clang-tools-extra/clang-tidy/bugprone/ThrowKeywordMissingCheck.cpp

   1 //===--- ThrowKeywordMissingCheck.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 "ThrowKeywordMissingCheck.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::bugprone {
  16
  17 void ThrowKeywordMissingCheck::registerMatchers(MatchFinder *Finder) {
  18   Finder->addMatcher(
  19       cxxConstructExpr(
  20           hasType(cxxRecordDecl(
  21               isSameOrDerivedFrom(matchesName("[Ee]xception|EXCEPTION")))),
  22           unless(anyOf(
  23               hasAncestor(
  24                   stmt(anyOf(cxxThrowExpr(), callExpr(), returnStmt()))),
  25               hasAncestor(decl(anyOf(varDecl(), fieldDecl()))),
  26               hasAncestor(expr(cxxNewExpr(hasAnyPlacementArg(anything())))),
  27               allOf(hasAncestor(cxxConstructorDecl()),
  28                     unless(hasAncestor(cxxCatchStmt()))))))
  29           .bind("temporary-exception-not-thrown"),
  30       this);
  31 }
  32
  33 void ThrowKeywordMissingCheck::check(const MatchFinder::MatchResult &Result) {
  34   const auto *TemporaryExpr =
  35       Result.Nodes.getNodeAs<Expr>("temporary-exception-not-thrown");
  36
  37   diag(TemporaryExpr->getBeginLoc(), "suspicious exception object created but "
  38                                      "not thrown; did you mean 'throw %0'?")
  39       << TemporaryExpr->getType().getBaseTypeIdentifier()->getName();
  40 }
  41
  42 } // namespace clang::tidy::bugprone