1//===--- OperatorPrecedence.cpp ---------------------------------*- 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#include "clang/Basic/OperatorPrecedence.h"
14
15namespace clang {
16
17prec::Level getBinOpPrecedence(tok::TokenKind Kind, bool GreaterThanIsOperator,
18 bool CPlusPlus11) {
19 switch (Kind) {
20 case tok::greater:
21 // C++ [temp.names]p3:
22 // [...] When parsing a template-argument-list, the first
23 // non-nested > is taken as the ending delimiter rather than a
24 // greater-than operator. [...]
25 if (GreaterThanIsOperator)
26 return prec::Relational;
27 return prec::Unknown;
28
29 case tok::greatergreater:
30 // C++11 [temp.names]p3:
31 //
32 // [...] Similarly, the first non-nested >> is treated as two
33 // consecutive but distinct > tokens, the first of which is
34 // taken as the end of the template-argument-list and completes
35 // the template-id. [...]
36 if (GreaterThanIsOperator || !CPlusPlus11)
37 return prec::Shift;
38 return prec::Unknown;
39
40 default: return prec::Unknown;
41 case tok::comma: return prec::Comma;
42 case tok::equal:
43 case tok::starequal:
44 case tok::slashequal:
45 case tok::percentequal:
46 case tok::plusequal:
47 case tok::minusequal:
48 case tok::lesslessequal:
49 case tok::greatergreaterequal:
50 case tok::ampequal:
51 case tok::caretequal:
52 case tok::pipeequal: return prec::Assignment;
53 case tok::question: return prec::Conditional;
54 case tok::pipepipe: return prec::LogicalOr;
55 case tok::caretcaret:
56 case tok::ampamp: return prec::LogicalAnd;
57 case tok::pipe: return prec::InclusiveOr;
58 case tok::caret: return prec::ExclusiveOr;
59 case tok::amp: return prec::And;
60 case tok::exclaimequal:
61 case tok::equalequal: return prec::Equality;
62 case tok::lessequal:
63 case tok::less:
64 case tok::greaterequal: return prec::Relational;
65 case tok::spaceship: return prec::Spaceship;
66 case tok::lessless: return prec::Shift;
67 case tok::plus:
68 case tok::minus: return prec::Additive;
69 case tok::percent:
70 case tok::slash:
71 case tok::star: return prec::Multiplicative;
72 case tok::periodstar:
73 case tok::arrowstar: return prec::PointerToMember;
74 }
75}
76
77} // namespace clang
78

source code of clang/lib/Basic/OperatorPrecedence.cpp