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Diffstat (limited to 'compilerplugins/clang/unnecessaryparen.cxx')
| -rw-r--r-- | compilerplugins/clang/unnecessaryparen.cxx | 680 |
1 files changed, 680 insertions, 0 deletions
diff --git a/compilerplugins/clang/unnecessaryparen.cxx b/compilerplugins/clang/unnecessaryparen.cxx new file mode 100644 index 000000000..29a790702 --- /dev/null +++ b/compilerplugins/clang/unnecessaryparen.cxx @@ -0,0 +1,680 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#ifndef LO_CLANG_SHARED_PLUGINS + +#include <cassert> +#include <string> +#include <iostream> +#include <fstream> +#include <set> +#include <unordered_set> + +#include <clang/AST/CXXInheritance.h> + +#include "config_clang.h" + +#include "plugin.hxx" + +/** +look for unnecessary parentheses +*/ + +namespace { + +// Like clang::Stmt::IgnoreImplicit (lib/AST/Stmt.cpp), but also ignoring CXXConstructExpr and +// looking through implicit UserDefinedConversion's member function call: +Expr const * ignoreAllImplicit(Expr const * expr) { + while (true) + { + auto oldExpr = expr; + if (auto const e = dyn_cast<ExprWithCleanups>(expr)) { + expr = e->getSubExpr(); + } + else if (auto const e = dyn_cast<CXXConstructExpr>(expr)) { + if (e->getNumArgs() == 1) { + expr = e->getArg(0); + } + } + else if (auto const e = dyn_cast<MaterializeTemporaryExpr>(expr)) { + expr = e->getSubExpr(); + } + else if (auto const e = dyn_cast<CXXBindTemporaryExpr>(expr)) { + expr = e->getSubExpr(); + } + else if (auto const e = dyn_cast<ImplicitCastExpr>(expr)) { + expr = e->getSubExpr(); + if (e->getCastKind() == CK_UserDefinedConversion) { + auto const ce = cast<CXXMemberCallExpr>(expr); + assert(ce->getNumArgs() == 0); + expr = ce->getImplicitObjectArgument(); + } + } + else if (auto const e = dyn_cast<ConstantExpr>(expr)) { + expr = e->getSubExpr(); + } + if (expr == oldExpr) + return expr; + } + return expr; +} + +bool isParenWorthyOpcode(BinaryOperatorKind op) { + return !(BinaryOperator::isMultiplicativeOp(op) || BinaryOperator::isAdditiveOp(op) + || BinaryOperator::isPtrMemOp(op)); +} + +class UnnecessaryParen: + public loplugin::FilteringRewritePlugin<UnnecessaryParen> +{ +public: + explicit UnnecessaryParen(loplugin::InstantiationData const & data): + FilteringRewritePlugin(data) {} + + virtual bool preRun() override + { + StringRef fn(handler.getMainFileName()); + // fixing this, makes the source in the .y files look horrible + if (loplugin::isSamePathname(fn, WORKDIR "/YaccTarget/unoidl/source/sourceprovider-parser.cxx")) + return false; + if (loplugin::isSamePathname(fn, WORKDIR "/YaccTarget/idlc/source/parser.cxx")) + return false; + return true; + } + virtual void run() override + { + if( preRun()) + TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); + } + + bool VisitParenExpr(const ParenExpr *); + bool VisitIfStmt(const IfStmt *); + bool VisitDoStmt(const DoStmt *); + bool VisitWhileStmt(const WhileStmt *); + bool VisitForStmt(ForStmt const * stmt); + bool VisitSwitchStmt(const SwitchStmt *); + bool VisitCaseStmt(const CaseStmt *); + bool VisitReturnStmt(const ReturnStmt* ); + bool VisitCallExpr(const CallExpr *); + bool VisitVarDecl(const VarDecl *); + bool VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *); + bool VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr const *); + bool VisitConditionalOperator(ConditionalOperator const * expr); + bool VisitBinaryConditionalOperator(BinaryConditionalOperator const * expr); + bool VisitMemberExpr(const MemberExpr *f); + bool VisitCXXDeleteExpr(const CXXDeleteExpr *); + + bool VisitImplicitCastExpr(ImplicitCastExpr const * expr) { + if (ignoreLocation(expr)) { + return true; + } + if (expr->getCastKind() != CK_UserDefinedConversion) { + return true; + } + // Filter out a MemberExpr (resp. a ParenExpr sub-expr, if any, as would be found by + // VisitMemberExpr) that is part of a CXXMemberCallExpr which in turn is part of an + // ImplicitCastExpr, so that VisitMemberExpr doesn't erroneously pick it up (and note that + // CXXMemberCallExpr's getImplicitObjectArgument() skips past the underlying MemberExpr): + if (auto const e1 = dyn_cast<CXXMemberCallExpr>(expr->getSubExpr())) { + if (auto const e2 = dyn_cast<ParenExpr>( + e1->getImplicitObjectArgument()->IgnoreImpCasts())) + { + handled_.insert(e2); + } + } + return true; + } + +private: + void VisitSomeStmt(Stmt const * stmt, const Expr* cond, StringRef stmtName); + + void handleUnreachableCodeConditionParens(Expr const * expr); + + // Hack for libxml2's BAD_CAST object-like macro (expanding to "(xmlChar *)"), which is + // typically used as if it were a function-like macro, e.g., as "BAD_CAST(pName)" in + // SwNode::dumpAsXml (sw/source/core/docnode/node.cxx): + bool isPrecededBy_BAD_CAST(Expr const * expr); + + bool badCombination(SourceLocation loc, int prevOffset, int nextOffset); + + bool removeParens(ParenExpr const * expr); + + std::unordered_set<ParenExpr const *> handled_; +}; + +bool UnnecessaryParen::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr const * expr) +{ + if (expr->getKind() == UETT_SizeOf && !expr->isArgumentType()) { + if (auto const e = dyn_cast<ParenExpr>(ignoreAllImplicit(expr->getArgumentExpr()))) { + handled_.insert(e); + } + } + return true; +} + +bool UnnecessaryParen::VisitConditionalOperator(ConditionalOperator const * expr) { + handleUnreachableCodeConditionParens(expr->getCond()); + return true; +} + +bool UnnecessaryParen::VisitBinaryConditionalOperator(BinaryConditionalOperator const * expr) { + handleUnreachableCodeConditionParens(expr->getCond()); + return true; +} + +bool UnnecessaryParen::VisitParenExpr(const ParenExpr* parenExpr) +{ + if (ignoreLocation(parenExpr)) + return true; + if (parenExpr->getBeginLoc().isMacroID()) + return true; + if (handled_.find(parenExpr) != handled_.end()) + return true; + + auto subExpr = ignoreAllImplicit(parenExpr->getSubExpr()); + + if (auto subParenExpr = dyn_cast<ParenExpr>(subExpr)) + { + if (subParenExpr->getBeginLoc().isMacroID()) + return true; + report( + DiagnosticsEngine::Warning, "parentheses around parentheses", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(subParenExpr); + } + + // Somewhat redundantly add parenExpr to handled_, so that issues within InitListExpr don't get + // reported twice (without having to change TraverseInitListExpr to only either traverse the + // syntactic or semantic form, as other plugins do): + + if (isa<DeclRefExpr>(subExpr)) { + if (!isPrecededBy_BAD_CAST(parenExpr)) { + report( + DiagnosticsEngine::Warning, "unnecessary parentheses around identifier", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + } + } else if (isa<IntegerLiteral>(subExpr) || isa<CharacterLiteral>(subExpr) + || isa<FloatingLiteral>(subExpr) || isa<ImaginaryLiteral>(subExpr) + || isa<CXXBoolLiteralExpr>(subExpr) || isa<CXXNullPtrLiteralExpr>(subExpr) + || isa<ObjCBoolLiteralExpr>(subExpr)) + { + auto const loc = subExpr->getBeginLoc(); + if (loc.isMacroID() && compiler.getSourceManager().isAtStartOfImmediateMacroExpansion(loc)) + { + // just in case the macro could also expand to something that /would/ require + // parentheses here + return true; + } + report( + DiagnosticsEngine::Warning, "unnecessary parentheses around literal", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + } else if (auto const e = dyn_cast<clang::StringLiteral>(subExpr)) { + if (e->getNumConcatenated() == 1 && !isPrecededBy_BAD_CAST(parenExpr)) { + report( + DiagnosticsEngine::Warning, + "unnecessary parentheses around single-token string literal", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + } + } else if (auto const e = dyn_cast<UnaryOperator>(subExpr)) { + auto const op = e->getOpcode(); + if (op == UO_Plus || op == UO_Minus) { + auto const e2 = e->getSubExpr(); + if (isa<IntegerLiteral>(e2) || isa<FloatingLiteral>(e2) || isa<ImaginaryLiteral>(e2)) { + report( + DiagnosticsEngine::Warning, + "unnecessary parentheses around signed numeric literal", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + } + } + } else if (isa<CXXNamedCastExpr>(subExpr)) { + if (!removeParens(parenExpr)) { + report( + DiagnosticsEngine::Warning, "unnecessary parentheses around cast", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + } + handled_.insert(parenExpr); + } else if (auto memberExpr = dyn_cast<MemberExpr>(subExpr)) { + if (isa<CXXThisExpr>(ignoreAllImplicit(memberExpr->getBase()))) { + report( + DiagnosticsEngine::Warning, "unnecessary parentheses around member expr", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + } + } + + return true; +} + +bool UnnecessaryParen::VisitIfStmt(const IfStmt* ifStmt) +{ + handleUnreachableCodeConditionParens(ifStmt->getCond()); + VisitSomeStmt(ifStmt, ifStmt->getCond(), "if"); + return true; +} + +bool UnnecessaryParen::VisitDoStmt(const DoStmt* doStmt) +{ + VisitSomeStmt(doStmt, doStmt->getCond(), "do"); + return true; +} + +bool UnnecessaryParen::VisitWhileStmt(const WhileStmt* whileStmt) +{ + handleUnreachableCodeConditionParens(whileStmt->getCond()); + VisitSomeStmt(whileStmt, whileStmt->getCond(), "while"); + return true; +} + +bool UnnecessaryParen::VisitForStmt(ForStmt const * stmt) { + if (auto const cond = stmt->getCond()) { + handleUnreachableCodeConditionParens(cond); + } + return true; +} + +bool UnnecessaryParen::VisitSwitchStmt(const SwitchStmt* switchStmt) +{ + VisitSomeStmt(switchStmt, switchStmt->getCond(), "switch"); + return true; +} + +bool UnnecessaryParen::VisitCaseStmt(const CaseStmt* caseStmt) +{ + VisitSomeStmt(caseStmt, caseStmt->getLHS(), "case"); + return true; +} + +bool UnnecessaryParen::VisitReturnStmt(const ReturnStmt* returnStmt) +{ + if (ignoreLocation(returnStmt)) + return true; + + if (!returnStmt->getRetValue()) + return true; + auto parenExpr = dyn_cast<ParenExpr>(ignoreAllImplicit(returnStmt->getRetValue())); + if (!parenExpr) + return true; + if (parenExpr->getBeginLoc().isMacroID()) + return true; + // assignments need extra parentheses or they generate a compiler warning + auto binaryOp = dyn_cast<BinaryOperator>(parenExpr->getSubExpr()); + if (binaryOp && binaryOp->getOpcode() == BO_Assign) + return true; + + // only non-operator-calls for now + auto subExpr = ignoreAllImplicit(parenExpr->getSubExpr()); + if (isa<CallExpr>(subExpr) && !isa<CXXOperatorCallExpr>(subExpr)) + { + report( + DiagnosticsEngine::Warning, "parentheses immediately inside return statement", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + } + return true; +} + +void UnnecessaryParen::VisitSomeStmt(const Stmt * stmt, const Expr* cond, StringRef stmtName) +{ + if (ignoreLocation(stmt)) + return; + + auto parenExpr = dyn_cast<ParenExpr>(ignoreAllImplicit(cond)); + if (parenExpr) { + if (handled_.find(parenExpr) != handled_.end()) { + return; + } + if (parenExpr->getBeginLoc().isMacroID()) + return; + // assignments need extra parentheses or they generate a compiler warning + auto binaryOp = dyn_cast<BinaryOperator>(parenExpr->getSubExpr()); + if (binaryOp && binaryOp->getOpcode() == BO_Assign) + return; + if (auto const opCall = dyn_cast<CXXOperatorCallExpr>(parenExpr->getSubExpr())) { + if (opCall->getOperator() == OO_Equal) { + return; + } + } + report( + DiagnosticsEngine::Warning, "parentheses immediately inside %0 statement", + parenExpr->getBeginLoc()) + << stmtName + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + } +} + +bool UnnecessaryParen::VisitCallExpr(const CallExpr* callExpr) +{ + if (ignoreLocation(callExpr)) + return true; + if (callExpr->getNumArgs() == 0 || isa<CXXOperatorCallExpr>(callExpr)) + return true; + + // if we are calling a >1 arg method, are we using the defaults? + if (callExpr->getNumArgs() > 1) + { + if (!isa<CXXDefaultArgExpr>(callExpr->getArg(1))) + return true; + } + + auto parenExpr = dyn_cast<ParenExpr>(ignoreAllImplicit(callExpr->getArg(0))); + if (!parenExpr) + return true; + if (parenExpr->getBeginLoc().isMacroID()) + return true; + // assignments need extra parentheses or they generate a compiler warning + auto binaryOp = dyn_cast<BinaryOperator>(parenExpr->getSubExpr()); + if (binaryOp && binaryOp->getOpcode() == BO_Assign) + return true; + report( + DiagnosticsEngine::Warning, "parentheses immediately inside single-arg call", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + return true; +} + +bool UnnecessaryParen::VisitCXXDeleteExpr(const CXXDeleteExpr* deleteExpr) +{ + if (ignoreLocation(deleteExpr)) + return true; + + auto parenExpr = dyn_cast<ParenExpr>(ignoreAllImplicit(deleteExpr->getArgument())); + if (!parenExpr) + return true; + if (parenExpr->getBeginLoc().isMacroID()) + return true; + // assignments need extra parentheses or they generate a compiler warning + auto binaryOp = dyn_cast<BinaryOperator>(parenExpr->getSubExpr()); + if (binaryOp && binaryOp->getOpcode() == BO_Assign) + return true; + report( + DiagnosticsEngine::Warning, "parentheses immediately inside delete expr", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + return true; +} + +bool UnnecessaryParen::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr* callExpr) +{ + if (ignoreLocation(callExpr)) + return true; + if (callExpr->getNumArgs() != 2) + return true; + + // Same logic as CXXOperatorCallExpr::isAssignmentOp(), which our supported clang + // doesn't have yet. + auto Opc = callExpr->getOperator(); + if (Opc != OO_Equal && Opc != OO_StarEqual && + Opc != OO_SlashEqual && Opc != OO_PercentEqual && + Opc != OO_PlusEqual && Opc != OO_MinusEqual && + Opc != OO_LessLessEqual && Opc != OO_GreaterGreaterEqual && + Opc != OO_AmpEqual && Opc != OO_CaretEqual && + Opc != OO_PipeEqual) + return true; + auto parenExpr = dyn_cast<ParenExpr>(ignoreAllImplicit(callExpr->getArg(1))); + if (!parenExpr) + return true; + if (parenExpr->getBeginLoc().isMacroID()) + return true; + // Sometimes parentheses make the RHS of an assignment easier to read by + // visually disambiguating the = from a call to == + auto sub = parenExpr->getSubExpr(); + if (auto const e = dyn_cast<CXXRewrittenBinaryOperator>(sub)) { + if (isParenWorthyOpcode(e->getDecomposedForm().Opcode)) { + return true; + } + } + if (auto subBinOp = dyn_cast<BinaryOperator>(sub)) + { + if (isParenWorthyOpcode(subBinOp->getOpcode())) + return true; + } + if (auto subOperatorCall = dyn_cast<CXXOperatorCallExpr>(sub)) + { + auto op = subOperatorCall->getOperator(); + if (!((op >= OO_Plus && op <= OO_Exclaim) || (op >= OO_ArrowStar && op <= OO_Subscript))) + return true; + } + if (isa<ConditionalOperator>(sub)) + return true; + + report( + DiagnosticsEngine::Warning, "parentheses immediately inside assignment", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + return true; +} + +bool UnnecessaryParen::VisitVarDecl(const VarDecl* varDecl) +{ + if (ignoreLocation(varDecl)) + return true; + if (!varDecl->getInit()) + return true; + + auto parenExpr = dyn_cast<ParenExpr>(ignoreAllImplicit(varDecl->getInit())); + if (!parenExpr) + return true; + if (parenExpr->getBeginLoc().isMacroID()) + return true; + + // Sometimes parentheses make the RHS of an assignment easier to read by + // visually disambiguating the = from a call to == + auto sub = parenExpr->getSubExpr(); + if (auto const e = dyn_cast<CXXRewrittenBinaryOperator>(sub)) { + sub = e->getDecomposedForm().InnerBinOp; + } + if (auto subBinOp = dyn_cast<BinaryOperator>(sub)) + { + if (!(subBinOp->isMultiplicativeOp() || subBinOp->isAdditiveOp() || subBinOp->isPtrMemOp())) + return true; + } + if (auto subOperatorCall = dyn_cast<CXXOperatorCallExpr>(sub)) + { + auto op = subOperatorCall->getOperator(); + if (!((op >= OO_Plus && op <= OO_Exclaim) || (op >= OO_ArrowStar && op <= OO_Subscript))) + return true; + } + if (isa<ConditionalOperator>(sub)) + return true; + + // these two are for "parentheses were disambiguated as a function declaration [-Werror,-Wvexing-parse]" + auto const sub2 = sub->IgnoreImplicit(); + if (isa<CXXTemporaryObjectExpr>(sub2) + || isa<CXXFunctionalCastExpr>(sub2)) + return true; + + report( + DiagnosticsEngine::Warning, "parentheses immediately inside vardecl statement", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + return true; +} + +bool UnnecessaryParen::VisitMemberExpr(const MemberExpr* memberExpr) +{ + if (ignoreLocation(memberExpr)) + return true; + + auto parenExpr = dyn_cast<ParenExpr>(ignoreAllImplicit(memberExpr->getBase())); + if (!parenExpr) + return true; + if (handled_.find(parenExpr) != handled_.end()) + return true; + if (parenExpr->getBeginLoc().isMacroID()) + return true; + + auto sub = parenExpr->getSubExpr(); + if (isa<CallExpr>(sub)) { + if (isa<CXXOperatorCallExpr>(sub)) + return true; + } else if (isa<CXXConstructExpr>(sub)) { + // warn + } else if (isa<MemberExpr>(sub)) { + // warn + } else if (isa<DeclRefExpr>(sub)) { + // warn + } else + return true; + + report( + DiagnosticsEngine::Warning, "unnecessary parentheses around member expr", + parenExpr->getBeginLoc()) + << parenExpr->getSourceRange(); + handled_.insert(parenExpr); + return true; +} + +// Conservatively assume any parenthesised integer or Boolean (incl. Objective-C ones) literal in +// certain condition expressions (i.e., those for which handleUnreachableCodeConditionParens is +// called) to be parenthesised to silence Clang -Wunreachable-code, if that is either the whole +// condition expression or appears as a certain sub-expression (looking at what isConfigurationValue +// in Clang's lib/Analysis/ReachableCode.cpp looks for, descending into certain unary and binary +// operators): +void UnnecessaryParen::handleUnreachableCodeConditionParens(Expr const * expr) { + // Cf. : + auto const e = ignoreAllImplicit(expr); + if (auto const e1 = dyn_cast<ParenExpr>(e)) { + auto const sub = e1->getSubExpr(); + if (isa<IntegerLiteral>(sub) || isa<CXXBoolLiteralExpr>(sub) + || isa<ObjCBoolLiteralExpr>(sub)) + { + handled_.insert(e1); + } + } else if (auto const e1 = dyn_cast<UnaryOperator>(e)) { + if (e1->getOpcode() == UO_LNot) { + handleUnreachableCodeConditionParens(e1->getSubExpr()); + } + } else if (auto const e1 = dyn_cast<BinaryOperator>(e)) { + if (e1->isLogicalOp() || e1->isComparisonOp()) { + handleUnreachableCodeConditionParens(e1->getLHS()); + handleUnreachableCodeConditionParens(e1->getRHS()); + } + } +} + +bool UnnecessaryParen::isPrecededBy_BAD_CAST(Expr const * expr) { + if (expr->getBeginLoc().isMacroID()) { + return false; + } + SourceManager& SM = compiler.getSourceManager(); + const char *p1 = SM.getCharacterData( expr->getBeginLoc().getLocWithOffset(-10) ); + const char *p2 = SM.getCharacterData( expr->getBeginLoc() ); + return std::string(p1, p2 - p1).find("BAD_CAST") != std::string::npos; +} + +namespace { + +bool badCombinationChar(char c) { + return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '_' + || c == '+' || c == '-' || c == '\'' || c == '"'; +} + +} + +bool UnnecessaryParen::badCombination(SourceLocation loc, int prevOffset, int nextOffset) { + //TODO: check for start/end of file; take backslash-newline line concatenation into account + auto const c1 + = compiler.getSourceManager().getCharacterData(loc.getLocWithOffset(prevOffset))[0]; + auto const c2 + = compiler.getSourceManager().getCharacterData(loc.getLocWithOffset(nextOffset))[0]; + // An approximation of avoiding whatever combinations that would cause two adjacent tokens to be + // lexed differently, using, for now, letters (TODO: non-ASCII ones) and digits and '_'; '+' and + // '-' (to avoid ++, etc.); '\'' and '"' (to avoid u'x' or "foo"bar, etc.): + return badCombinationChar(c1) && badCombinationChar(c2); +} + +bool UnnecessaryParen::removeParens(ParenExpr const * expr) { + if (rewriter == nullptr) { + return false; + } + auto const firstBegin = expr->getBeginLoc(); + auto secondBegin = expr->getEndLoc(); + if (firstBegin.isMacroID() || secondBegin.isMacroID()) { + return false; + } + unsigned firstLen = Lexer::MeasureTokenLength( + firstBegin, compiler.getSourceManager(), compiler.getLangOpts()); + for (auto l = firstBegin.getLocWithOffset(std::max<unsigned>(firstLen, 1));; + l = l.getLocWithOffset(1)) + { + unsigned n = Lexer::MeasureTokenLength( + l, compiler.getSourceManager(), compiler.getLangOpts()); + if (n != 0) { + break; + } + ++firstLen; + } + unsigned secondLen = Lexer::MeasureTokenLength( + secondBegin, compiler.getSourceManager(), compiler.getLangOpts()); + for (;;) { + auto l = secondBegin.getLocWithOffset(-1); + auto const c = compiler.getSourceManager().getCharacterData(l)[0]; + if (c == '\n') { + if (compiler.getSourceManager().getCharacterData(l.getLocWithOffset(-1))[0] == '\\') { + break; + } + } else if (!(c == ' ' || c == '\t' || c == '\v' || c == '\f')) { + break; + } + secondBegin = l; + ++secondLen; + } + if (!replaceText(firstBegin, firstLen, badCombination(firstBegin, -1, firstLen) ? " " : "")) { + if (isDebugMode()) { + report( + DiagnosticsEngine::Fatal, + "TODO: cannot rewrite opening parenthesis, needs investigation", + firstBegin); + report( + DiagnosticsEngine::Note, "when removing these parentheses", expr->getExprLoc()) + << expr->getSourceRange(); + } + return false; + } + if (!replaceText(secondBegin, secondLen, badCombination(secondBegin, -1, secondLen) ? " " : "")) + { + //TODO: roll back first change + if (isDebugMode()) { + report( + DiagnosticsEngine::Fatal, + "TODO: cannot rewrite closing parenthesis, needs investigation", + secondBegin); + report( + DiagnosticsEngine::Note, "when removing these parentheses", expr->getExprLoc()) + << expr->getSourceRange(); + } + return false; + } + return true; +} + +loplugin::Plugin::Registration< UnnecessaryParen > unnecessaryparen("unnecessaryparen", true); + +} + +#endif // LO_CLANG_SHARED_PLUGINS + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |