feedc0de/boost_unordered
1
0
Fork 0
forked from boostorg/unordered
Code Pull Requests Activity

Manually write out emplace_args for small numbers.

Browse Source 
Still need some macros to handle rvalue reference support.
This commit is contained in:
Daniel James
2016-09-30 00:32:19 +01:00
parent 021817f2b4
commit 9decbe0cbd
1 changed files with 94 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

125
include/boost/unordered/detail/allocate.hpp
View File

@ -96,20 +96,109 @@ namespace boost { namespace unordered { namespace detail {
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
#define BOOST_UNORDERED_EMPLACE_TEMPLATE typename... Args
#define BOOST_UNORDERED_EMPLACE_ARGS BOOST_FWD_REF(Args)... args
#define BOOST_UNORDERED_EMPLACE_FORWARD boost::forward<Args>(args)...
#define BOOST_UNORDERED_EMPLACE_ARGS1(a0) a0
#define BOOST_UNORDERED_EMPLACE_ARGS2(a0, a1) a0, a1
#define BOOST_UNORDERED_EMPLACE_ARGS3(a0, a1, a2) a0, a1, a2
#define BOOST_UNORDERED_EMPLACE_TEMPLATE typename... Args
#define BOOST_UNORDERED_EMPLACE_ARGS BOOST_FWD_REF(Args)... args
#define BOOST_UNORDERED_EMPLACE_FORWARD boost::forward<Args>(args)...
#else
#define BOOST_UNORDERED_EMPLACE_ARGS1 create_emplace_args
#define BOOST_UNORDERED_EMPLACE_ARGS2 create_emplace_args
#define BOOST_UNORDERED_EMPLACE_ARGS3 create_emplace_args
#define BOOST_UNORDERED_EMPLACE_TEMPLATE typename Args
#define BOOST_UNORDERED_EMPLACE_ARGS Args const& args
#define BOOST_UNORDERED_EMPLACE_FORWARD args
#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
#define BOOST_UNORDERED_EARGS_MEMBER(z, n, _) \
typedef BOOST_FWD_REF(BOOST_PP_CAT(A, n)) BOOST_PP_CAT(Arg, n); \
BOOST_PP_CAT(Arg, n) BOOST_PP_CAT(a, n);
#define BOOST_UNORDERED_EARGS_INIT(z, n, _) \
BOOST_PP_CAT(a, n)( \
boost::forward<BOOST_PP_CAT(A,n)>(BOOST_PP_CAT(b, n)))
#else
#define BOOST_UNORDERED_EARGS_MEMBER(z, n, _) \
typedef typename boost::add_lvalue_reference<BOOST_PP_CAT(A, n)>::type \
BOOST_PP_CAT(Arg, n); \
BOOST_PP_CAT(Arg, n) BOOST_PP_CAT(a, n);
#define BOOST_UNORDERED_EARGS_INIT(z, n, _) \
BOOST_PP_CAT(a, n)(BOOST_PP_CAT(b, n))
#endif
template <typename A0>
struct emplace_args1
{
BOOST_UNORDERED_EARGS_MEMBER(1, 0, _)
emplace_args1(Arg0 b0) :
BOOST_UNORDERED_EARGS_INIT(1, 0, _)
{}
};
template <typename A0>
inline emplace_args1<A0> create_emplace_args(
BOOST_FWD_REF(A0) b0)
{
emplace_args1<A0> e(b0);
return e;
}
template <typename A0, typename A1>
struct emplace_args2
{
BOOST_UNORDERED_EARGS_MEMBER(1, 0, _)
BOOST_UNORDERED_EARGS_MEMBER(1, 1, _)
emplace_args2(Arg0 b0, Arg1 b1) :
BOOST_UNORDERED_EARGS_INIT(1, 0, _),
BOOST_UNORDERED_EARGS_INIT(1, 1, _)
{}
};
template <typename A0, typename A1>
inline emplace_args2<A0, A1> create_emplace_args(
BOOST_FWD_REF(A0) b0,
BOOST_FWD_REF(A1) b1)
{
emplace_args2<A0, A1> e(b0, b1);
return e;
}
template <typename A0, typename A1, typename A2>
struct emplace_args3
{
BOOST_UNORDERED_EARGS_MEMBER(1, 0, _)
BOOST_UNORDERED_EARGS_MEMBER(1, 1, _)
BOOST_UNORDERED_EARGS_MEMBER(1, 2, _)
emplace_args3(Arg0 b0, Arg1 b1, Arg2 b2) :
BOOST_UNORDERED_EARGS_INIT(1, 0, _),
BOOST_UNORDERED_EARGS_INIT(1, 1, _),
BOOST_UNORDERED_EARGS_INIT(1, 2, _)
{}
};
template <typename A0, typename A1, typename A2>
inline emplace_args3<A0, A1, A2> create_emplace_args(
BOOST_FWD_REF(A0) b0,
BOOST_FWD_REF(A1) b1,
BOOST_FWD_REF(A2) b2)
{
emplace_args3<A0, A1, A2> e(b0, b1, b2);
return e;
}
#define BOOST_UNORDERED_FWD_PARAM(z, n, a) \
BOOST_FWD_REF(BOOST_PP_CAT(A, n)) BOOST_PP_CAT(a, n)
@ -141,33 +230,7 @@ namespace boost { namespace unordered { namespace detail {
return e; \
}
#define BOOST_UNORDERED_EMPLACE_ARGS1 create_emplace_args
#define BOOST_UNORDERED_EMPLACE_ARGS2 create_emplace_args
#define BOOST_UNORDERED_EMPLACE_ARGS3 create_emplace_args
#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
#define BOOST_UNORDERED_EARGS_MEMBER(z, n, _) \
typedef BOOST_FWD_REF(BOOST_PP_CAT(A, n)) BOOST_PP_CAT(Arg, n); \
BOOST_PP_CAT(Arg, n) BOOST_PP_CAT(a, n);
#define BOOST_UNORDERED_EARGS_INIT(z, n, _) \
BOOST_PP_CAT(a, n)( \
boost::forward<BOOST_PP_CAT(A,n)>(BOOST_PP_CAT(b, n)))
#else
#define BOOST_UNORDERED_EARGS_MEMBER(z, n, _) \
typedef typename boost::add_lvalue_reference<BOOST_PP_CAT(A, n)>::type \
BOOST_PP_CAT(Arg, n); \
BOOST_PP_CAT(Arg, n) BOOST_PP_CAT(a, n);
#define BOOST_UNORDERED_EARGS_INIT(z, n, _) \
BOOST_PP_CAT(a, n)(BOOST_PP_CAT(b, n))
#endif
BOOST_PP_REPEAT_FROM_TO(1, BOOST_UNORDERED_EMPLACE_LIMIT, BOOST_UNORDERED_EARGS,
BOOST_PP_REPEAT_FROM_TO(4, BOOST_UNORDERED_EMPLACE_LIMIT, BOOST_UNORDERED_EARGS,
_)
#undef BOOST_UNORDERED_DEFINE_EMPLACE_ARGS