[clang] [Sema][CTAD] Allow user defined conversion for copy-list-initialization (PR #94752)

[Haojian Wu via cfe-commits]

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@@ -0,0 +1,65 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -Wno-unused-value -std=c++20 %s
+
+namespace std {
+  typedef decltype(sizeof(int)) size_t;
+
+  template <typename E>
+  struct initializer_list
+  {
+    const E *p;
+    size_t n;
+    initializer_list(const E *p, size_t n) : p(p), n(n) {}
+  };
+
+  struct string {
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hokein wrote:

nit: this is not used.

https://github.com/llvm/llvm-project/pull/94752