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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
//===--- UseUncaughtExceptionsCheck.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 "UseUncaughtExceptionsCheck.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.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 modernize {
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void UseUncaughtExceptionsCheck::registerMatchers(MatchFinder *Finder) {
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if (!getLangOpts().CPlusPlus17)
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return;
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std::string MatchText = "::std::uncaught_exception";
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// Using declaration: warning and fix-it.
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Finder->addMatcher(
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usingDecl(hasAnyUsingShadowDecl(hasTargetDecl(hasName(MatchText))))
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.bind("using_decl"),
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this);
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// DeclRefExpr: warning, no fix-it.
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Finder->addMatcher(
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declRefExpr(to(functionDecl(hasName(MatchText))), unless(callExpr()))
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.bind("decl_ref_expr"),
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this);
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// CallExpr: warning, fix-it.
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Finder->addMatcher(callExpr(hasDeclaration(functionDecl(hasName(MatchText))),
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unless(hasAncestor(initListExpr())))
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.bind("call_expr"),
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this);
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// CallExpr in initialisation list: warning, fix-it with avoiding narrowing
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// conversions.
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Finder->addMatcher(callExpr(hasAncestor(initListExpr()),
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hasDeclaration(functionDecl(hasName(MatchText))))
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.bind("init_call_expr"),
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this);
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}
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void UseUncaughtExceptionsCheck::check(const MatchFinder::MatchResult &Result) {
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SourceLocation BeginLoc;
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SourceLocation EndLoc;
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const CallExpr *C = Result.Nodes.getNodeAs<CallExpr>("init_call_expr");
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bool WarnOnly = false;
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if (C) {
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BeginLoc = C->getBeginLoc();
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EndLoc = C->getEndLoc();
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} else if (const auto *E = Result.Nodes.getNodeAs<CallExpr>("call_expr")) {
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BeginLoc = E->getBeginLoc();
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EndLoc = E->getEndLoc();
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} else if (const auto *D =
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Result.Nodes.getNodeAs<DeclRefExpr>("decl_ref_expr")) {
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BeginLoc = D->getBeginLoc();
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EndLoc = D->getEndLoc();
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WarnOnly = true;
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} else {
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const auto *U = Result.Nodes.getNodeAs<UsingDecl>("using_decl");
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assert(U && "Null pointer, no node provided");
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BeginLoc = U->getNameInfo().getBeginLoc();
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EndLoc = U->getNameInfo().getEndLoc();
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}
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auto Diag = diag(BeginLoc, "'std::uncaught_exception' is deprecated, use "
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"'std::uncaught_exceptions' instead");
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if (!BeginLoc.isMacroID()) {
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StringRef Text =
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Lexer::getSourceText(CharSourceRange::getTokenRange(BeginLoc, EndLoc),
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*Result.SourceManager, getLangOpts());
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Text.consume_back("()");
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int TextLength = Text.size();
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if (WarnOnly) {
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return;
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}
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if (!C) {
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Diag << FixItHint::CreateInsertion(BeginLoc.getLocWithOffset(TextLength),
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"s");
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} else {
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Diag << FixItHint::CreateReplacement(C->getSourceRange(),
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"std::uncaught_exceptions() > 0");
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}
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}
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}
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} // namespace modernize
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} // namespace tidy
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} // namespace clang
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