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//===--- SwitchMissingDefaultCaseCheck.cpp - clang-tidy -------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "SwitchMissingDefaultCaseCheck.h"
using namespace clang::ast_matchers;
namespace clang::tidy::bugprone {
namespace {
AST_MATCHER(SwitchStmt, hasDefaultCase) {
const SwitchCase *Case = Node.getSwitchCaseList();
while (Case) {
if (DefaultStmt::classof(Case))
return true;
Case = Case->getNextSwitchCase();
}
return false;
}
} // namespace
void SwitchMissingDefaultCaseCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
switchStmt(hasCondition(expr(unless(isInstantiationDependent()),
hasType(qualType(hasCanonicalType(
unless(hasDeclaration(enumDecl()))))))),
unless(hasDefaultCase()))
.bind("switch"),
this);
}
void SwitchMissingDefaultCaseCheck::check(
const ast_matchers::MatchFinder::MatchResult &Result) {
const auto *Switch = Result.Nodes.getNodeAs<SwitchStmt>("switch");
diag(Switch->getSwitchLoc(), "switching on non-enum value without "
"default case may not cover all cases");
}
} // namespace clang::tidy::bugprone
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