================
@@ -305,3 +305,45 @@
static_assert(__is_same_as(_Three_way_comparison_result_with_tuple_like<tuple<in
static_assert(__is_same_as(_Three_way_comparison_result_with_tuple_like<tuple<int>,
0>::type, long));
}
+
+namespace GH88866 {
+
+template <typename...Ts> struct index_by;
+
+template <typename T, typename Indices>
+concept InitFunc = true;
+
+namespace Invalid {
+
+template <typename Indices, InitFunc<Indices> auto... init>
+struct LazyLitMatrix;
+
+template <
+ typename...Indices,
+ InitFunc<index_by<Indices>> auto... init
+ // expected-error@-1 {{type constraint contains unexpanded parameter pack
'Indices'}}
----------------
zyn0217 wrote:
Wow you're right, I was confused by the original case where there's no ellipsis
in the parameter declaration.
https://godbolt.org/z/9jaazxEqY
(Fun fact that GCC accepts both w/ or w/o ellipsis, which doesn't seem right.
We crash on both, sadly.)
https://github.com/llvm/llvm-project/pull/121296
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