build

docs/dist/shift-parser/utils.js

@@ -0,0 +1,105 @@
+/**
+ * Copyright 2017 Shape Security, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License")
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { whitespaceArray, whitespaceBool, idStartLargeRegex, idStartBool, idContinueLargeRegex, idContinueBool } from './unicode.js';
+
+
+const strictReservedWords = [
+  'null',
+  'true',
+  'false',
+
+  'implements',
+  'interface',
+  'package',
+  'private',
+  'protected',
+  'public',
+  'static',
+  'let',
+
+  'if',
+  'in',
+  'do',
+  'var',
+  'for',
+  'new',
+  'try',
+  'this',
+  'else',
+  'case',
+  'void',
+  'with',
+  'enum',
+  'while',
+  'break',
+  'catch',
+  'throw',
+  'const',
+  'yield',
+  'class',
+  'super',
+  'return',
+  'typeof',
+  'delete',
+  'switch',
+  'export',
+  'import',
+  'default',
+  'finally',
+  'extends',
+  'function',
+  'continue',
+  'debugger',
+  'instanceof',
+];
+
+export function isStrictModeReservedWord(id) {
+  return strictReservedWords.indexOf(id) !== -1;
+}
+
+export function isWhiteSpace(ch) {
+  return ch < 128 ? whitespaceBool[ch] : ch === 0xA0 || ch > 0x167F && whitespaceArray.indexOf(ch) !== -1;
+}
+
+export function isLineTerminator(ch) {
+  return ch === 0x0A || ch === 0x0D || ch === 0x2028 || ch === 0x2029;
+}
+
+export function isIdentifierStart(ch) {
+  return ch < 128 ? idStartBool[ch] : idStartLargeRegex.test(String.fromCodePoint(ch));
+}
+
+export function isIdentifierPart(ch) {
+  return ch < 128 ? idContinueBool[ch] : idContinueLargeRegex.test(String.fromCodePoint(ch));
+}
+
+export function isDecimalDigit(ch) {
+  return ch >= 48 && ch <= 57;
+}
+
+export function getHexValue(rune) {
+  if (rune >= '0' && rune <= '9') {
+    return rune.charCodeAt(0) - 48;
+  }
+  if (rune >= 'a' && rune <= 'f') {
+    return rune.charCodeAt(0) - 87;
+  }
+  if (rune >= 'A' && rune <= 'F') {
+    return rune.charCodeAt(0) - 55;
+  }
+  return -1;
+}