forked from OSchip/llvm-project
56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
//===--- StaticallyConstructedObjectsCheck.cpp - clang-tidy----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "StaticallyConstructedObjectsCheck.h"
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using namespace clang::ast_matchers;
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namespace clang {
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namespace tidy {
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namespace fuchsia {
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namespace {
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AST_MATCHER(Expr, isConstantInitializer) {
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return Node.isConstantInitializer(Finder->getASTContext(), false);
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}
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AST_MATCHER(VarDecl, isGlobalStatic) {
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return Node.getStorageDuration() == SD_Static && !Node.isLocalVarDecl();
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}
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} // namespace
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void StaticallyConstructedObjectsCheck::registerMatchers(MatchFinder *Finder) {
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// Constructing global, non-trivial objects with static storage is
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// disallowed, unless the object is statically initialized with a constexpr
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// constructor or has no explicit constructor.
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Finder->addMatcher(
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traverse(ast_type_traits::TK_AsIs,
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varDecl(
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// Match global, statically stored objects...
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isGlobalStatic(),
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// ... that have C++ constructors...
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hasDescendant(cxxConstructExpr(unless(allOf(
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// ... unless it is constexpr ...
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hasDeclaration(cxxConstructorDecl(isConstexpr())),
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// ... and is statically initialized.
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isConstantInitializer())))))
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.bind("decl")),
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this);
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}
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void StaticallyConstructedObjectsCheck::check(
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const MatchFinder::MatchResult &Result) {
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if (const auto *D = Result.Nodes.getNodeAs<VarDecl>("decl"))
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diag(D->getBeginLoc(), "static objects are disallowed; if possible, use a "
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"constexpr constructor instead");
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}
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} // namespace fuchsia
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} // namespace tidy
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} // namespace clang
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