// Copyright 2011 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef V8_STRINGS_CHAR_PREDICATES_H_ #define V8_STRINGS_CHAR_PREDICATES_H_ #include "src/common/globals.h" #include "src/strings/unicode.h" namespace v8 { namespace internal { // Unicode character predicates as defined by ECMA-262, 3rd, // used for lexical analysis. inline constexpr int AsciiAlphaToLower(uc32 c); inline constexpr bool IsCarriageReturn(uc32 c); inline constexpr bool IsLineFeed(uc32 c); inline constexpr bool IsAsciiIdentifier(uc32 c); inline constexpr bool IsAlphaNumeric(uc32 c); inline constexpr bool IsDecimalDigit(uc32 c); inline constexpr bool IsHexDigit(uc32 c); inline constexpr bool IsOctalDigit(uc32 c); inline constexpr bool IsBinaryDigit(uc32 c); inline constexpr bool IsRegExpWord(uc32 c); inline constexpr bool IsRegExpNewline(uc32 c); // ES#sec-names-and-keywords // This includes '_', '$' and '\', and ID_Start according to // http://www.unicode.org/reports/tr31/, which consists of categories // 'Lu', 'Ll', 'Lt', 'Lm', 'Lo', 'Nl', but excluding properties // 'Pattern_Syntax' or 'Pattern_White_Space'. inline bool IsIdentifierStart(uc32 c); #ifdef V8_INTL_SUPPORT V8_EXPORT_PRIVATE bool IsIdentifierStartSlow(uc32 c); #else inline bool IsIdentifierStartSlow(uc32 c) { // Non-BMP characters are not supported without I18N. return (c <= 0xFFFF) ? unibrow::ID_Start::Is(c) : false; } #endif // ES#sec-names-and-keywords // This includes \u200c and \u200d, and ID_Continue according to // http://www.unicode.org/reports/tr31/, which consists of ID_Start, // the categories 'Mn', 'Mc', 'Nd', 'Pc', but excluding properties // 'Pattern_Syntax' or 'Pattern_White_Space'. inline bool IsIdentifierPart(uc32 c); #ifdef V8_INTL_SUPPORT V8_EXPORT_PRIVATE bool IsIdentifierPartSlow(uc32 c); #else inline bool IsIdentifierPartSlow(uc32 c) { // Non-BMP charaacters are not supported without I18N. if (c <= 0xFFFF) { return unibrow::ID_Start::Is(c) || unibrow::ID_Continue::Is(c); } return false; } #endif // ES6 draft section 11.2 // This includes all code points of Unicode category 'Zs'. // Further included are \u0009, \u000b, \u000c, and \ufeff. inline bool IsWhiteSpace(uc32 c); #ifdef V8_INTL_SUPPORT V8_EXPORT_PRIVATE bool IsWhiteSpaceSlow(uc32 c); #else inline bool IsWhiteSpaceSlow(uc32 c) { return unibrow::WhiteSpace::Is(c); } #endif // WhiteSpace and LineTerminator according to ES6 draft section 11.2 and 11.3 // This includes all the characters with Unicode category 'Z' (= Zs+Zl+Zp) // as well as \u0009 - \u000d and \ufeff. inline bool IsWhiteSpaceOrLineTerminator(uc32 c); inline bool IsWhiteSpaceOrLineTerminatorSlow(uc32 c) { return IsWhiteSpaceSlow(c) || unibrow::IsLineTerminator(c); } inline bool IsLineTerminatorSequence(uc32 c, uc32 next); } // namespace internal } // namespace v8 #endif // V8_STRINGS_CHAR_PREDICATES_H_