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44 lines
1.3 KiB
44 lines
1.3 KiB
// Copyright 2011 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_INTL_SUPPORT
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#error Internationalization is expected to be enabled.
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#endif // V8_INTL_SUPPORT
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#include "src/char-predicates.h"
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#include "unicode/uchar.h"
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#include "unicode/urename.h"
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namespace v8 {
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namespace internal {
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// ES#sec-names-and-keywords Names and Keywords
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// UnicodeIDStart, '$', '_' and '\'
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bool IdentifierStart::Is(uc32 c) {
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// cannot use u_isIDStart because it does not work for
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// Other_ID_Start characters.
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return u_hasBinaryProperty(c, UCHAR_ID_START) ||
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(c < 0x60 && (c == '$' || c == '\\' || c == '_'));
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}
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// ES#sec-names-and-keywords Names and Keywords
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// UnicodeIDContinue, '$', '_', '\', ZWJ, and ZWNJ
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bool IdentifierPart::Is(uc32 c) {
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// Can't use u_isIDPart because it does not work for
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// Other_ID_Continue characters.
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return u_hasBinaryProperty(c, UCHAR_ID_CONTINUE) ||
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(c < 0x60 && (c == '$' || c == '\\' || c == '_')) || c == 0x200C ||
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c == 0x200D;
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}
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// ES#sec-white-space White Space
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// gC=Zs, U+0009, U+000B, U+000C, U+FEFF
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bool WhiteSpace::Is(uc32 c) {
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return (u_charType(c) == U_SPACE_SEPARATOR) ||
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(c < 0x0D && (c == 0x09 || c == 0x0B || c == 0x0C)) || c == 0xFEFF;
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}
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} // namespace internal
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} // namespace v8
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