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106 lines
2.2 KiB
JavaScript
106 lines
2.2 KiB
JavaScript
/**
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* Copyright 2017 Shape Security, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License")
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { whitespaceArray, whitespaceBool, idStartLargeRegex, idStartBool, idContinueLargeRegex, idContinueBool } from './unicode.js';
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const strictReservedWords = [
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'null',
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'true',
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'false',
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'implements',
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'interface',
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'package',
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'private',
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'protected',
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'public',
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'static',
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'let',
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'if',
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'in',
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'do',
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'var',
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'for',
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'new',
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'try',
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'this',
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'else',
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'case',
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'void',
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'with',
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'enum',
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'while',
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'break',
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'catch',
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'throw',
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'const',
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'yield',
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'class',
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'super',
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'return',
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'typeof',
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'delete',
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'switch',
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'export',
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'import',
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'default',
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'finally',
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'extends',
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'function',
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'continue',
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'debugger',
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'instanceof',
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];
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export function isStrictModeReservedWord(id) {
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return strictReservedWords.indexOf(id) !== -1;
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}
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export function isWhiteSpace(ch) {
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return ch < 128 ? whitespaceBool[ch] : ch === 0xA0 || ch > 0x167F && whitespaceArray.indexOf(ch) !== -1;
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}
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export function isLineTerminator(ch) {
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return ch === 0x0A || ch === 0x0D || ch === 0x2028 || ch === 0x2029;
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}
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export function isIdentifierStart(ch) {
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return ch < 128 ? idStartBool[ch] : idStartLargeRegex.test(String.fromCodePoint(ch));
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}
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export function isIdentifierPart(ch) {
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return ch < 128 ? idContinueBool[ch] : idContinueLargeRegex.test(String.fromCodePoint(ch));
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}
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export function isDecimalDigit(ch) {
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return ch >= 48 && ch <= 57;
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}
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export function getHexValue(rune) {
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if (rune >= '0' && rune <= '9') {
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return rune.charCodeAt(0) - 48;
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}
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if (rune >= 'a' && rune <= 'f') {
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return rune.charCodeAt(0) - 87;
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}
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if (rune >= 'A' && rune <= 'F') {
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return rune.charCodeAt(0) - 55;
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}
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return -1;
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}
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