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(
21       traverse(TK_AsIs, unaryOperator(hasOperatorName("*"),
22                                       has(implicitCastExpr(hasCastKind(
23                                           CK_FunctionToPointerDecay))))
24                             .bind("op")),
25       this);
26 }
27 
check(const MatchFinder::MatchResult & Result)28 void RedundantFunctionPtrDereferenceCheck::check(const MatchFinder::MatchResult &Result) {
29   const auto *Operator = Result.Nodes.getNodeAs<UnaryOperator>("op");
30   diag(Operator->getOperatorLoc(),
31        "redundant repeated dereference of function pointer")
32       << FixItHint::CreateRemoval(Operator->getOperatorLoc());
33 }
34 
35 } // namespace readability
36 } // namespace tidy
37 } // namespace clang
38