blob: c0475a896ed847112367978e6185e4d138ccdc6f [file] [log] [blame]
// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COMPILER_PREPROCESSOR_TOKEN_H_
#define COMPILER_PREPROCESSOR_TOKEN_H_
#include <ostream>
#include <string>
#include "SourceLocation.h"
namespace pp
{
struct Token
{
enum Type
{
// Calling this ERROR causes a conflict with wingdi.h
GOT_ERROR = -1,
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);
}
std::ostream &operator<<(std::ostream &out, const Token &token);
} // namepsace pp
#endif // COMPILER_PREPROCESSOR_TOKEN_H_