+++ /dev/null
-/*
- Copyright (C) 2013 Yusuke Suzuki <utatane.tea@gmail.com>
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-(function () {
- 'use strict';
-
- var code = require('./code');
-
- function isStrictModeReservedWordES6(id) {
- switch (id) {
- case 'implements':
- case 'interface':
- case 'package':
- case 'private':
- case 'protected':
- case 'public':
- case 'static':
- case 'let':
- return true;
- default:
- return false;
- }
- }
-
- function isKeywordES5(id, strict) {
- // yield should not be treated as keyword under non-strict mode.
- if (!strict && id === 'yield') {
- return false;
- }
- return isKeywordES6(id, strict);
- }
-
- function isKeywordES6(id, strict) {
- if (strict && isStrictModeReservedWordES6(id)) {
- return true;
- }
-
- switch (id.length) {
- case 2:
- return (id === 'if') || (id === 'in') || (id === 'do');
- case 3:
- return (id === 'var') || (id === 'for') || (id === 'new') || (id === 'try');
- case 4:
- return (id === 'this') || (id === 'else') || (id === 'case') ||
- (id === 'void') || (id === 'with') || (id === 'enum');
- case 5:
- return (id === 'while') || (id === 'break') || (id === 'catch') ||
- (id === 'throw') || (id === 'const') || (id === 'yield') ||
- (id === 'class') || (id === 'super');
- case 6:
- return (id === 'return') || (id === 'typeof') || (id === 'delete') ||
- (id === 'switch') || (id === 'export') || (id === 'import');
- case 7:
- return (id === 'default') || (id === 'finally') || (id === 'extends');
- case 8:
- return (id === 'function') || (id === 'continue') || (id === 'debugger');
- case 10:
- return (id === 'instanceof');
- default:
- return false;
- }
- }
-
- function isReservedWordES5(id, strict) {
- return id === 'null' || id === 'true' || id === 'false' || isKeywordES5(id, strict);
- }
-
- function isReservedWordES6(id, strict) {
- return id === 'null' || id === 'true' || id === 'false' || isKeywordES6(id, strict);
- }
-
- function isRestrictedWord(id) {
- return id === 'eval' || id === 'arguments';
- }
-
- function isIdentifierNameES5(id) {
- var i, iz, ch;
-
- if (id.length === 0) { return false; }
-
- ch = id.charCodeAt(0);
- if (!code.isIdentifierStartES5(ch)) {
- return false;
- }
-
- for (i = 1, iz = id.length; i < iz; ++i) {
- ch = id.charCodeAt(i);
- if (!code.isIdentifierPartES5(ch)) {
- return false;
- }
- }
- return true;
- }
-
- function decodeUtf16(lead, trail) {
- return (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000;
- }
-
- function isIdentifierNameES6(id) {
- var i, iz, ch, lowCh, check;
-
- if (id.length === 0) { return false; }
-
- check = code.isIdentifierStartES6;
- for (i = 0, iz = id.length; i < iz; ++i) {
- ch = id.charCodeAt(i);
- if (0xD800 <= ch && ch <= 0xDBFF) {
- ++i;
- if (i >= iz) { return false; }
- lowCh = id.charCodeAt(i);
- if (!(0xDC00 <= lowCh && lowCh <= 0xDFFF)) {
- return false;
- }
- ch = decodeUtf16(ch, lowCh);
- }
- if (!check(ch)) {
- return false;
- }
- check = code.isIdentifierPartES6;
- }
- return true;
- }
-
- function isIdentifierES5(id, strict) {
- return isIdentifierNameES5(id) && !isReservedWordES5(id, strict);
- }
-
- function isIdentifierES6(id, strict) {
- return isIdentifierNameES6(id) && !isReservedWordES6(id, strict);
- }
-
- module.exports = {
- isKeywordES5: isKeywordES5,
- isKeywordES6: isKeywordES6,
- isReservedWordES5: isReservedWordES5,
- isReservedWordES6: isReservedWordES6,
- isRestrictedWord: isRestrictedWord,
- isIdentifierNameES5: isIdentifierNameES5,
- isIdentifierNameES6: isIdentifierNameES6,
- isIdentifierES5: isIdentifierES5,
- isIdentifierES6: isIdentifierES6
- };
-}());
-/* vim: set sw=4 ts=4 et tw=80 : */
projects / dotfiles / .git / blobdiff