partial-ordering.cpp source code [clang_source_code/test/CXX/temp/temp.decls/temp.variadic/partial-ordering.cpp]

1	// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2	// expected-no-diagnostics
3
4	// Various tests related to partial ordering of variadic templates.
5	template<typename ...Types> struct tuple;
6
7	template<typename Tuple>
8	struct X1 {
9	static const unsigned value = 0;
10	};
11
12	template<typename Head, typename ...Tail>
13	struct X1<tuple<Head, Tail...> > {
14	static const unsigned value = 1;
15	};
16
17	template<typename Head, typename ...Tail>
18	struct X1<tuple<Head, Tail&...> > {
19	static const unsigned value = 2;
20	};
21
22	template<typename Head, typename ...Tail>
23	struct X1<tuple<Head&, Tail&...> > {
24	static const unsigned value = 3;
25	};
26
27	int check0[X1<tuple<>>::value == 0? 1 : -1];
28	int check1[X1<tuple<int>>::value == 2? 1 : -1];
29	int check2[X1<tuple<int, int>>::value == 1? 1 : -1];
30	int check3[X1<tuple<int, int&>>::value == 2? 1 : -1];
31	int check4[X1<tuple<int&, int&>>::value == 3? 1 : -1];
32
33	// Partial ordering of function templates.
34	template<typename T1, typename T2, typename ...Rest>
35	int &f0(T1, T2, Rest...);
36
37	template<typename T1, typename T2>
38	float &f0(T1, T2);
39
40	void test_f0() {
41	int &ir1 = f0(1, 2.0, 'a');
42	float &fr1 = f0(1, 2.0);
43	}
44
45	template<typename T1, typename T2, typename ...Rest>
46	int &f1(T1, T2, Rest...);
47
48	template<typename T1, typename T2>
49	float &f1(T1, T2, ...);
50
51	void test_f1() {
52	int &ir1 = f1(1, 2.0, 'a');
53	}
54
55	template<typename T1, typename T2, typename ...Rest>
56	int &f2(T1, T2, Rest...);
57
58	float &f2(...);
59
60	void test_f2() {
61	int &ir1 = f2(1, 2.0, 'a');
62	}
63

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