clang  10.0.0svn
OperatorPrecedence.h
Go to the documentation of this file.
1 //===--- OperatorPrecedence.h - Operator precedence levels ------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// \file
10 /// Defines and computes precedence levels for binary/ternary operators.
11 ///
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_BASIC_OPERATORPRECEDENCE_H
15 #define LLVM_CLANG_BASIC_OPERATORPRECEDENCE_H
16 
17 #include "clang/Basic/TokenKinds.h"
18 
19 namespace clang {
20 
21 /// PrecedenceLevels - These are precedences for the binary/ternary
22 /// operators in the C99 grammar. These have been named to relate
23 /// with the C99 grammar productions. Low precedences numbers bind
24 /// more weakly than high numbers.
25 namespace prec {
26  enum Level {
27  Unknown = 0, // Not binary operator.
28  Comma = 1, // ,
29  Assignment = 2, // =, *=, /=, %=, +=, -=, <<=, >>=, &=, ^=, |=
30  Conditional = 3, // ?
31  LogicalOr = 4, // ||
32  LogicalAnd = 5, // &&
33  InclusiveOr = 6, // |
34  ExclusiveOr = 7, // ^
35  And = 8, // &
36  Equality = 9, // ==, !=
37  Relational = 10, // >=, <=, >, <
38  Spaceship = 11, // <=>
39  Shift = 12, // <<, >>
40  Additive = 13, // -, +
41  Multiplicative = 14, // *, /, %
42  PointerToMember = 15 // .*, ->*
43  };
44 }
45 
46 /// 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:24
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.