added hover prefixer

1 files changed, 790 insertions, 0 deletions

diff --git a/node_modules/webpack/lib/css/walkCssTokens.js b/node_modules/webpack/lib/css/walkCssTokens.js
new file mode 100644
index 00000000..badc61aa
--- /dev/null
+++ b/node_modules/webpack/lib/css/walkCssTokens.js
@@ -0,0 +1,790 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+/**
+ * @typedef {Object} CssTokenCallbacks
+ * @property {function(string, number): boolean=} isSelector
+ * @property {function(string, number, number, number, number): number=} url
+ * @property {function(string, number, number): number=} string
+ * @property {function(string, number, number): number=} leftParenthesis
+ * @property {function(string, number, number): number=} rightParenthesis
+ * @property {function(string, number, number): number=} pseudoFunction
+ * @property {function(string, number, number): number=} function
+ * @property {function(string, number, number): number=} pseudoClass
+ * @property {function(string, number, number): number=} atKeyword
+ * @property {function(string, number, number): number=} class
+ * @property {function(string, number, number): number=} identifier
+ * @property {function(string, number, number): number=} id
+ * @property {function(string, number, number): number=} leftCurlyBracket
+ * @property {function(string, number, number): number=} rightCurlyBracket
+ * @property {function(string, number, number): number=} semicolon
+ * @property {function(string, number, number): number=} comma
+ */
+
+/** @typedef {function(string, number, CssTokenCallbacks): number} CharHandler */
+
+// spec: https://drafts.csswg.org/css-syntax/
+
+const CC_LINE_FEED = "\n".charCodeAt(0);
+const CC_CARRIAGE_RETURN = "\r".charCodeAt(0);
+const CC_FORM_FEED = "\f".charCodeAt(0);
+
+const CC_TAB = "\t".charCodeAt(0);
+const CC_SPACE = " ".charCodeAt(0);
+
+const CC_SOLIDUS = "/".charCodeAt(0);
+const CC_REVERSE_SOLIDUS = "\\".charCodeAt(0);
+const CC_ASTERISK = "*".charCodeAt(0);
+
+const CC_LEFT_PARENTHESIS = "(".charCodeAt(0);
+const CC_RIGHT_PARENTHESIS = ")".charCodeAt(0);
+const CC_LEFT_CURLY = "{".charCodeAt(0);
+const CC_RIGHT_CURLY = "}".charCodeAt(0);
+const CC_LEFT_SQUARE = "[".charCodeAt(0);
+const CC_RIGHT_SQUARE = "]".charCodeAt(0);
+
+const CC_QUOTATION_MARK = '"'.charCodeAt(0);
+const CC_APOSTROPHE = "'".charCodeAt(0);
+
+const CC_FULL_STOP = ".".charCodeAt(0);
+const CC_COLON = ":".charCodeAt(0);
+const CC_SEMICOLON = ";".charCodeAt(0);
+const CC_COMMA = ",".charCodeAt(0);
+const CC_PERCENTAGE = "%".charCodeAt(0);
+const CC_AT_SIGN = "@".charCodeAt(0);
+
+const CC_LOW_LINE = "_".charCodeAt(0);
+const CC_LOWER_A = "a".charCodeAt(0);
+const CC_LOWER_U = "u".charCodeAt(0);
+const CC_LOWER_E = "e".charCodeAt(0);
+const CC_LOWER_Z = "z".charCodeAt(0);
+const CC_UPPER_A = "A".charCodeAt(0);
+const CC_UPPER_E = "E".charCodeAt(0);
+const CC_UPPER_U = "U".charCodeAt(0);
+const CC_UPPER_Z = "Z".charCodeAt(0);
+const CC_0 = "0".charCodeAt(0);
+const CC_9 = "9".charCodeAt(0);
+
+const CC_NUMBER_SIGN = "#".charCodeAt(0);
+const CC_PLUS_SIGN = "+".charCodeAt(0);
+const CC_HYPHEN_MINUS = "-".charCodeAt(0);
+
+const CC_LESS_THAN_SIGN = "<".charCodeAt(0);
+const CC_GREATER_THAN_SIGN = ">".charCodeAt(0);
+
+/**
+ * @param {number} cc char code
+ * @returns {boolean} true, if cc is a newline
+ */
+const _isNewLine = cc => {
+	return (
+		cc === CC_LINE_FEED || cc === CC_CARRIAGE_RETURN || cc === CC_FORM_FEED
+	);
+};
+
+/** @type {CharHandler} */
+const consumeSpace = (input, pos, callbacks) => {
+	/** @type {number} */
+	let cc;
+	do {
+		pos++;
+		cc = input.charCodeAt(pos);
+	} while (_isWhiteSpace(cc));
+	return pos;
+};
+
+/**
+ * @param {number} cc char code
+ * @returns {boolean} true, if cc is a newline
+ */
+const _isNewline = cc => {
+	return (
+		cc === CC_LINE_FEED || cc === CC_CARRIAGE_RETURN || cc === CC_FORM_FEED
+	);
+};
+
+/**
+ * @param {number} cc char code
+ * @returns {boolean} true, if cc is a space (U+0009 CHARACTER TABULATION or U+0020 SPACE)
+ */
+const _isSpace = cc => {
+	return cc === CC_TAB || cc === CC_SPACE;
+};
+
+/**
+ * @param {number} cc char code
+ * @returns {boolean} true, if cc is a whitespace
+ */
+const _isWhiteSpace = cc => {
+	return _isNewline(cc) || _isSpace(cc);
+};
+
+/**
+ * ident-start code point
+ *
+ * A letter, a non-ASCII code point, or U+005F LOW LINE (_).
+ *
+ * @param {number} cc char code
+ * @returns {boolean} true, if cc is a start code point of an identifier
+ */
+const isIdentStartCodePoint = cc => {
+	return (
+		(cc >= CC_LOWER_A && cc <= CC_LOWER_Z) ||
+		(cc >= CC_UPPER_A && cc <= CC_UPPER_Z) ||
+		cc === CC_LOW_LINE ||
+		cc >= 0x80
+	);
+};
+
+/** @type {CharHandler} */
+const consumeDelimToken = (input, pos, callbacks) => {
+	return pos + 1;
+};
+
+/** @type {CharHandler} */
+const consumeComments = (input, pos, callbacks) => {
+	// If the next two input code point are U+002F SOLIDUS (/) followed by a U+002A
+	// ASTERISK (*), consume them and all following code points up to and including
+	// the first U+002A ASTERISK (*) followed by a U+002F SOLIDUS (/), or up to an
+	// EOF code point. Return to the start of this step.
+	//
+	// If the preceding paragraph ended by consuming an EOF code point, this is a parse error.
+	// But we are silent on errors.
+	if (
+		input.charCodeAt(pos) === CC_SOLIDUS &&
+		input.charCodeAt(pos + 1) === CC_ASTERISK
+	) {
+		pos += 1;
+		while (pos < input.length) {
+			if (
+				input.charCodeAt(pos) === CC_ASTERISK &&
+				input.charCodeAt(pos + 1) === CC_SOLIDUS
+			) {
+				pos += 2;
+				break;
+			}
+			pos++;
+		}
+	}
+	return pos;
+};
+
+/** @type {function(number): CharHandler} */
+const consumeString = quote_cc => (input, pos, callbacks) => {
+	const start = pos;
+	pos = _consumeString(input, pos, quote_cc);
+	if (callbacks.string !== undefined) {
+		pos = callbacks.string(input, start, pos);
+	}
+	return pos;
+};
+
+/**
+ * @param {string} input input
+ * @param {number} pos position
+ * @param {number} quote_cc quote char code
+ * @returns {number} new position
+ */
+const _consumeString = (input, pos, quote_cc) => {
+	pos++;
+	for (;;) {
+		if (pos === input.length) return pos;
+		const cc = input.charCodeAt(pos);
+		if (cc === quote_cc) return pos + 1;
+		if (_isNewLine(cc)) {
+			// bad string
+			return pos;
+		}
+		if (cc === CC_REVERSE_SOLIDUS) {
+			// we don't need to fully parse the escaped code point
+			// just skip over a potential new line
+			pos++;
+			if (pos === input.length) return pos;
+			pos++;
+		} else {
+			pos++;
+		}
+	}
+};
+
+/**
+ * @param {number} cc char code
+ * @returns {boolean} is identifier start code
+ */
+const _isIdentifierStartCode = cc => {
+	return (
+		cc === CC_LOW_LINE ||
+		(cc >= CC_LOWER_A && cc <= CC_LOWER_Z) ||
+		(cc >= CC_UPPER_A && cc <= CC_UPPER_Z) ||
+		cc > 0x80
+	);
+};
+
+/**
+ * @param {number} first first code point
+ * @param {number} second second code point
+ * @returns {boolean} true if two code points are a valid escape
+ */
+const _isTwoCodePointsAreValidEscape = (first, second) => {
+	if (first !== CC_REVERSE_SOLIDUS) return false;
+	if (_isNewLine(second)) return false;
+	return true;
+};
+
+/**
+ * @param {number} cc char code
+ * @returns {boolean} is digit
+ */
+const _isDigit = cc => {
+	return cc >= CC_0 && cc <= CC_9;
+};
+
+/**
+ * @param {string} input input
+ * @param {number} pos position
+ * @returns {boolean} true, if input at pos starts an identifier
+ */
+const _startsIdentifier = (input, pos) => {
+	const cc = input.charCodeAt(pos);
+	if (cc === CC_HYPHEN_MINUS) {
+		if (pos === input.length) return false;
+		const cc = input.charCodeAt(pos + 1);
+		if (cc === CC_HYPHEN_MINUS) return true;
+		if (cc === CC_REVERSE_SOLIDUS) {
+			const cc = input.charCodeAt(pos + 2);
+			return !_isNewLine(cc);
+		}
+		return _isIdentifierStartCode(cc);
+	}
+	if (cc === CC_REVERSE_SOLIDUS) {
+		const cc = input.charCodeAt(pos + 1);
+		return !_isNewLine(cc);
+	}
+	return _isIdentifierStartCode(cc);
+};
+
+/** @type {CharHandler} */
+const consumeNumberSign = (input, pos, callbacks) => {
+	const start = pos;
+	pos++;
+	if (pos === input.length) return pos;
+	if (callbacks.isSelector(input, pos) && _startsIdentifier(input, pos)) {
+		pos = _consumeIdentifier(input, pos, callbacks);
+		if (callbacks.id !== undefined) {
+			return callbacks.id(input, start, pos);
+		}
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeMinus = (input, pos, callbacks) => {
+	const start = pos;
+	pos++;
+	if (pos === input.length) return pos;
+	const cc = input.charCodeAt(pos);
+	// If the input stream starts with a number, reconsume the current input code point, consume a numeric token, and return it.
+	if (cc === CC_FULL_STOP || _isDigit(cc)) {
+		return consumeNumericToken(input, pos, callbacks);
+	} else if (cc === CC_HYPHEN_MINUS) {
+		pos++;
+		if (pos === input.length) return pos;
+		const cc = input.charCodeAt(pos);
+		if (cc === CC_GREATER_THAN_SIGN) {
+			return pos + 1;
+		} else {
+			pos = _consumeIdentifier(input, pos, callbacks);
+			if (callbacks.identifier !== undefined) {
+				return callbacks.identifier(input, start, pos);
+			}
+		}
+	} else if (cc === CC_REVERSE_SOLIDUS) {
+		if (pos + 1 === input.length) return pos;
+		const cc = input.charCodeAt(pos + 1);
+		if (_isNewLine(cc)) return pos;
+		pos = _consumeIdentifier(input, pos, callbacks);
+		if (callbacks.identifier !== undefined) {
+			return callbacks.identifier(input, start, pos);
+		}
+	} else if (_isIdentifierStartCode(cc)) {
+		pos = consumeOtherIdentifier(input, pos - 1, callbacks);
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeDot = (input, pos, callbacks) => {
+	const start = pos;
+	pos++;
+	if (pos === input.length) return pos;
+	const cc = input.charCodeAt(pos);
+	if (_isDigit(cc)) return consumeNumericToken(input, pos - 2, callbacks);
+	if (!callbacks.isSelector(input, pos) || !_startsIdentifier(input, pos))
+		return pos;
+	pos = _consumeIdentifier(input, pos, callbacks);
+	if (callbacks.class !== undefined) return callbacks.class(input, start, pos);
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeNumericToken = (input, pos, callbacks) => {
+	pos = _consumeNumber(input, pos, callbacks);
+	if (pos === input.length) return pos;
+	if (_startsIdentifier(input, pos))
+		return _consumeIdentifier(input, pos, callbacks);
+	const cc = input.charCodeAt(pos);
+	if (cc === CC_PERCENTAGE) return pos + 1;
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeOtherIdentifier = (input, pos, callbacks) => {
+	const start = pos;
+	pos = _consumeIdentifier(input, pos, callbacks);
+	if (pos !== input.length && input.charCodeAt(pos) === CC_LEFT_PARENTHESIS) {
+		pos++;
+		if (callbacks.function !== undefined) {
+			return callbacks.function(input, start, pos);
+		}
+	} else {
+		if (callbacks.identifier !== undefined) {
+			return callbacks.identifier(input, start, pos);
+		}
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumePotentialUrl = (input, pos, callbacks) => {
+	const start = pos;
+	pos = _consumeIdentifier(input, pos, callbacks);
+	const nextPos = pos + 1;
+	if (
+		pos === start + 3 &&
+		input.slice(start, nextPos).toLowerCase() === "url("
+	) {
+		pos++;
+		let cc = input.charCodeAt(pos);
+		while (_isWhiteSpace(cc)) {
+			pos++;
+			if (pos === input.length) return pos;
+			cc = input.charCodeAt(pos);
+		}
+		if (cc === CC_QUOTATION_MARK || cc === CC_APOSTROPHE) {
+			if (callbacks.function !== undefined) {
+				return callbacks.function(input, start, nextPos);
+			}
+			return nextPos;
+		} else {
+			const contentStart = pos;
+			/** @type {number} */
+			let contentEnd;
+			for (;;) {
+				if (cc === CC_REVERSE_SOLIDUS) {
+					pos++;
+					if (pos === input.length) return pos;
+					pos++;
+				} else if (_isWhiteSpace(cc)) {
+					contentEnd = pos;
+					do {
+						pos++;
+						if (pos === input.length) return pos;
+						cc = input.charCodeAt(pos);
+					} while (_isWhiteSpace(cc));
+					if (cc !== CC_RIGHT_PARENTHESIS) return pos;
+					pos++;
+					if (callbacks.url !== undefined) {
+						return callbacks.url(input, start, pos, contentStart, contentEnd);
+					}
+					return pos;
+				} else if (cc === CC_RIGHT_PARENTHESIS) {
+					contentEnd = pos;
+					pos++;
+					if (callbacks.url !== undefined) {
+						return callbacks.url(input, start, pos, contentStart, contentEnd);
+					}
+					return pos;
+				} else if (cc === CC_LEFT_PARENTHESIS) {
+					return pos;
+				} else {
+					pos++;
+				}
+				if (pos === input.length) return pos;
+				cc = input.charCodeAt(pos);
+			}
+		}
+	} else {
+		if (callbacks.identifier !== undefined) {
+			return callbacks.identifier(input, start, pos);
+		}
+		return pos;
+	}
+};
+
+/** @type {CharHandler} */
+const consumePotentialPseudo = (input, pos, callbacks) => {
+	const start = pos;
+	pos++;
+	if (!callbacks.isSelector(input, pos) || !_startsIdentifier(input, pos))
+		return pos;
+	pos = _consumeIdentifier(input, pos, callbacks);
+	let cc = input.charCodeAt(pos);
+	if (cc === CC_LEFT_PARENTHESIS) {
+		pos++;
+		if (callbacks.pseudoFunction !== undefined) {
+			return callbacks.pseudoFunction(input, start, pos);
+		}
+		return pos;
+	}
+	if (callbacks.pseudoClass !== undefined) {
+		return callbacks.pseudoClass(input, start, pos);
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeLeftParenthesis = (input, pos, callbacks) => {
+	pos++;
+	if (callbacks.leftParenthesis !== undefined) {
+		return callbacks.leftParenthesis(input, pos - 1, pos);
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeRightParenthesis = (input, pos, callbacks) => {
+	pos++;
+	if (callbacks.rightParenthesis !== undefined) {
+		return callbacks.rightParenthesis(input, pos - 1, pos);
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeLeftCurlyBracket = (input, pos, callbacks) => {
+	pos++;
+	if (callbacks.leftCurlyBracket !== undefined) {
+		return callbacks.leftCurlyBracket(input, pos - 1, pos);
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeRightCurlyBracket = (input, pos, callbacks) => {
+	pos++;
+	if (callbacks.rightCurlyBracket !== undefined) {
+		return callbacks.rightCurlyBracket(input, pos - 1, pos);
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeSemicolon = (input, pos, callbacks) => {
+	pos++;
+	if (callbacks.semicolon !== undefined) {
+		return callbacks.semicolon(input, pos - 1, pos);
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeComma = (input, pos, callbacks) => {
+	pos++;
+	if (callbacks.comma !== undefined) {
+		return callbacks.comma(input, pos - 1, pos);
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const _consumeIdentifier = (input, pos) => {
+	for (;;) {
+		const cc = input.charCodeAt(pos);
+		if (cc === CC_REVERSE_SOLIDUS) {
+			pos++;
+			if (pos === input.length) return pos;
+			pos++;
+		} else if (
+			_isIdentifierStartCode(cc) ||
+			_isDigit(cc) ||
+			cc === CC_HYPHEN_MINUS
+		) {
+			pos++;
+		} else {
+			return pos;
+		}
+	}
+};
+
+/** @type {CharHandler} */
+const _consumeNumber = (input, pos) => {
+	pos++;
+	if (pos === input.length) return pos;
+	let cc = input.charCodeAt(pos);
+	while (_isDigit(cc)) {
+		pos++;
+		if (pos === input.length) return pos;
+		cc = input.charCodeAt(pos);
+	}
+	if (cc === CC_FULL_STOP && pos + 1 !== input.length) {
+		const next = input.charCodeAt(pos + 1);
+		if (_isDigit(next)) {
+			pos += 2;
+			cc = input.charCodeAt(pos);
+			while (_isDigit(cc)) {
+				pos++;
+				if (pos === input.length) return pos;
+				cc = input.charCodeAt(pos);
+			}
+		}
+	}
+	if (cc === CC_LOWER_E || cc === CC_UPPER_E) {
+		if (pos + 1 !== input.length) {
+			const next = input.charCodeAt(pos + 2);
+			if (_isDigit(next)) {
+				pos += 2;
+			} else if (
+				(next === CC_HYPHEN_MINUS || next === CC_PLUS_SIGN) &&
+				pos + 2 !== input.length
+			) {
+				const next = input.charCodeAt(pos + 2);
+				if (_isDigit(next)) {
+					pos += 3;
+				} else {
+					return pos;
+				}
+			} else {
+				return pos;
+			}
+		}
+	} else {
+		return pos;
+	}
+	cc = input.charCodeAt(pos);
+	while (_isDigit(cc)) {
+		pos++;
+		if (pos === input.length) return pos;
+		cc = input.charCodeAt(pos);
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeLessThan = (input, pos, callbacks) => {
+	if (input.slice(pos + 1, pos + 4) === "!--") return pos + 4;
+	return pos + 1;
+};
+
+/** @type {CharHandler} */
+const consumeAt = (input, pos, callbacks) => {
+	const start = pos;
+	pos++;
+	if (pos === input.length) return pos;
+	if (_startsIdentifier(input, pos)) {
+		pos = _consumeIdentifier(input, pos, callbacks);
+		if (callbacks.atKeyword !== undefined) {
+			pos = callbacks.atKeyword(input, start, pos);
+		}
+	}
+	return pos;
+};
+
+/** @type {CharHandler} */
+const consumeReverseSolidus = (input, pos, callbacks) => {
+	const start = pos;
+	pos++;
+	if (pos === input.length) return pos;
+	// If the input stream starts with a valid escape, reconsume the current input code point, consume an ident-like token, and return it.
+	if (
+		_isTwoCodePointsAreValidEscape(
+			input.charCodeAt(start),
+			input.charCodeAt(pos)
+		)
+	) {
+		return consumeOtherIdentifier(input, pos - 1, callbacks);
+	}
+	// Otherwise, this is a parse error. Return a <delim-token> with its value set to the current input code point.
+	return pos;
+};
+
+const CHAR_MAP = Array.from({ length: 0x80 }, (_, cc) => {
+	// https://drafts.csswg.org/css-syntax/#consume-token
+	switch (cc) {
+		// whitespace
+		case CC_LINE_FEED:
+		case CC_CARRIAGE_RETURN:
+		case CC_FORM_FEED:
+		case CC_TAB:
+		case CC_SPACE:
+			return consumeSpace;
+		// U+0022 QUOTATION MARK (")
+		case CC_QUOTATION_MARK:
+			return consumeString(cc);
+		// U+0023 NUMBER SIGN (#)
+		case CC_NUMBER_SIGN:
+			return consumeNumberSign;
+		// U+0027 APOSTROPHE (')
+		case CC_APOSTROPHE:
+			return consumeString(cc);
+		// U+0028 LEFT PARENTHESIS (()
+		case CC_LEFT_PARENTHESIS:
+			return consumeLeftParenthesis;
+		// U+0029 RIGHT PARENTHESIS ())
+		case CC_RIGHT_PARENTHESIS:
+			return consumeRightParenthesis;
+		// U+002B PLUS SIGN (+)
+		case CC_PLUS_SIGN:
+			return consumeNumericToken;
+		// U+002C COMMA (,)
+		case CC_COMMA:
+			return consumeComma;
+		// U+002D HYPHEN-MINUS (-)
+		case CC_HYPHEN_MINUS:
+			return consumeMinus;
+		// U+002E FULL STOP (.)
+		case CC_FULL_STOP:
+			return consumeDot;
+		// U+003A COLON (:)
+		case CC_COLON:
+			return consumePotentialPseudo;
+		// U+003B SEMICOLON (;)
+		case CC_SEMICOLON:
+			return consumeSemicolon;
+		// U+003C LESS-THAN SIGN (<)
+		case CC_LESS_THAN_SIGN:
+			return consumeLessThan;
+		// U+0040 COMMERCIAL AT (@)
+		case CC_AT_SIGN:
+			return consumeAt;
+		// U+005B LEFT SQUARE BRACKET ([)
+		case CC_LEFT_SQUARE:
+			return consumeDelimToken;
+		// U+005C REVERSE SOLIDUS (\)
+		case CC_REVERSE_SOLIDUS:
+			return consumeReverseSolidus;
+		// U+005D RIGHT SQUARE BRACKET (])
+		case CC_RIGHT_SQUARE:
+			return consumeDelimToken;
+		// U+007B LEFT CURLY BRACKET ({)
+		case CC_LEFT_CURLY:
+			return consumeLeftCurlyBracket;
+		// U+007D RIGHT CURLY BRACKET (})
+		case CC_RIGHT_CURLY:
+			return consumeRightCurlyBracket;
+		// Optimization
+		case CC_LOWER_U:
+		case CC_UPPER_U:
+			return consumePotentialUrl;
+		default:
+			// digit
+			if (_isDigit(cc)) return consumeNumericToken;
+			// ident-start code point
+			if (isIdentStartCodePoint(cc)) {
+				return consumeOtherIdentifier;
+			}
+			// EOF, but we don't have it
+			// anything else
+			return consumeDelimToken;
+	}
+});
+
+/**
+ * @param {string} input input css
+ * @param {CssTokenCallbacks} callbacks callbacks
+ * @returns {void}
+ */
+module.exports = (input, callbacks) => {
+	// This section describes how to consume a token from a stream of code points. It will return a single token of any type.
+	let pos = 0;
+	while (pos < input.length) {
+		// Consume comments.
+		pos = consumeComments(input, pos, callbacks);
+
+		const cc = input.charCodeAt(pos);
+
+		// Consume the next input code point.
+		if (cc < 0x80) {
+			pos = CHAR_MAP[cc](input, pos, callbacks);
+		} else {
+			pos++;
+		}
+	}
+};
+
+module.exports.isIdentStartCodePoint = isIdentStartCodePoint;
+
+/**
+ * @param {string} input input
+ * @param {number} pos position
+ * @returns {number} position after comments
+ */
+module.exports.eatComments = (input, pos) => {
+	for (;;) {
+		let originalPos = pos;
+		pos = consumeComments(input, pos, {});
+		if (originalPos === pos) {
+			break;
+		}
+	}
+
+	return pos;
+};
+
+/**
+ * @param {string} input input
+ * @param {number} pos position
+ * @returns {number} position after whitespace
+ */
+module.exports.eatWhitespace = (input, pos) => {
+	while (_isWhiteSpace(input.charCodeAt(pos))) {
+		pos++;
+	}
+
+	return pos;
+};
+
+/**
+ * @param {string} input input
+ * @param {number} pos position
+ * @returns {number} position after whitespace and comments
+ */
+module.exports.eatWhitespaceAndComments = (input, pos) => {
+	for (;;) {
+		let originalPos = pos;
+		pos = consumeComments(input, pos, {});
+		while (_isWhiteSpace(input.charCodeAt(pos))) {
+			pos++;
+		}
+		if (originalPos === pos) {
+			break;
+		}
+	}
+
+	return pos;
+};
+
+/**
+ * @param {string} input input
+ * @param {number} pos position
+ * @returns {number} position after whitespace
+ */
+module.exports.eatWhiteLine = (input, pos) => {
+	for (;;) {
+		const cc = input.charCodeAt(pos);
+		if (_isSpace(cc)) {
+			pos++;
+			continue;
+		}
+		if (_isNewLine(cc)) pos++;
+		// For `\r\n`
+		if (cc === CC_CARRIAGE_RETURN && input.charCodeAt(pos + 1) === CC_LINE_FEED)
+			pos++;
+		break;
+	}
+
+	return pos;
+};