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::tidy::readability {
16 
registerMatchers(MatchFinder * Finder)17 void RedundantFunctionPtrDereferenceCheck::registerMatchers(MatchFinder *Finder) {
18   Finder->addMatcher(
19       traverse(TK_AsIs, unaryOperator(hasOperatorName("*"),
20                                       has(implicitCastExpr(hasCastKind(
21                                           CK_FunctionToPointerDecay))))
22                             .bind("op")),
23       this);
24 }
25 
check(const MatchFinder::MatchResult & Result)26 void RedundantFunctionPtrDereferenceCheck::check(const MatchFinder::MatchResult &Result) {
27   const auto *Operator = Result.Nodes.getNodeAs<UnaryOperator>("op");
28   diag(Operator->getOperatorLoc(),
29        "redundant repeated dereference of function pointer")
30       << FixItHint::CreateRemoval(Operator->getOperatorLoc());
31 }
32 
33 } // namespace clang::tidy::readability
34