MitalAshok updated this revision to Diff 543183.
MitalAshok edited the summary of this revision.
MitalAshok added a comment.
Added entry to changelog and the test from the bug report
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D154716/new/
https://reviews.llvm.org/D154716
Files:
clang/docs/ReleaseNotes.rst
clang/lib/Sema/SemaTemplateInstantiate.cpp
clang/lib/Sema/TreeTransform.h
clang/test/SemaCXX/lambda-pack-expansion.cpp
Index: clang/test/SemaCXX/lambda-pack-expansion.cpp
===================================================================
--- clang/test/SemaCXX/lambda-pack-expansion.cpp
+++ clang/test/SemaCXX/lambda-pack-expansion.cpp
@@ -21,3 +21,30 @@
take_by_ref(x);
}
}
+
+namespace GH63677 {
+
+template<typename>
+void f() {
+ []<typename... Ts>() -> void {
+ [...us = Ts{}]{
+ (Ts(us), ...);
+ };
+ }.template operator()<int, int>();
+}
+
+template void f<int>();
+
+template <class>
+inline constexpr auto fun =
+ []<class... Ts>(Ts... ts) {
+ return [... us = (Ts&&) ts]<class Fun>(Fun&& fn) mutable {
+ return static_cast<Fun&&>(fn)(static_cast<Ts&&>(us)...);
+ };
+ };
+
+void f() {
+ [[maybe_unused]] auto s = fun<int>(1, 2, 3, 4);
+}
+
+}
Index: clang/lib/Sema/TreeTransform.h
===================================================================
--- clang/lib/Sema/TreeTransform.h
+++ clang/lib/Sema/TreeTransform.h
@@ -13340,14 +13340,14 @@
OldVD->getInit()->getSourceRange(), Unexpanded, Expand,
RetainExpansion, NumExpansions))
return ExprError();
+ assert(!RetainExpansion && "Should not need to retain expansion after a "
+ "capture since it cannot be extended");
if (Expand) {
for (unsigned I = 0; I != *NumExpansions; ++I) {
Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(getSema(), I);
SubstInitCapture(SourceLocation(), std::nullopt);
}
- }
- if (!Expand || RetainExpansion) {
- ForgetPartiallySubstitutedPackRAII Forget(getDerived());
+ } else {
SubstInitCapture(ExpansionTL.getEllipsisLoc(), NumExpansions);
Result.EllipsisLoc = ExpansionTL.getEllipsisLoc();
}
Index: clang/lib/Sema/SemaTemplateInstantiate.cpp
===================================================================
--- clang/lib/Sema/SemaTemplateInstantiate.cpp
+++ clang/lib/Sema/SemaTemplateInstantiate.cpp
@@ -1270,7 +1270,8 @@
}
void transformedLocalDecl(Decl *Old, ArrayRef<Decl *> NewDecls) {
- if (Old->isParameterPack()) {
+ if (Old->isParameterPack() &&
+ (NewDecls.size() != 1 || !NewDecls.front()->isParameterPack())) {
SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(Old);
for (auto *New : NewDecls)
SemaRef.CurrentInstantiationScope->InstantiatedLocalPackArg(
Index: clang/docs/ReleaseNotes.rst
===================================================================
--- clang/docs/ReleaseNotes.rst
+++ clang/docs/ReleaseNotes.rst
@@ -782,6 +782,8 @@
(`#63903 <https://github.com/llvm/llvm-project/issues/63903>`_)
- Fix constraint checking of non-generic lambdas.
(`#63181 <https://github.com/llvm/llvm-project/issues/63181>`_)
+- Fix init-capture packs having a size of one before being instantiated
+ (`#63677 <https://github.com/llvm/llvm-project/issues/63677>`_)
Bug Fixes to AST Handling
^^^^^^^^^^^^^^^^^^^^^^^^^
Index: clang/test/SemaCXX/lambda-pack-expansion.cpp
===================================================================
--- clang/test/SemaCXX/lambda-pack-expansion.cpp
+++ clang/test/SemaCXX/lambda-pack-expansion.cpp
@@ -21,3 +21,30 @@
take_by_ref(x);
}
}
+
+namespace GH63677 {
+
+template<typename>
+void f() {
+ []<typename... Ts>() -> void {
+ [...us = Ts{}]{
+ (Ts(us), ...);
+ };
+ }.template operator()<int, int>();
+}
+
+template void f<int>();
+
+template <class>
+inline constexpr auto fun =
+ []<class... Ts>(Ts... ts) {
+ return [... us = (Ts&&) ts]<class Fun>(Fun&& fn) mutable {
+ return static_cast<Fun&&>(fn)(static_cast<Ts&&>(us)...);
+ };
+ };
+
+void f() {
+ [[maybe_unused]] auto s = fun<int>(1, 2, 3, 4);
+}
+
+}
Index: clang/lib/Sema/TreeTransform.h
===================================================================
--- clang/lib/Sema/TreeTransform.h
+++ clang/lib/Sema/TreeTransform.h
@@ -13340,14 +13340,14 @@
OldVD->getInit()->getSourceRange(), Unexpanded, Expand,
RetainExpansion, NumExpansions))
return ExprError();
+ assert(!RetainExpansion && "Should not need to retain expansion after a "
+ "capture since it cannot be extended");
if (Expand) {
for (unsigned I = 0; I != *NumExpansions; ++I) {
Sema::ArgumentPackSubstitutionIndexRAII SubstIndex(getSema(), I);
SubstInitCapture(SourceLocation(), std::nullopt);
}
- }
- if (!Expand || RetainExpansion) {
- ForgetPartiallySubstitutedPackRAII Forget(getDerived());
+ } else {
SubstInitCapture(ExpansionTL.getEllipsisLoc(), NumExpansions);
Result.EllipsisLoc = ExpansionTL.getEllipsisLoc();
}
Index: clang/lib/Sema/SemaTemplateInstantiate.cpp
===================================================================
--- clang/lib/Sema/SemaTemplateInstantiate.cpp
+++ clang/lib/Sema/SemaTemplateInstantiate.cpp
@@ -1270,7 +1270,8 @@
}
void transformedLocalDecl(Decl *Old, ArrayRef<Decl *> NewDecls) {
- if (Old->isParameterPack()) {
+ if (Old->isParameterPack() &&
+ (NewDecls.size() != 1 || !NewDecls.front()->isParameterPack())) {
SemaRef.CurrentInstantiationScope->MakeInstantiatedLocalArgPack(Old);
for (auto *New : NewDecls)
SemaRef.CurrentInstantiationScope->InstantiatedLocalPackArg(
Index: clang/docs/ReleaseNotes.rst
===================================================================
--- clang/docs/ReleaseNotes.rst
+++ clang/docs/ReleaseNotes.rst
@@ -782,6 +782,8 @@
(`#63903 <https://github.com/llvm/llvm-project/issues/63903>`_)
- Fix constraint checking of non-generic lambdas.
(`#63181 <https://github.com/llvm/llvm-project/issues/63181>`_)
+- Fix init-capture packs having a size of one before being instantiated
+ (`#63677 <https://github.com/llvm/llvm-project/issues/63677>`_)
Bug Fixes to AST Handling
^^^^^^^^^^^^^^^^^^^^^^^^^
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