From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/g++.dg/cpp0x/variadic-tuple.C | 294 ++++++++++++++++++++++++++++ 1 file changed, 294 insertions(+) create mode 100644 gcc/testsuite/g++.dg/cpp0x/variadic-tuple.C (limited to 'gcc/testsuite/g++.dg/cpp0x/variadic-tuple.C') diff --git a/gcc/testsuite/g++.dg/cpp0x/variadic-tuple.C b/gcc/testsuite/g++.dg/cpp0x/variadic-tuple.C new file mode 100644 index 000000000..11ce14af2 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/variadic-tuple.C @@ -0,0 +1,294 @@ +// { dg-do run } +// { dg-options "-std=gnu++0x" } +// An implementation of TR1's using variadic teplates +// Contributed by Douglas Gregor + +#include +#include +#include + +// Trivial reference_wrapper +template +struct reference_wrapper +{ + reference_wrapper(T& x) : ptr(&x) { } + + operator T&() const { return *ptr; } + + T* ptr; +}; + +template reference_wrapper ref(T& x) { return x; } +template reference_wrapper cref(const T& x) { return x; } + +// Simple type-traits we'll need +template +struct add_reference +{ + typedef T& type; +}; + +template +struct add_reference +{ + typedef T& type; +}; + +template +struct is_same +{ + static const bool value = false; +}; + +template +struct is_same +{ + static const bool value = true; +}; + +// For creating the constructor parameters of tuple<> +template +struct add_const_reference +{ + typedef const T& type; +}; + +template +struct add_const_reference +{ + typedef T& type; +}; + +// 6.1.3 Class template tuple +template +class tuple; + +template<> class tuple<> { }; + +template +class tuple + : private tuple +{ + typedef tuple inherited; + + public: + tuple() { } + + // implicit copy-constructor is okay + + tuple(typename add_const_reference::type v, + typename add_const_reference::type... vtail) + : m_head(v), inherited(vtail...) { } + + 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; +}; + +template +struct make_tuple_result +{ + typedef T type; +}; + +template +struct make_tuple_result > +{ + typedef T& type; +}; + +// 6.1.3.2 Tuple creation functions +struct ignore_t { + template ignore_t& operator=(const T&) { return *this; } +} ignore; + +template +tuple::type...> +make_tuple(const Values&... values) +{ + return tuple::type...>(values...); +} + +template +tuple tie(Values&... values) +{ + return tuple(values...); +} + +// 6.1.3.3 Tuple helper classes +template +struct tuple_size; + +template<> +struct tuple_size > +{ + static const std::size_t value = 0; +}; + +template +struct tuple_size > +{ + static const std::size_t value = 1 + tuple_size >::value; +}; + +template +struct tuple_element; + +template +struct tuple_element > +{ + typedef typename tuple_element >::type type; +}; + +template +struct tuple_element<0, tuple > +{ + typedef Head type; +}; + +// 6.1.3.4 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); +} + +// 6.1.3.5 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); +} + +int a0[tuple_size >::value == 0? 1 : -1]; +int a1[tuple_size >::value == 3? 1 : -1]; +int a2a[is_same >::type, int> + ::value? 1 : -1]; +int a2b[is_same >::type, float> + ::value? 1 : -1]; +int a2c[is_same >::type, double> + ::value? 1 : -1]; + +int main() +{ + tuple<> t0; + tuple t1(1); + tuple t2(1, 3.14159f); + tuple t3a(1, 3.14159f, "Hello, world!"); + tuple t3b(t3a); + t3b = t3a; + // t3a = t3b; DPG: triggers an error, as it should. + + tuple t3c = + make_tuple(17, 2.718281828, std::string("Fun")); + + int seventeen = 17; + double pi = 3.14159; + tuple seventeen_pi = make_tuple(ref(seventeen), ref(pi)); + tuple seventeen_pi2 = + make_tuple(ref(seventeen), cref(pi)); + tuple seventeen_pi_tied = tie(seventeen, pi); + assert(get<0>(t3a) == 1); + assert(get<1>(t3a) == 3.14159f); + assert(std::strcmp(get<2>(t3a), "Hello, world!") == 0); + + assert(t3a == t3b); + assert(!(t3a != t3b)); + assert(!(t3a < t3b)); + assert(!(t3a > t3b)); + assert(t3a <= t3b && t3b <= t3a); + assert(t3a >= t3b && t3b >= t3a); +} -- cgit v1.2.3