| // 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_CHAR_PREDICATES_H_ |
| #define V8_CHAR_PREDICATES_H_ |
| |
| #include "src/unicode.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Unicode character predicates as defined by ECMA-262, 3rd, |
| // used for lexical analysis. |
| |
| inline int AsciiAlphaToLower(uc32 c); |
| inline bool IsCarriageReturn(uc32 c); |
| inline bool IsLineFeed(uc32 c); |
| inline bool IsAsciiIdentifier(uc32 c); |
| inline bool IsAlphaNumeric(uc32 c); |
| inline bool IsDecimalDigit(uc32 c); |
| inline bool IsHexDigit(uc32 c); |
| inline bool IsOctalDigit(uc32 c); |
| inline bool IsBinaryDigit(uc32 c); |
| inline bool IsRegExpWord(uc32 c); |
| inline bool IsRegExpNewline(uc32 c); |
| |
| |
| struct SupplementaryPlanes { |
| static bool IsIDStart(uc32 c); |
| static bool IsIDPart(uc32 c); |
| }; |
| |
| |
| // ES6 draft section 11.6 |
| // 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'. |
| // For code points in the SMPs, we can resort to ICU (if available). |
| struct IdentifierStart { |
| static inline bool Is(uc32 c) { |
| if (c > 0xFFFF) return SupplementaryPlanes::IsIDStart(c); |
| return unibrow::ID_Start::Is(c); |
| } |
| }; |
| |
| |
| // ES6 draft section 11.6 |
| // 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'. |
| // For code points in the SMPs, we can resort to ICU (if available). |
| struct IdentifierPart { |
| static inline bool Is(uc32 c) { |
| if (c > 0xFFFF) return SupplementaryPlanes::IsIDPart(c); |
| return unibrow::ID_Start::Is(c) || unibrow::ID_Continue::Is(c); |
| } |
| }; |
| |
| |
| // ES6 draft section 11.2 |
| // This includes all code points of Unicode category 'Zs'. |
| // \u180e stops being one as of Unicode 6.3.0, but ES6 adheres to Unicode 5.1, |
| // so it is also included. |
| // Further included are \u0009, \u000b, \u0020, \u00a0, \u000c, and \ufeff. |
| // There are no category 'Zs' code points in the SMPs. |
| struct WhiteSpace { |
| static inline bool Is(uc32 c) { return unibrow::WhiteSpace::Is(c); } |
| }; |
| |
| |
| // WhiteSpace and LineTerminator according to ES6 draft section 11.2 and 11.3 |
| // This consists of \000a, \000d, \u2028, and \u2029. |
| struct WhiteSpaceOrLineTerminator { |
| static inline bool Is(uc32 c) { |
| return WhiteSpace::Is(c) || unibrow::LineTerminator::Is(c); |
| } |
| }; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_CHAR_PREDICATES_H_ |