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