| // 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_ |