clang-tools-extra/clang-tidy/readability/RedundantFunctionPtrDereferenceCheck.cpp

   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
  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
  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