[PATCH] D109406: [clang] fix transformation of template arguments of 'auto' type constraints
Matheus Izvekov via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Tue Sep 7 18:22:44 PDT 2021
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG68b9d8ed7abe: [clang] fix transformation of template arguments of 'auto' type constraints (authored by mizvekov).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D109406/new/
https://reviews.llvm.org/D109406
Files:
clang/lib/Sema/TreeTransform.h
clang/test/CXX/dcl/dcl.spec/dcl.type/dcl.spec.auto/p6.cpp
Index: clang/test/CXX/dcl/dcl.spec/dcl.type/dcl.spec.auto/p6.cpp
===================================================================
--- clang/test/CXX/dcl/dcl.spec/dcl.type/dcl.spec.auto/p6.cpp
+++ clang/test/CXX/dcl/dcl.spec/dcl.type/dcl.spec.auto/p6.cpp
@@ -76,3 +76,25 @@
template<class> concept d = true;
d<,> auto e = 0; // expected-error{{expected expression}}
}
+
+namespace PR48617 {
+ template <typename...> concept C = true;
+ template <typename...> class A {};
+
+ template <typename... Ts> C<Ts...> auto e(A<Ts...>) { return 0; }
+
+ // FIXME: The error here does not make sense.
+ template auto e<>(A<>);
+ // expected-error at -1 {{explicit instantiation of 'e' does not refer to a function template}}
+ // expected-note at -5 {{candidate template ignored: failed template argument deduction}}
+
+ // FIXME: Should be able to instantiate this with no errors.
+ template C<int> auto e<int>(A<int>);
+ // expected-error at -1 {{explicit instantiation of 'e' does not refer to a function template}}
+ // expected-note at -10 {{candidate template ignored: could not match 'C<int, Ts...> auto' against 'C<int> auto'}}
+
+ template C<> auto e<>(A<>);
+
+ template <typename... Ts> A<Ts...> c(Ts...);
+ int f = e(c(1, 2));
+}
Index: clang/lib/Sema/TreeTransform.h
===================================================================
--- clang/lib/Sema/TreeTransform.h
+++ clang/lib/Sema/TreeTransform.h
@@ -6578,7 +6578,7 @@
NewTL.setFoundDecl(TL.getFoundDecl());
NewTL.setLAngleLoc(TL.getLAngleLoc());
NewTL.setRAngleLoc(TL.getRAngleLoc());
- for (unsigned I = 0; I < TL.getNumArgs(); ++I)
+ for (unsigned I = 0; I < NewTL.getNumArgs(); ++I)
NewTL.setArgLocInfo(I, NewTemplateArgs.arguments()[I].getLocInfo());
return Result;
-------------- next part --------------
A non-text attachment was scrubbed...
Name: D109406.371228.patch
Type: text/x-patch
Size: 1767 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20210908/b1160c84/attachment.bin>
More information about the cfe-commits
mailing list