snowpack
Version:
The ESM-powered frontend build tool. Fast, lightweight, unbundled.
62 lines (61 loc) • 2.5 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.keywordStart = exports.isPunctuator = exports.isBrOrWsOrPunctuatorNotDot = exports.isEOL = exports.checkIdent = void 0;
function checkIdent(code, pos, text) {
return code.slice(pos, pos + text.length) === text;
}
exports.checkIdent = checkIdent;
function isEOL(code, pos) {
return code.charAt(pos) === '\n' || (code.charAt(pos) === '\r' && code.charAt(pos + 1) === '\n');
}
exports.isEOL = isEOL;
/*
* Adopted from https://github.com/guybedford/es-module-lexer
* Licensed under the
*
* MIT License
* -----------
*
* Copyright (C) 2018-2019 Guy Bedford
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
function isBrOrWsOrPunctuatorNotDot(ch) {
const c = ch.charCodeAt(0);
return (c > 8 && c < 14) || c == 32 || c == 160 || (isPunctuator(ch) && ch != '.');
}
exports.isBrOrWsOrPunctuatorNotDot = isBrOrWsOrPunctuatorNotDot;
function isPunctuator(ch) {
const c = ch.charCodeAt(0);
// 23 possible punctuator endings: !%&()*+,-./:;<=>?[]^{}|~
return (ch == '!' ||
ch == '%' ||
ch == '&' ||
(c > 39 && c < 48) ||
(c > 57 && c < 64) ||
ch == '[' ||
ch == ']' ||
ch == '^' ||
(c > 122 && c < 127));
}
exports.isPunctuator = isPunctuator;
function keywordStart(source, pos) {
return pos === 0 || isBrOrWsOrPunctuatorNotDot(source.charAt(pos - 1));
}
exports.keywordStart = keywordStart;