Line data    Source code

       1             : // Copyright 2011 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_CHAR_PREDICATES_H_
       6             : #define V8_CHAR_PREDICATES_H_
       7             : 
       8             : #include "src/globals.h"
       9             : #include "src/unicode.h"
      10             : 
      11             : namespace v8 {
      12             : namespace internal {
      13             : 
      14             : // Unicode character predicates as defined by ECMA-262, 3rd,
      15             : // used for lexical analysis.
      16             : 
      17             : inline constexpr int AsciiAlphaToLower(uc32 c);
      18             : inline constexpr bool IsCarriageReturn(uc32 c);
      19             : inline constexpr bool IsLineFeed(uc32 c);
      20             : inline constexpr bool IsAsciiIdentifier(uc32 c);
      21             : inline constexpr bool IsAlphaNumeric(uc32 c);
      22             : inline constexpr bool IsDecimalDigit(uc32 c);
      23             : inline constexpr bool IsHexDigit(uc32 c);
      24             : inline constexpr bool IsOctalDigit(uc32 c);
      25             : inline constexpr bool IsBinaryDigit(uc32 c);
      26             : inline constexpr bool IsRegExpWord(uc32 c);
      27             : inline constexpr bool IsRegExpNewline(uc32 c);
      28             : 
      29             : // ES#sec-names-and-keywords
      30             : // This includes '_', '$' and '\', and ID_Start according to
      31             : // http://www.unicode.org/reports/tr31/, which consists of categories
      32             : // 'Lu', 'Ll', 'Lt', 'Lm', 'Lo', 'Nl', but excluding properties
      33             : // 'Pattern_Syntax' or 'Pattern_White_Space'.
      34             : inline bool IsIdentifierStart(uc32 c);
      35             : #ifdef V8_INTL_SUPPORT
      36             : V8_EXPORT_PRIVATE bool IsIdentifierStartSlow(uc32 c);
      37             : #else
      38             : inline bool IsIdentifierStartSlow(uc32 c) {
      39             :   // Non-BMP characters are not supported without I18N.
      40             :   return (c <= 0xFFFF) ? unibrow::ID_Start::Is(c) : false;
      41             : }
      42             : #endif
      43             : 
      44             : // ES#sec-names-and-keywords
      45             : // This includes \u200c and \u200d, and ID_Continue according to
      46             : // http://www.unicode.org/reports/tr31/, which consists of ID_Start,
      47             : // the categories 'Mn', 'Mc', 'Nd', 'Pc', but excluding properties
      48             : // 'Pattern_Syntax' or 'Pattern_White_Space'.
      49             : inline bool IsIdentifierPart(uc32 c);
      50             : #ifdef V8_INTL_SUPPORT
      51             : V8_EXPORT_PRIVATE bool IsIdentifierPartSlow(uc32 c);
      52             : #else
      53             : inline bool IsIdentifierPartSlow(uc32 c) {
      54             :   // Non-BMP charaacters are not supported without I18N.
      55             :   if (c <= 0xFFFF) {
      56             :     return unibrow::ID_Start::Is(c) || unibrow::ID_Continue::Is(c);
      57             :   }
      58             :   return false;
      59             : }
      60             : #endif
      61             : 
      62             : // ES6 draft section 11.2
      63             : // This includes all code points of Unicode category 'Zs'.
      64             : // Further included are \u0009, \u000b, \u000c, and \ufeff.
      65             : inline bool IsWhiteSpace(uc32 c);
      66             : #ifdef V8_INTL_SUPPORT
      67             : V8_EXPORT_PRIVATE bool IsWhiteSpaceSlow(uc32 c);
      68             : #else
      69             : inline bool IsWhiteSpaceSlow(uc32 c) { return unibrow::WhiteSpace::Is(c); }
      70             : #endif
      71             : 
      72             : // WhiteSpace and LineTerminator according to ES6 draft section 11.2 and 11.3
      73             : // This includes all the characters with Unicode category 'Z' (= Zs+Zl+Zp)
      74             : // as well as \u0009 - \u000d and \ufeff.
      75             : inline bool IsWhiteSpaceOrLineTerminator(uc32 c);
      76     3434851 : inline bool IsWhiteSpaceOrLineTerminatorSlow(uc32 c) {
      77     6857403 :   return IsWhiteSpaceSlow(c) || unibrow::IsLineTerminator(c);
      78             : }
      79             : 
      80             : inline bool IsLineTerminatorSequence(uc32 c, uc32 next);
      81             : 
      82             : }  // namespace internal
      83             : }  // namespace v8
      84             : 
      85             : #endif  // V8_CHAR_PREDICATES_H_