30     function isStrictModeReservedWordES6(id) {  argument
31         switch (id) {
46     function isKeywordES5(id, strict) {  argument
48         if (!strict && id === 'yield') {
51         return isKeywordES6(id, strict);
54     function isKeywordES6(id, strict) {  argument
55         if (strict && isStrictModeReservedWordES6(id)) {
59         switch (id.length) {
61             return (id === 'if') || (id === 'in') || (id === 'do');
63             return (id === 'var') || (id === 'for') || (id === 'new') || (id === 'try');
65             return (id === 'this') || (id === 'else') || (id === 'case') ||
66                 (id === 'void') || (id === 'with') || (id === 'enum');
68             return (id === 'while') || (id === 'break') || (id === 'catch') ||
69                 (id === 'throw') || (id === 'const') || (id === 'yield') ||
70                 (id === 'class') || (id === 'super');
72             return (id === 'return') || (id === 'typeof') || (id === 'delete') ||
73                 (id === 'switch') || (id === 'export') || (id === 'import');
75             return (id === 'default') || (id === 'finally') || (id === 'extends');
77             return (id === 'function') || (id === 'continue') || (id === 'debugger');
79             return (id === 'instanceof');
85     function isReservedWordES5(id, strict) {  argument
86         return id === 'null' || id === 'true' || id === 'false' || isKeywordES5(id, strict);
89     function isReservedWordES6(id, strict) {  argument
90         return id === 'null' || id === 'true' || id === 'false' || isKeywordES6(id, strict);
93     function isRestrictedWord(id) {  argument
94         return id === 'eval' || id === 'arguments';
97     function isIdentifierNameES5(id) {  argument
100         if (id.length === 0) { return false; }
102         ch = id.charCodeAt(0);
107         for (i = 1, iz = id.length; i < iz; ++i) {
108             ch = id.charCodeAt(i);
120     function isIdentifierNameES6(id) {  argument
123         if (id.length === 0) { return false; }
126         for (i = 0, iz = id.length; i < iz; ++i) {
127             ch = id.charCodeAt(i);
131                 lowCh = id.charCodeAt(i);
145     function isIdentifierES5(id, strict) {  argument
146         return isIdentifierNameES5(id) && !isReservedWordES5(id, strict);
149     function isIdentifierES6(id, strict) {  argument
150         return isIdentifierNameES6(id) && !isReservedWordES6(id, strict);