From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001 From: "Zancanaro; Carlo" Date: Mon, 24 Sep 2012 09:58:17 +1000 Subject: Add the clang library to the repo (with some of my changes, too). --- .../temp.decls/temp.variadic/example-tuple.cpp | 260 +++++++++++++++++++++ 1 file changed, 260 insertions(+) create mode 100644 clang/test/CXX/temp/temp.decls/temp.variadic/example-tuple.cpp (limited to 'clang/test/CXX/temp/temp.decls/temp.variadic/example-tuple.cpp') diff --git a/clang/test/CXX/temp/temp.decls/temp.variadic/example-tuple.cpp b/clang/test/CXX/temp/temp.decls/temp.variadic/example-tuple.cpp new file mode 100644 index 0000000..9de5fa8 --- /dev/null +++ b/clang/test/CXX/temp/temp.decls/temp.variadic/example-tuple.cpp @@ -0,0 +1,260 @@ +// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s + +// Example tuple implementation from the variadic templates proposal, +// ISO C++ committee document number N2080. + +// Helper type traits +template +struct add_reference { + typedef T &type; +}; + +template +struct add_reference { + typedef T &type; +}; + +template +struct add_const_reference { + typedef T const &type; +}; + +template +struct add_const_reference { + typedef T &type; +}; + +template +struct is_same { + static const bool value = false; +}; + +template +struct is_same { + static const bool value = true; +}; + +template +class reference_wrapper { + T *ptr; + +public: + reference_wrapper(T& t) : ptr(&t) { } + operator T&() const { return *ptr; } +}; + +template reference_wrapper ref(T& t) { + return reference_wrapper(t); +} +template reference_wrapper cref(const T& t) { + return reference_wrapper(t); +} + +template class tuple; + +// Basis case: zero-length tuple +template<> class tuple<> { }; + +template +class tuple : private tuple { + typedef tuple inherited; + +public: + tuple() { } + // implicit copy-constructor is okay + + // Construct tuple from separate arguments. + tuple(typename add_const_reference::type v, + typename add_const_reference::type... vtail) + : m_head(v), inherited(vtail...) { } + + // Construct tuple from another tuple. + template tuple(const tuple& other) + : m_head(other.head()), inherited(other.tail()) { } + + template tuple& + operator=(const tuple& other) { + m_head = other.head(); + tail() = other.tail(); + return *this; + } + + typename add_reference::type head() { return m_head; } + typename add_reference::type head() const { return m_head; } + inherited& tail() { return *this; } + const inherited& tail() const { return *this; } + +protected: + Head m_head; +}; + +void test_tuple() { + tuple<> t0a; + tuple<> t0b(t0a); + t0a = t0b; + + tuple t1a; + tuple t1b(17); + tuple t1c(t1b); + t1a = t1b; + + tuple t1d(3.14159); + tuple t1e(t1d); + t1d = t1e; + + int i; + float f; + double d; + tuple t3a(&i, &f, &d); +} + +// Creation functions +template +struct make_tuple_result { + typedef T type; +}; + +template +struct make_tuple_result > { + typedef T& type; +}; + +template +tuple::type...> +make_tuple(const Values&... values) { + return tuple::type...>(values...); +} + +template +tuple tie(Values&... values) { + return tuple(values...); +} + +template const T *addr(const T& ref) { return &ref; } +void test_creation_functions() { + int i; + float f; + double d; + const tuple *t3p = addr(make_tuple(i, ref(f), cref(d))); + const tuple *t3q = addr(tie(i, f, d)); +} + +// Helper classes +template struct tuple_size; + +template struct tuple_size > { + static const int value = sizeof...(Values); +}; + +int check_tuple_size_0[tuple_size >::value == 0? 1 : -1]; +int check_tuple_size_1[tuple_size>::value == 1? 1 : -1]; +int check_tuple_size_2[tuple_size>::value == 2? 1 : -1]; +int check_tuple_size_3[tuple_size>::value == 3? 1 : -1]; + +template struct tuple_element; + +template +struct tuple_element > { + typedef typename tuple_element >::type type; +}; + +template +struct tuple_element<0, tuple > { + typedef Head type; +}; + +int check_tuple_element_0[is_same>::type, + int&>::value? 1 : -1]; + +int check_tuple_element_1[is_same>::type, + float>::value? 1 : -1]; + +int check_tuple_element_2[is_same>::type, + double>::value? 1 : -1]; + +// Element access +template class get_impl; +template +class get_impl > { + typedef typename tuple_element >::type Element; + typedef typename add_reference::type RJ; + typedef typename add_const_reference::type PJ; + typedef get_impl > Next; +public: + static RJ get(tuple& t) { return Next::get(t.tail()); } + static PJ get(const tuple& t) { return Next::get(t.tail()); } +}; + +template +class get_impl<0, tuple > { + typedef typename add_reference::type RJ; + typedef typename add_const_reference::type PJ; +public: + static RJ get(tuple& t) { return t.head(); } + static PJ get(const tuple& t) { return t.head(); } +}; + +template typename add_reference< +typename tuple_element >::type >::type +get(tuple& t) { + return get_impl >::get(t); +} + +template typename add_const_reference< +typename tuple_element >::type >::type +get(const tuple& t) { + return get_impl >::get(t); +} + +void test_element_access(tuple t3) { + int i; + float f; + double d; + get<0>(t3) = &i; + get<1>(t3) = &f; + get<2>(t3) = &d; +} + +// Relational operators +inline bool operator==(const tuple<>&, const tuple<>&) { return true; } + +template +bool operator==(const tuple& t, const tuple& u) { + return t.head() == u.head() && t.tail() == u.tail(); +} + +template +bool operator!=(const tuple& t, const tuple& u) { + return !(t == u); +} + +inline bool operator<(const tuple<>&, const tuple<>&) { return false; } + +template +bool operator<(const tuple& t, const tuple& u) { + return (t.head() < u.head() || (!(t.head() < u.head()) && t.tail() < u.tail())); +} + +template +bool operator>(const tuple& t, const tuple& u) { + return u < t; +} + +template +bool operator<=(const tuple& t, const tuple& u) { + return !(u < t); +} + +template +bool operator>=(const tuple& t, const tuple& u) { + return !(t < u); +} + +void test_relational_operators(tuple t3) { + (void)(t3 == t3); + (void)(t3 != t3); + (void)(t3 < t3); + (void)(t3 <= t3); + (void)(t3 >= t3); + (void)(t3 > t3); +}; -- cgit v1.2.3