tools/gn/token.h

   1 // Copyright (c) 2013 The Chromium 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 TOOLS_GN_TOKEN_H_
   6 #define TOOLS_GN_TOKEN_H_
   7
   8 #include "base/strings/string_piece.h"
   9 #include "tools/gn/location.h"
  10
  11 class Token {
  12  public:
  13   enum Type {
  14     INVALID,
  15     INTEGER,    // 123
  16     STRING,     // "blah"
  17     TRUE_TOKEN,  // Not "TRUE" to avoid collisions with #define in windows.h.
  18     FALSE_TOKEN,
  19
  20     // Various operators.
  21     EQUAL,
  22     PLUS,
  23     MINUS,
  24     PLUS_EQUALS,
  25     MINUS_EQUALS,
  26     EQUAL_EQUAL,
  27     NOT_EQUAL,
  28     LESS_EQUAL,
  29     GREATER_EQUAL,
  30     LESS_THAN,
  31     GREATER_THAN,
  32     BOOLEAN_AND,
  33     BOOLEAN_OR,
  34     BANG,
  35     DOT,
  36
  37     LEFT_PAREN,
  38     RIGHT_PAREN,
  39     LEFT_BRACKET,
  40     RIGHT_BRACKET,
  41     LEFT_BRACE,
  42     RIGHT_BRACE,
  43
  44     IF,
  45     ELSE,
  46     IDENTIFIER, // foo
  47     COMMA,  // ,
  48     COMMENT,    // #...\n
  49
  50     UNCLASSIFIED_OPERATOR,  // TODO(scottmg): This shouldn't be necessary.
  51
  52     NUM_TYPES
  53   };
  54
  55   Token();
  56   Token(const Location& location, Type t, const base::StringPiece& v);
  57
  58   Type type() const { return type_; }
  59   const base::StringPiece& value() const { return value_; }
  60   const Location& location() const { return location_; }
  61   LocationRange range() const {
  62     return LocationRange(location_,
  63                          Location(location_.file(), location_.line_number(),
  64                                   location_.char_offset() +
  65                                       static_cast<int>(value_.size())));
  66   }
  67
  68   // Helper functions for comparing this token to something.
  69   bool IsIdentifierEqualTo(const char* v) const;
  70   bool IsStringEqualTo(const char* v) const;
  71
  72  private:
  73   Type type_;
  74   base::StringPiece value_;
  75   Location location_;
  76 };
  77
  78 #endif  // TOOLS_GN_TOKEN_H_