clang-tools  5.0.0
UnaryStaticAssertCheck.cpp
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1 //===--- UnaryStaticAssertCheck.cpp - clang-tidy---------------------------===//
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 #include "UnaryStaticAssertCheck.h"
11 #include "clang/AST/ASTContext.h"
12 #include "clang/ASTMatchers/ASTMatchFinder.h"
13 
14 using namespace clang::ast_matchers;
15 
16 namespace clang {
17 namespace tidy {
18 namespace modernize {
19 
20 void UnaryStaticAssertCheck::registerMatchers(MatchFinder *Finder) {
21  if (!getLangOpts().CPlusPlus1z)
22  return;
23 
24  Finder->addMatcher(staticAssertDecl().bind("static_assert"), this);
25 }
26 
27 void UnaryStaticAssertCheck::check(const MatchFinder::MatchResult &Result) {
28  const auto *MatchedDecl =
29  Result.Nodes.getNodeAs<StaticAssertDecl>("static_assert");
30  const StringLiteral *AssertMessage = MatchedDecl->getMessage();
31 
32  SourceLocation Loc = MatchedDecl->getLocation();
33 
34  if (!AssertMessage || AssertMessage->getLength() ||
35  AssertMessage->getLocStart().isMacroID() || Loc.isMacroID())
36  return;
37 
38  diag(Loc,
39  "use unary 'static_assert' when the string literal is an empty string")
40  << FixItHint::CreateRemoval(AssertMessage->getSourceRange());
41 }
42 
43 } // namespace modernize
44 } // namespace tidy
45 } // namespace clang
SourceLocation Loc
'#' location in the include directive
std::unique_ptr< ast_matchers::MatchFinder > Finder
Definition: ClangTidy.cpp:275