clang  6.0.0svn
OperatorPrecedence.h
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1 //===--- OperatorPrecedence.h - Operator precedence levels ------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// \brief Defines and computes precedence levels for binary/ternary operators.
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_CLANG_BASIC_OPERATORPRECEDENCE_H
16 #define LLVM_CLANG_BASIC_OPERATORPRECEDENCE_H
17 
18 #include "clang/Basic/TokenKinds.h"
19 
20 namespace clang {
21 
22 /// PrecedenceLevels - These are precedences for the binary/ternary
23 /// operators in the C99 grammar. These have been named to relate
24 /// with the C99 grammar productions. Low precedences numbers bind
25 /// more weakly than high numbers.
26 namespace prec {
27  enum Level {
28  Unknown = 0, // Not binary operator.
29  Comma = 1, // ,
30  Assignment = 2, // =, *=, /=, %=, +=, -=, <<=, >>=, &=, ^=, |=
31  Conditional = 3, // ?
32  LogicalOr = 4, // ||
33  LogicalAnd = 5, // &&
34  InclusiveOr = 6, // |
35  ExclusiveOr = 7, // ^
36  And = 8, // &
37  Equality = 9, // ==, !=
38  Relational = 10, // >=, <=, >, <
39  Shift = 11, // <<, >>
40  Additive = 12, // -, +
41  Multiplicative = 13, // *, /, %
42  PointerToMember = 14 // .*, ->*
43  };
44 }
45 
46 /// \brief Return the precedence of the specified binary operator token.
47 prec::Level getBinOpPrecedence(tok::TokenKind Kind, bool GreaterThanIsOperator,
48  bool CPlusPlus11);
49 
50 } // end namespace clang
51 
52 #endif // LLVM_CLANG_OPERATOR_PRECEDENCE_H
Kind
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
Dataflow Directional Tag Classes.
Defines the clang::TokenKind enum and support functions.
prec::Level getBinOpPrecedence(tok::TokenKind Kind, bool GreaterThanIsOperator, bool CPlusPlus11)
Return the precedence of the specified binary operator token.