83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include "plugin.hxx"
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namespace {
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class StringConcat:
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public RecursiveASTVisitor<StringConcat>, public loplugin::Plugin
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{
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public:
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explicit StringConcat(InstantiationData const & data): Plugin(data) {}
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void run() override
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{ TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
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bool VisitCallExpr(CallExpr const * expr);
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};
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bool StringConcat::VisitCallExpr(CallExpr const * expr) {
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if (ignoreLocation(expr)) {
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return true;
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}
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FunctionDecl const * fdecl = expr->getDirectCallee();
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if (fdecl == nullptr) {
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return true;
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}
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OverloadedOperatorKind oo = fdecl->getOverloadedOperator();
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if ((oo != OverloadedOperatorKind::OO_Plus
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&& oo != OverloadedOperatorKind::OO_LessLess)
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|| fdecl->getNumParams() != 2 || expr->getNumArgs() != 2
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|| !isa<StringLiteral>(expr->getArg(1)->IgnoreParenImpCasts()))
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{
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return true;
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}
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CallExpr const * left = dyn_cast<CallExpr>(
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expr->getArg(0)->IgnoreParenImpCasts());
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if (left == nullptr) {
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return true;
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}
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FunctionDecl const * ldecl = left->getDirectCallee();
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if (ldecl == nullptr) {
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return true;
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}
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OverloadedOperatorKind loo = ldecl->getOverloadedOperator();
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if ((loo != OverloadedOperatorKind::OO_Plus
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&& loo != OverloadedOperatorKind::OO_LessLess)
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|| ldecl->getNumParams() != 2 || left->getNumArgs() != 2
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|| !isa<StringLiteral>(left->getArg(1)->IgnoreParenImpCasts()))
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{
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return true;
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}
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StringRef name {
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compiler.getSourceManager().getFilename(
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compiler.getSourceManager().getSpellingLoc(expr->getLocStart())) };
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if (name == SRCDIR "/sal/qa/rtl/strings/test_ostring_concat.cxx"
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|| name == SRCDIR "/sal/qa/rtl/strings/test_oustring_concat.cxx")
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{
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return true;
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}
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CXXOperatorCallExpr const * op = dyn_cast<CXXOperatorCallExpr>(expr);
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report(
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DiagnosticsEngine::Warning,
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"replace '%0' between string literals with juxtaposition",
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op == nullptr ? expr->getExprLoc() : op->getOperatorLoc())
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<< (oo == OverloadedOperatorKind::OO_Plus ? "+" : "<<")
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<< SourceRange(
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left->getArg(1)->getLocStart(), expr->getArg(1)->getLocEnd());
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return true;
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}
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loplugin::Plugin::Registration<StringConcat> X("stringconcat");
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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