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 /include/clang/ASTMatchers | |
| 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 'include/clang/ASTMatchers')
| -rw-r--r-- | include/clang/ASTMatchers/ASTMatchers.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/clang/ASTMatchers/ASTMatchers.h b/include/clang/ASTMatchers/ASTMatchers.h index cba4c99be9..c9b496df33 100644 --- a/include/clang/ASTMatchers/ASTMatchers.h +++ b/include/clang/ASTMatchers/ASTMatchers.h @@ -3821,6 +3821,14 @@ AST_MATCHER_P(CompoundStmt, statementCountIs, unsigned, N) { /// 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<CharacterLiteral>, Matcher<CXXBoolLiteralExpr>, /// Matcher<FloatingLiteral>, Matcher<IntegerLiteral> template <typename ValueT> |