forked from OSchip/llvm-project
61 lines
2.0 KiB
C++
61 lines
2.0 KiB
C++
//===--- StaticallyConstructedObjectsCheck.cpp - clang-tidy----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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// Constexpr requires C++11 or later.
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if (!getLangOpts().CPlusPlus11)
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return;
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Finder->addMatcher(
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varDecl(allOf(
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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->getLocStart(), "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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