clang-tools 20.0.0git
ThrowKeywordMissingCheck.cpp
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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
10#include "clang/AST/ASTContext.h"
11#include "clang/ASTMatchers/ASTMatchFinder.h"
12
13using namespace clang::ast_matchers;
14
15namespace clang::tidy::bugprone {
16
18 auto CtorInitializerList =
19 cxxConstructorDecl(hasAnyConstructorInitializer(anything()));
20
21 Finder->addMatcher(
22 cxxConstructExpr(
23 hasType(cxxRecordDecl(
24 isSameOrDerivedFrom(matchesName("[Ee]xception|EXCEPTION")))),
25 unless(anyOf(
26 hasAncestor(
27 stmt(anyOf(cxxThrowExpr(), callExpr(), returnStmt()))),
28 hasAncestor(decl(anyOf(varDecl(), fieldDecl()))),
29 hasAncestor(expr(cxxNewExpr(hasAnyPlacementArg(anything())))),
30 allOf(hasAncestor(CtorInitializerList),
31 unless(hasAncestor(cxxCatchStmt()))))))
32 .bind("temporary-exception-not-thrown"),
33 this);
34}
35
36void ThrowKeywordMissingCheck::check(const MatchFinder::MatchResult &Result) {
37 const auto *TemporaryExpr =
38 Result.Nodes.getNodeAs<Expr>("temporary-exception-not-thrown");
39
40 diag(TemporaryExpr->getBeginLoc(), "suspicious exception object created but "
41 "not thrown; did you mean 'throw %0'?")
42 << TemporaryExpr->getType().getBaseTypeIdentifier()->getName();
43}
44
45} // namespace clang::tidy::bugprone
DiagnosticBuilder diag(SourceLocation Loc, StringRef Description, DiagnosticIDs::Level Level=DiagnosticIDs::Warning)
Add a diagnostic with the check's name.
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.