https://github.com/kadircet created
https://github.com/llvm/llvm-project/pull/82612
Update include-cleaner tests. Now that we have proper found-decls set up
for VarTemplates, in case of instationtations we point to primary
templates and not specializations. To be changed in a follow-up patch.
From 1ae249119856ae2d8c1d2d4a3c3e311fa3d66dd0 Mon Sep 17 00:00:00 2001
From: Kadir Cetinkaya <kadir...@google.com>
Date: Thu, 22 Feb 2024 13:22:11 +0100
Subject: [PATCH] Reland "[clang] Preserve found-decl when constructing
VarTemplateIds"
Update include-cleaner tests. Now that we have proper found-decls set up
for VarTemplates, in case of instationtations we point to primary
templates and not specializations. To be changed in a follow-up patch.
---
.../include-cleaner/unittests/WalkASTTest.cpp | 16 ++++++++--------
clang/include/clang/Sema/Sema.h | 2 +-
clang/lib/Sema/SemaTemplate.cpp | 18 ++++++++----------
clang/test/AST/ast-dump-using.cpp | 7 +++++++
4 files changed, 24 insertions(+), 19 deletions(-)
diff --git a/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
b/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
index bdfc24b8edee38..0be5db36b1fc51 100644
--- a/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
+++ b/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
@@ -200,24 +200,24 @@ TEST(WalkAST, VarTemplates) {
EXPECT_THAT(testWalk(R"cpp(
template <typename T> T $explicit^Foo = 0;)cpp",
"int z = ^Foo<int>;"),
- ElementsAre(Decl::VarTemplateSpecialization));
+ ElementsAre(Decl::VarTemplate));
EXPECT_THAT(testWalk(R"cpp(
- template<typename T> T Foo = 0;
- template<> int $explicit^Foo<int> = 1;)cpp",
+ template<typename T> T $explicit^Foo = 0;
+ template<> int Foo<int> = 1;)cpp",
"int x = ^Foo<int>;"),
- ElementsAre(Decl::VarTemplateSpecialization));
+ ElementsAre(Decl::VarTemplate));
// FIXME: This points at implicit specialization, instead we should point to
// explicit partial specializaiton pattern.
EXPECT_THAT(testWalk(R"cpp(
- template<typename T> T Foo = 0;
- template<typename T> T* $explicit^Foo<T*> = nullptr;)cpp",
+ template<typename T> T $explicit^Foo = 0;
+ template<typename T> T* Foo<T*> = nullptr;)cpp",
"int *x = ^Foo<int *>;"),
- ElementsAre(Decl::VarTemplateSpecialization));
+ ElementsAre(Decl::VarTemplate));
EXPECT_THAT(testWalk(R"cpp(
template<typename T> T $explicit^Foo = 0;
template int Foo<int>;)cpp",
"int x = ^Foo<int>;"),
- ElementsAre(Decl::VarTemplateSpecialization));
+ ElementsAre(Decl::VarTemplate));
}
TEST(WalkAST, FunctionTemplates) {
// Explicit instantiation and (partial) specialization references primary
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index fcccac10f4733a..e457694e4625db 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -8540,7 +8540,7 @@ class Sema final {
/// if the arguments are dependent.
ExprResult CheckVarTemplateId(const CXXScopeSpec &SS,
const DeclarationNameInfo &NameInfo,
- VarTemplateDecl *Template,
+ VarTemplateDecl *Template, NamedDecl *FoundD,
SourceLocation TemplateLoc,
const TemplateArgumentListInfo *TemplateArgs);
diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 1a975a8d0a0df5..7d3d665194add1 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -4958,11 +4958,10 @@ Sema::CheckVarTemplateId(VarTemplateDecl *Template,
SourceLocation TemplateLoc,
return Decl;
}
-ExprResult
-Sema::CheckVarTemplateId(const CXXScopeSpec &SS,
- const DeclarationNameInfo &NameInfo,
- VarTemplateDecl *Template, SourceLocation TemplateLoc,
- const TemplateArgumentListInfo *TemplateArgs) {
+ExprResult Sema::CheckVarTemplateId(
+ const CXXScopeSpec &SS, const DeclarationNameInfo &NameInfo,
+ VarTemplateDecl *Template, NamedDecl *FoundD, SourceLocation TemplateLoc,
+ const TemplateArgumentListInfo *TemplateArgs) {
DeclResult Decl = CheckVarTemplateId(Template, TemplateLoc,
NameInfo.getLoc(),
*TemplateArgs);
@@ -4978,8 +4977,7 @@ Sema::CheckVarTemplateId(const CXXScopeSpec &SS,
NameInfo.getLoc());
// Build an ordinary singleton decl ref.
- return BuildDeclarationNameExpr(SS, NameInfo, Var,
- /*FoundD=*/nullptr, TemplateArgs);
+ return BuildDeclarationNameExpr(SS, NameInfo, Var, FoundD, TemplateArgs);
}
void Sema::diagnoseMissingTemplateArguments(TemplateName Name,
@@ -5066,9 +5064,9 @@ ExprResult Sema::BuildTemplateIdExpr(const CXXScopeSpec
&SS,
bool KnownDependent = false;
// In C++1y, check variable template ids.
if (R.getAsSingle<VarTemplateDecl>()) {
- ExprResult Res = CheckVarTemplateId(SS, R.getLookupNameInfo(),
- R.getAsSingle<VarTemplateDecl>(),
- TemplateKWLoc, TemplateArgs);
+ ExprResult Res = CheckVarTemplateId(
+ SS, R.getLookupNameInfo(), R.getAsSingle<VarTemplateDecl>(),
+ R.getRepresentativeDecl(), TemplateKWLoc, TemplateArgs);
if (Res.isInvalid() || Res.isUsable())
return Res;
// Result is dependent. Carry on to build an UnresolvedLookupEpxr.
diff --git a/clang/test/AST/ast-dump-using.cpp
b/clang/test/AST/ast-dump-using.cpp
index 5a4e910ffb8654..8e5c60d3aabf4a 100644
--- a/clang/test/AST/ast-dump-using.cpp
+++ b/clang/test/AST/ast-dump-using.cpp
@@ -2,6 +2,7 @@
namespace a {
struct S;
+template <typename T> T x = {};
}
namespace b {
using a::S;
@@ -21,4 +22,10 @@ typedef S e; // check the same UsingType is reused.
// CHECK-NEXT: `-UsingType [[TYPE_ADDR]] 'a::S' sugar
// CHECK-NEXT: |-UsingShadow [[SHADOW_ADDR]] 'S'
// CHECK-NEXT: `-RecordType {{.*}} 'a::S'
+using a::x;
+
+void foo() {
+ x<int> = 3;
+ // CHECK: DeclRefExpr {{.*}} 'x' {{.*}} (UsingShadow {{.*}} 'x')
+}
}
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