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//
// Copyright (c) 2011 The ANGLE 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 COMPILER_PREPROCESSOR_TOKEN_H_
#define COMPILER_PREPROCESSOR_TOKEN_H_
#include <ostream>
#include <string>
#include "SourceLocation.h"
namespace pp
{
struct Token
{
enum Type
{
LAST = 0, // EOF.
IDENTIFIER = 258,
CONST_INT,
CONST_FLOAT,
OP_INC,
OP_DEC,
OP_LEFT,
OP_RIGHT,
OP_LE,
OP_GE,
OP_EQ,
OP_NE,
OP_AND,
OP_XOR,
OP_OR,
OP_ADD_ASSIGN,
OP_SUB_ASSIGN,
OP_MUL_ASSIGN,
OP_DIV_ASSIGN,
OP_MOD_ASSIGN,
OP_LEFT_ASSIGN,
OP_RIGHT_ASSIGN,
OP_AND_ASSIGN,
OP_XOR_ASSIGN,
OP_OR_ASSIGN,
// Preprocessing token types.
// These types are used by the preprocessor internally.
// Preprocessor clients must not depend or check for them.
PP_HASH,
PP_NUMBER,
PP_OTHER
};
enum Flags
{
AT_START_OF_LINE = 1 << 0,
HAS_LEADING_SPACE = 1 << 1,
EXPANSION_DISABLED = 1 << 2
};
Token()
: type(0),
flags(0)
{
}
void reset();
bool equals(const Token &other) const;
// Returns true if this is the first token on line.
// It disregards any leading whitespace.
bool atStartOfLine() const
{
return (flags & AT_START_OF_LINE) != 0;
}
void setAtStartOfLine(bool start);
bool hasLeadingSpace() const
{
return (flags & HAS_LEADING_SPACE) != 0;
}
void setHasLeadingSpace(bool space);
bool expansionDisabled() const
{
return (flags & EXPANSION_DISABLED) != 0;
}
void setExpansionDisabled(bool disable);
// Converts text into numeric value for CONST_INT and CONST_FLOAT token.
// Returns false if the parsed value cannot fit into an int or float.
bool iValue(int *value) const;
bool uValue(unsigned int *value) const;
bool fValue(float *value) const;
int type;
unsigned int flags;
SourceLocation location;
std::string text;
};
inline bool operator==(const Token &lhs, const Token &rhs)
{
return lhs.equals(rhs);
}
inline bool operator!=(const Token &lhs, const Token &rhs)
{
return !lhs.equals(rhs);
}
extern std::ostream &operator<<(std::ostream &out, const Token &token);
} // namepsace pp
#endif // COMPILER_PREPROCESSOR_TOKEN_H_
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