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// Copyright (c) 2013 The Chromium 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 TOOLS_GN_TOKEN_H_
#define TOOLS_GN_TOKEN_H_
#include "base/strings/string_piece.h"
#include "tools/gn/location.h"
class Token {
public:
enum Type {
INVALID,
INTEGER, // 123
STRING, // "blah"
TRUE_TOKEN, // Not "TRUE" to avoid collisions with #define in windows.h.
FALSE_TOKEN,
// Various operators.
EQUAL,
PLUS,
MINUS,
PLUS_EQUALS,
MINUS_EQUALS,
EQUAL_EQUAL,
NOT_EQUAL,
LESS_EQUAL,
GREATER_EQUAL,
LESS_THAN,
GREATER_THAN,
BOOLEAN_AND,
BOOLEAN_OR,
BANG,
LEFT_PAREN,
RIGHT_PAREN,
LEFT_BRACKET,
RIGHT_BRACKET,
LEFT_BRACE,
RIGHT_BRACE,
IF,
ELSE,
IDENTIFIER, // foo
COMMA, // ,
COMMENT, // #...\n
UNCLASSIFIED_OPERATOR, // TODO(scottmg): This shouldn't be necessary.
NUM_TYPES
};
Token();
Token(const Location& location, Type t, const base::StringPiece& v);
Type type() const { return type_; }
const base::StringPiece& value() const { return value_; }
const Location& location() const { return location_; }
LocationRange range() const {
return LocationRange(location_,
Location(location_.file(), location_.line_number(),
location_.char_offset() +
static_cast<int>(value_.size())));
}
// Helper functions for comparing this token to something.
bool IsIdentifierEqualTo(const char* v) const;
bool IsStringEqualTo(const char* v) const;
// For STRING tokens, returns the string value (no quotes at end, does
// unescaping).
std::string StringValue() const;
private:
Type type_;
base::StringPiece value_;
Location location_;
};
#endif // TOOLS_GN_TOKEN_H_
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