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-rw-r--r--clang-tools-extra/clangd/AST.cpp66
-rw-r--r--clang-tools-extra/clangd/AST.h6
-rw-r--r--clang-tools-extra/unittests/clangd/CMakeLists.txt1
-rw-r--r--clang-tools-extra/unittests/clangd/FindSymbolsTests.cpp6
-rw-r--r--clang-tools-extra/unittests/clangd/PrintASTTests.cpp100
-rw-r--r--clang/lib/AST/TypePrinter.cpp16
6 files changed, 176 insertions, 19 deletions
diff --git a/clang-tools-extra/clangd/AST.cpp b/clang-tools-extra/clangd/AST.cpp
index 47559c10d36..113069a09eb 100644
--- a/clang-tools-extra/clangd/AST.cpp
+++ b/clang-tools-extra/clangd/AST.cpp
@@ -11,15 +11,37 @@
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclTemplate.h"
+#include "clang/AST/TemplateBase.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Index/USRGeneration.h"
+#include "llvm/ADT/Optional.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ScopedPrinter.h"
+#include "llvm/Support/raw_ostream.h"
namespace clang {
namespace clangd {
+namespace {
+llvm::Optional<llvm::ArrayRef<TemplateArgumentLoc>>
+getTemplateSpecializationArgLocs(const NamedDecl &ND) {
+ if (auto *Func = llvm::dyn_cast<FunctionDecl>(&ND)) {
+ if (const ASTTemplateArgumentListInfo *Args =
+ Func->getTemplateSpecializationArgsAsWritten())
+ return Args->arguments();
+ } else if (auto *Cls =
+ llvm::dyn_cast<ClassTemplatePartialSpecializationDecl>(&ND)) {
+ if (auto *Args = Cls->getTemplateArgsAsWritten())
+ return Args->arguments();
+ } else if (auto *Var = llvm::dyn_cast<VarTemplateSpecializationDecl>(&ND))
+ return Var->getTemplateArgsInfo().arguments();
+ // We return None for ClassTemplateSpecializationDecls because it does not
+ // contain TemplateArgumentLoc information.
+ return llvm::None;
+}
+} // namespace
+
// Returns true if the complete name of decl \p D is spelled in the source code.
// This is not the case for:
// * symbols formed via macro concatenation, the spelling location will
@@ -65,17 +87,6 @@ std::string printQualifiedName(const NamedDecl &ND) {
return QName;
}
-static const TemplateArgumentList *
-getTemplateSpecializationArgs(const NamedDecl &ND) {
- if (auto *Func = llvm::dyn_cast<FunctionDecl>(&ND))
- return Func->getTemplateSpecializationArgs();
- if (auto *Cls = llvm::dyn_cast<ClassTemplateSpecializationDecl>(&ND))
- return &Cls->getTemplateInstantiationArgs();
- if (auto *Var = llvm::dyn_cast<VarTemplateSpecializationDecl>(&ND))
- return &Var->getTemplateInstantiationArgs();
- return nullptr;
-}
-
std::string printName(const ASTContext &Ctx, const NamedDecl &ND) {
std::string Name;
llvm::raw_string_ostream Out(Name);
@@ -90,9 +101,7 @@ std::string printName(const ASTContext &Ctx, const NamedDecl &ND) {
}
ND.getDeclName().print(Out, PP);
if (!Out.str().empty()) {
- // FIXME(ibiryukov): do not show args not explicitly written by the user.
- if (auto *ArgList = getTemplateSpecializationArgs(ND))
- printTemplateArgumentList(Out, ArgList->asArray(), PP);
+ Out << printTemplateSpecializationArgs(ND);
return Out.str();
}
// The name was empty, so present an anonymous entity.
@@ -105,6 +114,35 @@ std::string printName(const ASTContext &Ctx, const NamedDecl &ND) {
return "(anonymous)";
}
+std::string printTemplateSpecializationArgs(const NamedDecl &ND) {
+ std::string TemplateArgs;
+ llvm::raw_string_ostream OS(TemplateArgs);
+ PrintingPolicy Policy(ND.getASTContext().getLangOpts());
+ if (llvm::Optional<llvm::ArrayRef<TemplateArgumentLoc>> Args =
+ getTemplateSpecializationArgLocs(ND)) {
+ printTemplateArgumentList(OS, *Args, Policy);
+ } else if (auto *Cls = llvm::dyn_cast<ClassTemplateSpecializationDecl>(&ND)) {
+ if (const TypeSourceInfo *TSI = Cls->getTypeAsWritten()) {
+ // ClassTemplateSpecializationDecls do not contain
+ // TemplateArgumentTypeLocs, they only have TemplateArgumentTypes. So we
+ // create a new argument location list from TypeSourceInfo.
+ auto STL = TSI->getTypeLoc().getAs<TemplateSpecializationTypeLoc>();
+ llvm::SmallVector<TemplateArgumentLoc, 8> ArgLocs;
+ ArgLocs.reserve(STL.getNumArgs());
+ for (unsigned I = 0; I < STL.getNumArgs(); ++I)
+ ArgLocs.push_back(STL.getArgLoc(I));
+ printTemplateArgumentList(OS, ArgLocs, Policy);
+ } else {
+ // FIXME: Fix cases when getTypeAsWritten returns null inside clang AST,
+ // e.g. friend decls. Currently we fallback to Template Arguments without
+ // location information.
+ printTemplateArgumentList(OS, Cls->getTemplateArgs().asArray(), Policy);
+ }
+ }
+ OS.flush();
+ return TemplateArgs;
+}
+
std::string printNamespaceScope(const DeclContext &DC) {
for (const auto *Ctx = &DC; Ctx != nullptr; Ctx = Ctx->getParent())
if (const auto *NS = dyn_cast<NamespaceDecl>(Ctx))
diff --git a/clang-tools-extra/clangd/AST.h b/clang-tools-extra/clangd/AST.h
index 7798f1feb36..e0e84a0ffb1 100644
--- a/clang-tools-extra/clangd/AST.h
+++ b/clang-tools-extra/clangd/AST.h
@@ -47,6 +47,12 @@ std::string printNamespaceScope(const DeclContext &DC);
/// "(anonymous struct)" or "(anonymous namespace)".
std::string printName(const ASTContext &Ctx, const NamedDecl &ND);
+/// Prints template arguments of a decl as written in the source code, including
+/// enclosing '<' and '>', e.g for a partial specialization like: template
+/// <typename U> struct Foo<int, U> will return '<int, U>'. Returns an empty
+/// string if decl is not a template specialization.
+std::string printTemplateSpecializationArgs(const NamedDecl &ND);
+
/// Gets the symbol ID for a declaration, if possible.
llvm::Optional<SymbolID> getSymbolID(const Decl *D);
diff --git a/clang-tools-extra/unittests/clangd/CMakeLists.txt b/clang-tools-extra/unittests/clangd/CMakeLists.txt
index c908541adef..3095f7d2a9f 100644
--- a/clang-tools-extra/unittests/clangd/CMakeLists.txt
+++ b/clang-tools-extra/unittests/clangd/CMakeLists.txt
@@ -13,6 +13,7 @@ include_directories(
add_extra_unittest(ClangdTests
Annotations.cpp
+ PrintASTTests.cpp
BackgroundIndexTests.cpp
CancellationTests.cpp
ClangdTests.cpp
diff --git a/clang-tools-extra/unittests/clangd/FindSymbolsTests.cpp b/clang-tools-extra/unittests/clangd/FindSymbolsTests.cpp
index 05fa42e9f6f..46504b8983e 100644
--- a/clang-tools-extra/unittests/clangd/FindSymbolsTests.cpp
+++ b/clang-tools-extra/unittests/clangd/FindSymbolsTests.cpp
@@ -525,11 +525,9 @@ TEST_F(DocumentSymbolsTest, Template) {
AllOf(WithName("Tmpl<double>"), WithKind(SymbolKind::Struct),
Children()),
AllOf(WithName("funcTmpl"), Children()),
- // FIXME(ibiryukov): template args should be <int> to match the code.
- AllOf(WithName("funcTmpl<int, double, float>"), Children()),
+ AllOf(WithName("funcTmpl<int>"), Children()),
AllOf(WithName("varTmpl"), Children()),
- // FIXME(ibiryukov): template args should be <int> to match the code.
- AllOf(WithName("varTmpl<int, double>"), Children())));
+ AllOf(WithName("varTmpl<int>"), Children())));
}
TEST_F(DocumentSymbolsTest, Namespaces) {
diff --git a/clang-tools-extra/unittests/clangd/PrintASTTests.cpp b/clang-tools-extra/unittests/clangd/PrintASTTests.cpp
new file mode 100644
index 00000000000..1a986d831c5
--- /dev/null
+++ b/clang-tools-extra/unittests/clangd/PrintASTTests.cpp
@@ -0,0 +1,100 @@
+//===--- PrintASTTests.cpp ----------------------------------------- C++-*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "AST.h"
+#include "Annotations.h"
+#include "Protocol.h"
+#include "SourceCode.h"
+#include "TestTU.h"
+#include "clang/AST/RecursiveASTVisitor.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest-param-test.h"
+#include "gtest/gtest.h"
+#include "gtest/internal/gtest-param-util-generated.h"
+
+namespace clang {
+namespace clangd {
+namespace {
+
+using testing::ElementsAreArray;
+
+struct Case {
+ const char *AnnotatedCode;
+ std::vector<const char *> Expected;
+};
+class ASTUtils : public testing::Test,
+ public ::testing::WithParamInterface<Case> {};
+
+TEST_P(ASTUtils, PrintTemplateArgs) {
+ auto Pair = GetParam();
+ Annotations Test(Pair.AnnotatedCode);
+ auto AST = TestTU::withCode(Test.code()).build();
+ struct Visitor : RecursiveASTVisitor<Visitor> {
+ Visitor(std::vector<Position> Points) : Points(std::move(Points)) {}
+ bool VisitNamedDecl(const NamedDecl *ND) {
+ auto Pos = sourceLocToPosition(ND->getASTContext().getSourceManager(),
+ ND->getLocation());
+ if (Pos != Points[TemplateArgsAtPoints.size()])
+ return true;
+ TemplateArgsAtPoints.push_back(printTemplateSpecializationArgs(*ND));
+ return true;
+ }
+ std::vector<std::string> TemplateArgsAtPoints;
+ const std::vector<Position> Points;
+ };
+ Visitor V(Test.points());
+ V.TraverseDecl(AST.getASTContext().getTranslationUnitDecl());
+ EXPECT_THAT(V.TemplateArgsAtPoints, ElementsAreArray(Pair.Expected));
+}
+
+INSTANTIATE_TEST_CASE_P(ASTUtilsTests, ASTUtils,
+ testing::ValuesIn(std::vector<Case>({
+ {
+ R"cpp(
+ template <class X> class Bar {};
+ template <> class ^Bar<double> {};)cpp",
+ {"<double>"}},
+ {
+ R"cpp(
+ template <class X> class Bar {};
+ template <class T, class U,
+ template<typename> class Z, int Q>
+ struct Foo {};
+ template struct ^Foo<int, bool, Bar, 8>;
+ template <typename T>
+ struct ^Foo<T *, T, Bar, 3> {};)cpp",
+ {"<int, bool, Bar, 8>", "<T *, T, Bar, 3>"}},
+ {
+ R"cpp(
+ template <int ...> void Foz() {};
+ template <> void ^Foz<3, 5, 8>() {};)cpp",
+ {"<3, 5, 8>"}},
+ {
+ R"cpp(
+ template <class X> class Bar {};
+ template <template <class> class ...>
+ class Aux {};
+ template <> class ^Aux<Bar, Bar> {};
+ template <template <class> T>
+ class ^Aux<T, T> {};)cpp",
+ {"<Bar, Bar>", "<T, T>"}},
+ {
+ R"cpp(
+ template <typename T> T var = 1234;
+ template <> int ^var<int> = 1;)cpp",
+ {"<int>"}},
+ {
+ R"cpp(
+ template <typename T> struct Foo;
+ struct Bar { friend class Foo<int>; };
+ template <> struct ^Foo<int> {};)cpp",
+ {"<int>"}},
+ })));
+} // namespace
+} // namespace clangd
+} // namespace clang
diff --git a/clang/lib/AST/TypePrinter.cpp b/clang/lib/AST/TypePrinter.cpp
index ebcc01aa46d..82a2fa09c76 100644
--- a/clang/lib/AST/TypePrinter.cpp
+++ b/clang/lib/AST/TypePrinter.cpp
@@ -1632,6 +1632,19 @@ static const TemplateArgument &getArgument(const TemplateArgumentLoc &A) {
return A.getArgument();
}
+static void printArgument(const TemplateArgument &A, const PrintingPolicy &PP,
+ llvm::raw_ostream &OS) {
+ A.print(PP, OS);
+}
+
+static void printArgument(const TemplateArgumentLoc &A,
+ const PrintingPolicy &PP, llvm::raw_ostream &OS) {
+ const TemplateArgument::ArgKind &Kind = A.getArgument().getKind();
+ if (Kind == TemplateArgument::ArgKind::Type)
+ return A.getTypeSourceInfo()->getType().print(OS, PP);
+ return A.getArgument().print(PP, OS);
+}
+
template<typename TA>
static void printTo(raw_ostream &OS, ArrayRef<TA> Args,
const PrintingPolicy &Policy, bool SkipBrackets) {
@@ -1653,7 +1666,8 @@ static void printTo(raw_ostream &OS, ArrayRef<TA> Args,
} else {
if (!FirstArg)
OS << Comma;
- Argument.print(Policy, ArgOS);
+ // Tries to print the argument with location info if exists.
+ printArgument(Arg, Policy, ArgOS);
}
StringRef ArgString = ArgOS.str();
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