[clang] [Sema][CTAD] Allow user defined conversion for copy-list-initialization (PR #94752)
Younan Zhang via cfe-commits
cfe-commits at lists.llvm.org
Sat Jun 8 21:10:20 PDT 2024
================
@@ -0,0 +1,90 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -Wno-unused-value -std=c++20 %s
+namespace std
+{
+ typedef long unsigned int size_t;
+}
+
+namespace std
+{
+ template<class _E>
+ class initializer_list
+ {
+ public:
+ typedef _E value_type;
+ typedef const _E& reference;
+ typedef const _E& const_reference;
+ typedef size_t size_type;
+ typedef const _E* iterator;
+ typedef const _E* const_iterator;
+
+ private:
+ iterator _M_array;
+ size_type _M_len;
+
+
+ constexpr initializer_list(const_iterator __a, size_type __l)
+ : _M_array(__a), _M_len(__l) { }
+
+ public:
+ constexpr initializer_list() noexcept
+ : _M_array(0), _M_len(0) { }
+
+
+ constexpr size_type
+ size() const noexcept { return _M_len; }
+
+
+ constexpr const_iterator
+ begin() const noexcept { return _M_array; }
+
+
+ constexpr const_iterator
+ end() const noexcept { return begin() + size(); }
+ };
+
+ template<class _Tp>
+ constexpr const _Tp*
+ begin(initializer_list<_Tp> __ils) noexcept
+ { return __ils.begin(); }
+
+ template<class _Tp>
+ constexpr const _Tp*
+ end(initializer_list<_Tp> __ils) noexcept
+ { return __ils.end(); }
+}
+
+template<class T, class Y>
+class pair{
+ private:
+ T fst;
+ Y snd;
+ public:
+ pair(T f, Y s) : fst(f), snd(s) {}
+};
+
+template<class T, class Y>
+class map {
+ public:
+ map(std::initializer_list<pair<T, Y>>, int a = 4, int b = 5) {}
+};
+
+template<class T, class Y>
+class Contained {
+ public:
+ Contained(T, Y) {}
+};
+
+template<class T, class Y>
+class A {
+ public:
+ A(std::initializer_list<Contained<T, Y> >, int) {}
+};
+
+int main() {
+ map mOk ={pair{5, 'a'}, {6, 'b'}, {7, 'c'}};
----------------
zyn0217 wrote:
Could you try to simplify the test case a bit? There is so much boilerplate that it's hard to understand the issue.
https://github.com/llvm/llvm-project/pull/94752
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