	let tagged = false;
	if (raw !== "") {
		tagged = true;
		tag = raw;
	} else if (event.style === SCALAR_STYLE.PLAIN) tag = state.schema.resolveImplicitScalarTag(value).tag.tagName;
	else tag = state.schema.defaultScalarTag.tagName;
	return {
		kind: "scalar",
		tag,
		tagged,
		style: event.style,
		anchor: anchorName(state, event),
		value
	};
}
function buildCollection(state, event, defaultTagName) {
	const raw = rawTag(state, event);
	let tag;
	let tagged = false;
	if (raw === "") tag = defaultTagName;
	else {
		tag = raw;
		tagged = true;
	}
	return {
		tag,
		tagged,
		style: event.style,
		anchor: anchorName(state, event)
	};
}
function addNode(state, node) {
	const frame = state.frames[state.frames.length - 1];
	if (frame.kind === "document") frame.doc.contents = node;
	else if (frame.kind === "sequence") frame.node.items.push(node);
	else if (frame.key) {
		frame.node.items.push({
			key: frame.key,
			value: node
		});
		frame.key = null;
	} else frame.key = node;
}
/**
* Builds an AST from parser events
*
* @category AST
*/
function eventsToAst(events, options) {
	const state = {
		source: options.source,
		schema: options.schema,
		eventIndex: 0,
		position: 0,
		frames: [],
		documents: []
	};
	while (state.eventIndex < events.length) {
		const event = events[state.eventIndex++];
		state.position = eventPosition(event);
		switch (event.type) {
			case EVENT_ID.DOCUMENT: {
				const doc = {
					contents: null,
					explicitStart: event.explicitStart,
					explicitEnd: event.explicitEnd,
					directives: event.directives
				};
				state.frames.push({
					kind: "document",
					doc
				});
				break;
			}
			case EVENT_ID.SCALAR:
				addNode(state, buildScalar(state, event));
				break;
			case EVENT_ID.SEQUENCE: {
				const { tag, tagged, style, anchor } = buildCollection(state, event, "tag:yaml.org,2002:seq");
				const node = {
					kind: "sequence",
					tag,
					tagged,
					style,
					anchor,
					items: []
				};
				state.frames.push({
					kind: "sequence",
					node
				});
				break;
			}
			case EVENT_ID.MAPPING: {
				const { tag, tagged, style, anchor } = buildCollection(state, event, "tag:yaml.org,2002:map");
				const node = {
					kind: "mapping",
					tag,
					tagged,
					style,
					anchor,
					items: []
				};
				state.frames.push({
					kind: "mapping",
					node,
					key: null
				});
				break;
			}
			case EVENT_ID.ALIAS:
				addNode(state, {
					kind: "alias",
					anchor: state.source.slice(event.anchorStart, event.anchorEnd)
				});
				break;
			case EVENT_ID.POP: {
				const frame = state.frames.pop();
				if (frame.kind === "mapping" && frame.key) throw new Error("incomplete mapping pair in event stream");
				if (frame.kind === "document") state.documents.push(frame.doc);
				else addNode(state, frame.node);
				break;
			}
		}
	}
	return state.documents;
}
//#endregion
//#region src/index.ts
/** @deprecated Use `EVENT_ID.DOCUMENT` instead. @internal */
var EVENT_DOCUMENT = EVENT_ID.DOCUMENT;
/** @deprecated Use `EVENT_ID.SEQUENCE` instead. @internal */
var EVENT_SEQUENCE = EVENT_ID.SEQUENCE;
/** @deprecated Use `EVENT_ID.MAPPING` instead. @internal */
var EVENT_MAPPING = EVENT_ID.MAPPING;
/** @deprecated Use `EVENT_ID.SCALAR` instead. @internal */
var EVENT_SCALAR = EVENT_ID.SCALAR;
/** @deprecated Use `EVENT_ID.ALIAS` instead. @internal */
var EVENT_ALIAS = EVENT_ID.ALIAS;
/** @deprecated Use `EVENT_ID.POP` instead. @internal */
var EVENT_POP = EVENT_ID.POP;
/** @deprecated Use `SCALAR_STYLE.PLAIN` instead. @internal */
var SCALAR_STYLE_PLAIN = SCALAR_STYLE.PLAIN;
/** @deprecated Use `SCALAR_STYLE.SINGLE_QUOTED` instead. @internal */
var SCALAR_STYLE_SINGLE_QUOTED = SCALAR_STYLE.SINGLE_QUOTED;
/** @deprecated Use `SCALAR_STYLE.DOUBLE_QUOTED` instead. @internal */
var SCALAR_STYLE_DOUBLE_QUOTED = SCALAR_STYLE.DOUBLE_QUOTED;
/** @deprecated Use `SCALAR_STYLE.LITERAL_BLOCK` instead. @internal */
var SCALAR_STYLE_LITERAL_BLOCK = SCALAR_STYLE.LITERAL_BLOCK;
/** @deprecated Use `SCALAR_STYLE.FOLDED_BLOCK` instead. @internal */
var SCALAR_STYLE_FOLDED_BLOCK = SCALAR_STYLE.FOLDED_BLOCK;
/** @deprecated Use `COLLECTION_STYLE.BLOCK` instead. @internal */
var COLLECTION_STYLE_BLOCK = COLLECTION_STYLE.BLOCK;
/** @deprecated Use `COLLECTION_STYLE.FLOW` instead. @internal */
var COLLECTION_STYLE_FLOW = COLLECTION_STYLE.FLOW;
/** @deprecated Use `CHOMPING_MODE.CLIP` instead. @internal */
var CHOMPING_CLIP = CHOMPING_MODE.CLIP;
/** @deprecated Use `CHOMPING_MODE.STRIP` instead. @internal */
var CHOMPING_STRIP = CHOMPING_MODE.STRIP;
/** @deprecated Use `CHOMPING_MODE.KEEP` instead. @internal */
var CHOMPING_KEEP = CHOMPING_MODE.KEEP;
//#endregion
exports.CHOMPING_CLIP = CHOMPING_CLIP;
exports.CHOMPING_KEEP = CHOMPING_KEEP;
exports.CHOMPING_MODE = CHOMPING_MODE;
exports.CHOMPING_STRIP = CHOMPING_STRIP;
exports.COLLECTION_STYLE = COLLECTION_STYLE;
exports.COLLECTION_STYLE_BLOCK = COLLECTION_STYLE_BLOCK;
exports.COLLECTION_STYLE_FLOW = COLLECTION_STYLE_FLOW;
exports.CORE_SCHEMA = CORE_SCHEMA;
exports.DEFAULT_SCALAR_STYLE_RULES = DEFAULT_SCALAR_STYLE_RULES;
exports.DUMP_SCHEMA = DUMP_SCHEMA;
exports.EVENT_ALIAS = EVENT_ALIAS;
exports.EVENT_DOCUMENT = EVENT_DOCUMENT;
exports.EVENT_ID = EVENT_ID;
exports.EVENT_MAPPING = EVENT_MAPPING;
exports.EVENT_POP = EVENT_POP;
exports.EVENT_SCALAR = EVENT_SCALAR;
exports.EVENT_SEQUENCE = EVENT_SEQUENCE;
exports.FAILSAFE_SCHEMA = FAILSAFE_SCHEMA;
exports.JSON_SCHEMA = JSON_SCHEMA;
exports.NOT_RESOLVED = NOT_RESOLVED;
exports.SCALAR_STYLE = SCALAR_STYLE;
exports.SCALAR_STYLE_DOUBLE_QUOTED = SCALAR_STYLE_DOUBLE_QUOTED;
exports.SCALAR_STYLE_FOLDED_BLOCK = SCALAR_STYLE_FOLDED_BLOCK;
exports.SCALAR_STYLE_LITERAL_BLOCK = SCALAR_STYLE_LITERAL_BLOCK;
exports.SCALAR_STYLE_PLAIN = SCALAR_STYLE_PLAIN;
exports.SCALAR_STYLE_SINGLE_QUOTED = SCALAR_STYLE_SINGLE_QUOTED;
exports.Schema = Schema;
exports.VISIT_BREAK = VISIT_BREAK;
exports.VISIT_SKIP = VISIT_SKIP;
exports.YAML11_SCHEMA = YAML11_SCHEMA;
exports.YAMLException = YAMLException;
exports.binaryTag = binaryTag;
exports.boolCoreTag = boolCoreTag;
exports.boolJsonTag = boolJsonTag;
exports.boolYaml11Tag = boolYaml11Tag;
exports.constructFromEvents = constructFromEvents;
exports.defineMappingTag = defineMappingTag;
exports.defineScalarTag = defineScalarTag;
exports.defineSequenceTag = defineSequenceTag;
exports.dump = dump;
exports.eventsToAst = eventsToAst;
exports.floatCoreTag = floatCoreTag;
exports.floatJsonTag = floatJsonTag;
exports.floatYaml11Tag = floatYaml11Tag;
exports.getScalarValue = getScalarValue;
exports.intCoreTag = intCoreTag;
exports.intJsonTag = intJsonTag;
exports.intYaml11Tag = intYaml11Tag;
exports.jsToAst = jsToAst;
exports.legacyMapTag = legacyMapTag;
exports.load = load;
exports.loadAll = loadAll;
exports.mapTag = mapTag;
exports.mergeTag = mergeTag;
exports.nullCoreTag = nullCoreTag;
exports.nullJsonTag = nullJsonTag;
exports.nullYaml11Tag = nullYaml11Tag;
exports.omapTag = omapTag;
exports.pairsTag = pairsTag;
exports.parseEvents = parseEvents;
exports.present = present;
exports.realMapTag = realMapTag;
exports.seqTag = seqTag;
exports.setTag = setTag;
exports.strTag = strTag;
exports.timestampTag = timestampTag;
exports.visit = visit;

//# sourceMappingURL=js-yaml.cjs.js.map