diff options
| author | Clement Courbet <courbet@google.com> | 2017-07-11 15:45:22 +0000 |
|---|---|---|
| committer | Clement Courbet <courbet@google.com> | 2017-07-11 15:45:22 +0000 |
| commit | e575997e85ce57a89dd5ba926dac7f40e7fffe76 (patch) | |
| tree | 22906b1f49c8626863aef7f158752227006b78b2 /docs/LibASTMatchersReference.html | |
| parent | 1e30b7a60a9a2bfc5657b59bfe8cab0bec8ef957 (diff) | |
[ASTMatchers][NFC] integerLiteral(): Mention negative integers in
documentation.
Trying to match integerLiteral(-1) will silently fail, because an numeric
literal is always positive.
- Update the documentation to explain how to match negative numeric
literals.
- Add a unit test.
Differential Revision: https://reviews.llvm.org/D35196
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@307663 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/LibASTMatchersReference.html')
| -rw-r--r-- | docs/LibASTMatchersReference.html | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/docs/LibASTMatchersReference.html b/docs/LibASTMatchersReference.html index a0403a5edf..cb5020af49 100644 --- a/docs/LibASTMatchersReference.html +++ b/docs/LibASTMatchersReference.html @@ -1872,6 +1872,14 @@ floatLiteral(equals(3.14)) and floatLiteral(equals(314e-2)) integerLiteral(equals(42)) matches 42 +Note that you cannot directly match a negative numeric literal because the +minus sign is not part of the literal: It is a unary operator whose operand +is the positive numeric literal. Instead, you must use a unaryOperator() +matcher to match the minus sign: + +unaryOperator(hasOperatorName("-"), + hasUnaryOperand(integerLiteral(equals(13)))) + Usable as: Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1CharacterLiteral.html">CharacterLiteral</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXBoolLiteralExpr.html">CXXBoolLiteralExpr</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1FloatingLiteral.html">FloatingLiteral</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1IntegerLiteral.html">IntegerLiteral</a>> </pre></td></tr> @@ -2327,6 +2335,14 @@ floatLiteral(equals(3.14)) and floatLiteral(equals(314e-2)) integerLiteral(equals(42)) matches 42 +Note that you cannot directly match a negative numeric literal because the +minus sign is not part of the literal: It is a unary operator whose operand +is the positive numeric literal. Instead, you must use a unaryOperator() +matcher to match the minus sign: + +unaryOperator(hasOperatorName("-"), + hasUnaryOperand(integerLiteral(equals(13)))) + Usable as: Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1CharacterLiteral.html">CharacterLiteral</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXBoolLiteralExpr.html">CXXBoolLiteralExpr</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1FloatingLiteral.html">FloatingLiteral</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1IntegerLiteral.html">IntegerLiteral</a>> </pre></td></tr> @@ -2583,6 +2599,14 @@ floatLiteral(equals(3.14)) and floatLiteral(equals(314e-2)) integerLiteral(equals(42)) matches 42 +Note that you cannot directly match a negative numeric literal because the +minus sign is not part of the literal: It is a unary operator whose operand +is the positive numeric literal. Instead, you must use a unaryOperator() +matcher to match the minus sign: + +unaryOperator(hasOperatorName("-"), + hasUnaryOperand(integerLiteral(equals(13)))) + Usable as: Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1CharacterLiteral.html">CharacterLiteral</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXBoolLiteralExpr.html">CXXBoolLiteralExpr</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1FloatingLiteral.html">FloatingLiteral</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1IntegerLiteral.html">IntegerLiteral</a>> </pre></td></tr> @@ -2866,6 +2890,14 @@ floatLiteral(equals(3.14)) and floatLiteral(equals(314e-2)) integerLiteral(equals(42)) matches 42 +Note that you cannot directly match a negative numeric literal because the +minus sign is not part of the literal: It is a unary operator whose operand +is the positive numeric literal. Instead, you must use a unaryOperator() +matcher to match the minus sign: + +unaryOperator(hasOperatorName("-"), + hasUnaryOperand(integerLiteral(equals(13)))) + Usable as: Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1CharacterLiteral.html">CharacterLiteral</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXBoolLiteralExpr.html">CXXBoolLiteralExpr</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1FloatingLiteral.html">FloatingLiteral</a>>, Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1IntegerLiteral.html">IntegerLiteral</a>> </pre></td></tr> |