diff --git a/clang-tools-extra/clangd/Selection.cpp b/clang-tools-extra/clangd/Selection.cpp --- a/clang-tools-extra/clangd/Selection.cpp +++ b/clang-tools-extra/clangd/Selection.cpp @@ -60,21 +60,6 @@ // Return the range covering a node and all its children. SourceRange getSourceRange(const DynTypedNode &N) { - // DeclTypeTypeLoc::getSourceRange() is incomplete, which would lead to - // failing to descend into the child expression. - // decltype(2+2); - // ~~~~~~~~~~~~~ <-- correct range - // ~~~~~~~~ <-- range reported by getSourceRange() - // ~~~~~~~~~~~~ <-- range with this hack(i.e, missing closing paren) - // FIXME: Alter DecltypeTypeLoc to contain parentheses locations and get - // rid of this patch. - if (const auto *TL = N.get()) { - if (auto DT = TL->getAs()) { - SourceRange S = DT.getSourceRange(); - S.setEnd(DT.getUnderlyingExpr()->getEndLoc()); - return S; - } - } // MemberExprs to implicitly access anonymous fields should not claim any // tokens for themselves. Given: // struct A { struct { int b; }; }; diff --git a/clang-tools-extra/clangd/unittests/SelectionTests.cpp b/clang-tools-extra/clangd/unittests/SelectionTests.cpp --- a/clang-tools-extra/clangd/unittests/SelectionTests.cpp +++ b/clang-tools-extra/clangd/unittests/SelectionTests.cpp @@ -390,7 +390,7 @@ decltype([[^a]] + a) b; )cpp", "DeclRefExpr"}, - {"[[decltype]]^(1) b;", "DecltypeTypeLoc"}, // Not the VarDecl. + {"[[decltype^(1)]] b;", "DecltypeTypeLoc"}, // Not the VarDecl. // Objective-C nullability attributes. { diff --git a/clang/include/clang/AST/TypeLoc.h b/clang/include/clang/AST/TypeLoc.h --- a/clang/include/clang/AST/TypeLoc.h +++ b/clang/include/clang/AST/TypeLoc.h @@ -1994,12 +1994,35 @@ void initializeLocal(ASTContext &Context, SourceLocation Loc); }; -// FIXME: location of the 'decltype' and parens. -class DecltypeTypeLoc : public InheritingConcreteTypeLoc { +// decltype(expression) abc; +// ~~~~~~~~ DecltypeLoc +// ~ RParenLoc +// FIXME: add LParenLoc, it is tricky to support due to the limitation of +// annotated-decldtype token. +struct DecltypeTypeLocInfo { + SourceLocation DecltypeLoc; + SourceLocation RParenLoc; +}; +class DecltypeTypeLoc + : public ConcreteTypeLoc { public: Expr *getUnderlyingExpr() const { return getTypePtr()->getUnderlyingExpr(); } + + SourceLocation getDecltypeLoc() const { return getLocalData()->DecltypeLoc; } + void setDecltypeLoc(SourceLocation Loc) { getLocalData()->DecltypeLoc = Loc; } + + SourceLocation getRParenLoc() const { return getLocalData()->RParenLoc; } + void setRParenLoc(SourceLocation Loc) { getLocalData()->RParenLoc = Loc; } + + SourceRange getLocalSourceRange() const { + return SourceRange(getDecltypeLoc(), getRParenLoc()); + } + + void initializeLocal(ASTContext &Context, SourceLocation Loc) { + setDecltypeLoc(Loc); + setRParenLoc(Loc); + } }; struct UnaryTransformTypeLocInfo { diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp --- a/clang/lib/Parse/ParseDeclCXX.cpp +++ b/clang/lib/Parse/ParseDeclCXX.cpp @@ -1007,6 +1007,9 @@ if (Tok.is(tok::annot_decltype)) { Result = getExprAnnotation(Tok); EndLoc = Tok.getAnnotationEndLoc(); + // Unfortunately, we don't know the LParen source location as the annotated + // token doesn't have it. + DS.setTypeofParensRange(SourceRange(SourceLocation(), EndLoc)); ConsumeAnnotationToken(); if (Result.isInvalid()) { DS.SetTypeSpecError(); @@ -1071,6 +1074,7 @@ // Match the ')' T.consumeClose(); + DS.setTypeofParensRange(T.getRange()); if (T.getCloseLocation().isInvalid()) { DS.SetTypeSpecError(); // FIXME: this should return the location of the last token diff --git a/clang/lib/Sema/SemaCXXScopeSpec.cpp b/clang/lib/Sema/SemaCXXScopeSpec.cpp --- a/clang/lib/Sema/SemaCXXScopeSpec.cpp +++ b/clang/lib/Sema/SemaCXXScopeSpec.cpp @@ -881,7 +881,8 @@ TypeLocBuilder TLB; DecltypeTypeLoc DecltypeTL = TLB.push(T); - DecltypeTL.setNameLoc(DS.getTypeSpecTypeLoc()); + DecltypeTL.setDecltypeLoc(DS.getTypeSpecTypeLoc()); + DecltypeTL.setRParenLoc(DS.getTypeofParensRange().getEnd()); SS.Extend(Context, SourceLocation(), TLB.getTypeLocInContext(Context, T), ColonColonLoc); return false; diff --git a/clang/lib/Sema/SemaExprCXX.cpp b/clang/lib/Sema/SemaExprCXX.cpp --- a/clang/lib/Sema/SemaExprCXX.cpp +++ b/clang/lib/Sema/SemaExprCXX.cpp @@ -7767,7 +7767,8 @@ TypeLocBuilder TLB; DecltypeTypeLoc DecltypeTL = TLB.push(T); - DecltypeTL.setNameLoc(DS.getTypeSpecTypeLoc()); + DecltypeTL.setDecltypeLoc(DS.getTypeSpecTypeLoc()); + DecltypeTL.setRParenLoc(DS.getTypeofParensRange().getEnd()); TypeSourceInfo *DestructedTypeInfo = TLB.getTypeSourceInfo(Context, T); PseudoDestructorTypeStorage Destructed(DestructedTypeInfo); diff --git a/clang/lib/Sema/SemaType.cpp b/clang/lib/Sema/SemaType.cpp --- a/clang/lib/Sema/SemaType.cpp +++ b/clang/lib/Sema/SemaType.cpp @@ -5973,6 +5973,11 @@ Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo); TL.setUnderlyingTInfo(TInfo); } + void VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { + assert(DS.getTypeSpecType() == DeclSpec::TST_decltype); + TL.setDecltypeLoc(DS.getTypeSpecTypeLoc()); + TL.setRParenLoc(DS.getTypeofParensRange().getEnd()); + } void VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { // FIXME: This holds only because we only have one unary transform. assert(DS.getTypeSpecType() == DeclSpec::TST_underlyingType); diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h --- a/clang/lib/Sema/TreeTransform.h +++ b/clang/lib/Sema/TreeTransform.h @@ -6228,15 +6228,15 @@ QualType Result = TL.getType(); if (getDerived().AlwaysRebuild() || E.get() != T->getUnderlyingExpr()) { - Result = getDerived().RebuildDecltypeType(E.get(), TL.getNameLoc()); + Result = getDerived().RebuildDecltypeType(E.get(), TL.getDecltypeLoc()); if (Result.isNull()) return QualType(); } else E.get(); DecltypeTypeLoc NewTL = TLB.push(Result); - NewTL.setNameLoc(TL.getNameLoc()); - + NewTL.setDecltypeLoc(TL.getDecltypeLoc()); + NewTL.setRParenLoc(TL.getRParenLoc()); return Result; } diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp --- a/clang/lib/Serialization/ASTReader.cpp +++ b/clang/lib/Serialization/ASTReader.cpp @@ -6628,7 +6628,8 @@ } void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { - TL.setNameLoc(readSourceLocation()); + TL.setDecltypeLoc(readSourceLocation()); + TL.setRParenLoc(readSourceLocation()); } void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp --- a/clang/lib/Serialization/ASTWriter.cpp +++ b/clang/lib/Serialization/ASTWriter.cpp @@ -427,7 +427,8 @@ } void TypeLocWriter::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { - Record.AddSourceLocation(TL.getNameLoc()); + Record.AddSourceLocation(TL.getDecltypeLoc()); + Record.AddSourceLocation(TL.getRParenLoc()); } void TypeLocWriter::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { diff --git a/clang/unittests/AST/SourceLocationTest.cpp b/clang/unittests/AST/SourceLocationTest.cpp --- a/clang/unittests/AST/SourceLocationTest.cpp +++ b/clang/unittests/AST/SourceLocationTest.cpp @@ -215,6 +215,33 @@ EXPECT_TRUE(Verifier.match("long a;", typeLoc())); } +TEST(TypeLoc, DecltypeTypeLocRange) { + llvm::Annotations Code(R"( + $full1[[decltype(1)]] a; + struct A {struct B{};} var; + $full2[[decltype(var)]]::B c; + )"); + auto AST = tooling::buildASTFromCodeWithArgs(Code.code(), /*Args=*/{}); + ASTContext &Ctx = AST->getASTContext(); + const auto &SM = Ctx.getSourceManager(); + + auto MatchedLocs = clang::ast_matchers::match( + typeLoc(loc(decltypeType())).bind("target"), Ctx); + ASSERT_EQ(MatchedLocs.size(), 2u); + auto verify = [&](SourceRange ActualRange, + const llvm::Annotations::Range &Expected) { + auto ActualCharRange = + Lexer::getAsCharRange(ActualRange, SM, Ctx.getLangOpts()); + EXPECT_EQ(SM.getFileOffset(ActualCharRange.getBegin()), Expected.Begin); + EXPECT_EQ(SM.getFileOffset(ActualCharRange.getEnd()), Expected.End); + }; + const auto *Target1 = MatchedLocs[0].getNodeAs("target"); + verify(Target1->getSourceRange(), Code.range("full1")); + + const auto *Target2 = MatchedLocs[1].getNodeAs("target"); + verify(Target2->getSourceRange(), Code.range("full2")); +} + TEST(TypeLoc, LongDoubleRange) { RangeVerifier Verifier; Verifier.expectRange(1, 1, 1, 6); @@ -559,7 +586,7 @@ TEST(FriendDecl, FriendDecltypeRange) { RangeVerifier Verifier; - Verifier.expectRange(4, 1, 4, 8); + Verifier.expectRange(4, 1, 4, 22); EXPECT_TRUE(Verifier.match("struct A;\n" "A foo();\n" "struct A {\n"