From 43144e72b5197c2e17a5586a59d41afe177d5055 Mon Sep 17 00:00:00 2001
From: Sebastian Redl <sebastian.redl@getdesigned.at>
Date: Tue, 17 Jan 2012 22:49:58 +0000
Subject: Template argument deduction for std::initializer_list arguments from
 initializer lists.

llvm-svn: 148352
---
 .../cxx0x-initializer-stdinitializerlist.cpp       | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp')

diff --git a/clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp b/clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp
index 87e7e8462ba..a08a04806ca 100644
--- a/clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp
+++ b/clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp
@@ -32,6 +32,11 @@ namespace std {
   };
 }
 
+template <typename T, typename U>
+struct same_type { static const bool value = false; };
+template <typename T>
+struct same_type<T, T> { static const bool value = true; };
+
 struct one { char c[1]; };
 struct two { char c[2]; };
 
@@ -87,3 +92,20 @@ void overloaded_call() {
     // But here, user-defined is worst in both cases.
     ov2({1, 2, D()}); // expected-error {{ambiguous}}
 }
+
+template <typename T>
+T deduce(std::initializer_list<T>); // expected-note {{conflicting types for parameter 'T' ('int' vs. 'double')}}
+template <typename T>
+T deduce_ref(const std::initializer_list<T>&); // expected-note {{conflicting types for parameter 'T' ('int' vs. 'double')}}
+
+void argument_deduction() {
+  static_assert(same_type<decltype(deduce({1, 2, 3})), int>::value, "bad deduction");
+  static_assert(same_type<decltype(deduce({1.0, 2.0, 3.0})), double>::value, "bad deduction");
+
+  deduce({1, 2.0}); // expected-error {{no matching function}}
+
+  static_assert(same_type<decltype(deduce_ref({1, 2, 3})), int>::value, "bad deduction");
+  static_assert(same_type<decltype(deduce_ref({1.0, 2.0, 3.0})), double>::value, "bad deduction");
+
+  deduce_ref({1, 2.0}); // expected-error {{no matching function}}
+}
-- 
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