1 //===--- RedundantFunctionPtrDereferenceCheck.cpp - clang-tidy-------------===//
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 #include "RedundantFunctionPtrDereferenceCheck.h"
10 #include "clang/AST/ASTContext.h"
11 #include "clang/ASTMatchers/ASTMatchFinder.h"
12 
13 using namespace clang::ast_matchers;
14 
15 namespace clang {
16 namespace tidy {
17 namespace readability {
18 
registerMatchers(MatchFinder * Finder)19 void RedundantFunctionPtrDereferenceCheck::registerMatchers(MatchFinder *Finder) {
20   Finder->addMatcher(unaryOperator(hasOperatorName("*"),
21                                    has(implicitCastExpr(
22                                        hasCastKind(CK_FunctionToPointerDecay))))
23                          .bind("op"),
24                      this);
25 }
26 
check(const MatchFinder::MatchResult & Result)27 void RedundantFunctionPtrDereferenceCheck::check(const MatchFinder::MatchResult &Result) {
28   const auto *Operator = Result.Nodes.getNodeAs<UnaryOperator>("op");
29   diag(Operator->getOperatorLoc(),
30        "redundant repeated dereference of function pointer")
31       << FixItHint::CreateRemoval(Operator->getOperatorLoc());
32 }
33 
34 } // namespace readability
35 } // namespace tidy
36 } // namespace clang
37