#ifndef BOOST_PP_IS_ITERATING
///////////////////////////////////////////////////////////////////////////////
// Copyright 2008 Eric Niebler. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// This example contains a full-featured reimplementation of the old,
// now-deprecated Boost Lambda Library (BLL) on top of Boost.Proto. It
// is necessarily complex to accomodate all the quirks and inconsistencies
// of that old library, but it is a good example of how to build a
// complete and full-featured EDLS using Proto.
#ifndef BOOST_LAMBDA_HPP_EAN_04_19_2008
#define BOOST_LAMBDA_HPP_EAN_04_19_2008
#include <iosfwd>
#include <typeinfo>
#include <algorithm>
#include <boost/ref.hpp>
#include <boost/assert.hpp>
#include <boost/mpl/or.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/void.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/mpl/next_prior.hpp>
#include <boost/mpl/min_max.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/preprocessor.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/utility/result_of.hpp>
#include <boost/fusion/include/vector.hpp>
#include <boost/type_traits/add_reference.hpp>
#include <boost/type_traits/remove_reference.hpp>
#include <boost/type_traits/remove_const.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/proto/proto.hpp>
#ifndef BOOST_LAMBDA_MAX_ARITY
# define BOOST_LAMBDA_MAX_ARITY 3
#endif
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable: 4355) // 'this' : used in base member initializer list
# pragma warning(disable: 4065) // switch statement contains 'default' but no 'case' labels
#endif
namespace boost { namespace lambda
{
namespace tag
{
struct if_ {};
struct if_else_ {};
struct for_ {};
struct while_ {};
struct do_while_ {};
struct protect {};
struct try_ {};
struct throw_ {};
struct rethrow_ {};
struct switch_ {};
struct default_ {};
template<int I> struct case_ { static const int value = I; };
template<typename E> struct catch_ { typedef E exception_type; };
struct catch_all_ { typedef catch_all_ exception_type; };
};
template<typename Int>
struct placeholder
{
typedef typename Int::tag tag;
typedef typename Int::value_type value_type;
typedef placeholder<Int> type;
typedef placeholder<typename Int::next> next;
typedef placeholder<typename Int::prior> prior;
static const value_type value = Int::value;
friend std::ostream &operator<<(std::ostream &sout, placeholder)
{
return sout << "boost::lambda::_" << (Int::value+1);
}
};
struct exception_placeholder
{};
struct no_exception_type {};
no_exception_type const no_exception = {};
// Calculate the arity of a lambda expression
struct Arity
: proto::or_<
proto::when<proto::terminal<placeholder<proto::_> >, mpl::next<proto::_value>()>
, proto::when<proto::terminal<proto::_>, mpl::int_<0>()>
, proto::otherwise<proto::fold<proto::_, mpl::int_<0>(), mpl::max<proto::_state, Arity>()> >
>
{};
// True when a lambda expression can be applied with no arguments and
// without an active exception object
struct IsNullary
: proto::or_<
proto::when<proto::terminal<placeholder<proto::_> >, mpl::false_()>
, proto::when<proto::terminal<exception_placeholder>, mpl::false_()>
, proto::when<proto::terminal<proto::_>, mpl::true_()>
, proto::otherwise<proto::fold<proto::_, mpl::true_(), mpl::and_<proto::_state, IsNullary>()> >
>
{};
struct Eval;
struct EvalWhile : proto::transform<EvalWhile>
{
template<typename Expr, typename State, typename Data>
struct impl : proto::transform_impl<Expr, State, Data>
{
typedef mpl::void_ result_type;
result_type operator()(
typename impl::expr_param expr
, typename impl::state_param state
, typename impl::data_param data
) const
{
while(Eval()(proto::left(expr), state, data))
{
Eval()(proto::right(expr), state, data);
}
return result_type();
}
};
};
struct EvalDoWhile : proto::transform<EvalDoWhile>
{
template<typename Expr, typename State, typename Data>
struct impl : proto::transform_impl<Expr, State, Data>
{
typedef mpl::void_ result_type;
result_type operator()(
typename impl::expr_param expr
, typename impl::state_param state
, typename impl::data_param data
) const
{
do
{
Eval()(proto::child_c<0>(expr), state, data);
}
while(Eval()(proto::child_c<1>(expr), state, data));
return result_type();
}
};
};
struct EvalFor : proto::transform<EvalFor>
{
template<typename Expr, typename State, typename Data>
struct impl : proto::transform_impl<Expr, State, Data>
{
typedef mpl::void_ result_type;
result_type operator()(
typename impl::expr_param expr
, typename impl::state_param state
, typename impl::data_param data
) const
{
for(Eval()(proto::child_c<0>(expr), state, data)
; Eval()(proto::child_c<1>(expr), state, data)
; Eval()(proto::child_c<2>(expr), state, data))
{
Eval()(proto::child_c<3>(expr), state, data);
}
return result_type();
}
};
};
struct EvalIf : proto::transform<EvalIf>
{
template<typename Expr, typename State, typename Data>
struct impl : proto::transform_impl<Expr, State, Data>
{
typedef mpl::void_ result_type;
result_type operator()(
typename impl::expr_param expr
, typename impl::state_param state
, typename impl::data_param data
) const
{
if(Eval()(proto::left(expr), state, data))
{
Eval()(proto::right(expr), state, data);
}
return result_type();
}
};
};
struct EvalIfElse : proto::transform<EvalIfElse>
{
template<typename Expr, typename State, typename Data>
struct impl : proto::transform_impl<Expr, State, Data>
{
typedef mpl::void_ result_type;
result_type operator()(
typename impl::expr_param expr
, typename impl::state_param state
, typename impl::data_param data
) const
{
if(Eval()(proto::child_c<0>(expr), state, data))
{
Eval()(proto::child_c<1>(expr), state, data);
}
else
{
Eval()(proto::child_c<2>(expr), state, data);
}
return result_type();
}
};
};
struct EvalException : proto::transform<EvalException>
{
template<typename Expr, typename State, typename Data>
struct impl : proto::transform_impl<Expr, State, Data>
{
typedef typename remove_const<typename impl::state>::type result_type;
BOOST_MPL_ASSERT_NOT((is_same<result_type, no_exception_type>));
BOOST_MPL_ASSERT_NOT((is_same<result_type, tag::catch_all_>));
typename impl::state_param operator()(
typename impl::expr_param
, typename impl::state_param state
, typename impl::data_param
) const
{
return state;
}
};
};
struct EvalSwitch : proto::transform<EvalSwitch>
{
template<typename Expr, typename State, typename Data, long Arity, typename BackTag>
struct impl2;
#define M0(Z, N, DATA) \
case proto::tag_of<typename proto::result_of::child_c<Expr, N>::type>::type::value: \
Eval()(proto::child_c<N>(expr), state, data); \
break; \
/**/
#define M1(Z, N, DATA) \
template<typename Expr, typename State, typename Data, typename BackTag> \
struct impl2<Expr, State, Data, N, BackTag> \
: proto::transform_impl<Expr, State, Data> \
{ \
typedef void result_type; \
\
void operator()( \
typename impl2::expr_param expr \
, typename impl2::state_param state \
, typename impl2::data_param data \
) const \
{ \
switch(Eval()(proto::child_c<0>(expr), state, data)) \
{ \
BOOST_PP_REPEAT_FROM_TO_ ## Z(1, N, M0, ~) \
default: \
break; \
} \
} \
}; \
\
template<typename Expr, typename State, typename Data> \
struct impl2<Expr, State, Data, N, tag::default_> \
: proto::transform_impl<Expr, State, Data> \
{ \
typedef void result_type; \
\
void operator()( \
typename impl2::expr_param expr \
, typename impl2::state_param state \
, typename impl2::data_param data \
) const \
{ \
switch(Eval()(proto::child_c<0>(expr), state, data)) \
{ \
BOOST_PP_REPEAT_FROM_TO_ ## Z(1, BOOST_PP_DEC(N), M0, ~) \
default:; \
Eval()(proto::child_c<BOOST_PP_DEC(N)>(expr), state, data); \
break; \
} \
} \
}; \
/**/
BOOST_PP_REPEAT_FROM_TO(2, BOOST_PP_INC(BOOST_PROTO_MAX_ARITY), M1, ~)
#undef M0
#undef M1
template<typename Expr, typename State, typename Data>
struct impl
: impl2<
Expr
, State
, Data
, proto::arity_of<Expr>::value
, typename proto::tag_of<
typename proto::result_of::child_c<
Expr
, proto::arity_of<Expr>::value-1
>::type
>::type
>
{};
};
struct throw_fun
{
BOOST_PROTO_CALLABLE()
typedef void result_type;
template<typename Expr>
void operator()(Expr const &e) const
{
throw e;
}
};
struct unwrap_ref : proto::callable
{
template<typename Sig>
struct result;
template<typename This, typename T>
struct result<This(reference_wrapper<T>)>
{
typedef T &type;
};
template<typename This, typename T>
struct result<This(T &)>
: result<This(T)>
{};
template<typename T>
T &operator()(reference_wrapper<T> const &ref) const
{
return ref;
}
};
struct anytype
{
template<typename T>
anytype(T &) { BOOST_ASSERT(false); }
template<typename T>
operator T &() const { BOOST_ASSERT(false); throw; }
private:
anytype();
};
struct rethrow_fun
{
BOOST_PROTO_CALLABLE()
typedef anytype result_type;
template<typename State>
anytype operator()(State const &) const
{
BOOST_MPL_ASSERT_NOT((is_same<State, no_exception_type>));
throw;
}
};
struct Cases
{
template<typename Tag>
struct case_
: proto::otherwise<proto::_default<Eval> >
{};
template<typename E>
struct case_<tag::catch_<E> >
: proto::otherwise<Eval(proto::_child)>
{};
template<int I>
struct case_<tag::case_<I> >
: proto::otherwise<Eval(proto::_child)>
{};
};
template<> struct Cases::case_<tag::while_> : proto::otherwise<EvalWhile> {};
template<> struct Cases::case_<tag::for_> : proto::otherwise<EvalFor> {};
template<> struct Cases::case_<tag::if_> : proto::otherwise<EvalIf> {};
template<> struct Cases::case_<tag::if_else_> : proto::otherwise<EvalIfElse> {};
template<> struct Cases::case_<tag::do_while_> : proto::otherwise<EvalDoWhile> {};
template<> struct Cases::case_<tag::switch_> : proto::otherwise<EvalSwitch> {};
template<> struct Cases::case_<tag::protect> : proto::otherwise<proto::_child> {};
template<> struct Cases::case_<tag::default_> : proto::otherwise<Eval(proto::_child)> {};
template<> struct Cases::case_<tag::catch_all_> : proto::otherwise<Eval(proto::_child)> {};
template<>
struct Cases::case_<proto::tag::terminal>
: proto::or_<
proto::when<
proto::terminal<placeholder<proto::_> >
, proto::functional::at(proto::_data, proto::_value)
>
, proto::when<
proto::terminal<exception_placeholder>
, EvalException
>
, proto::when<
proto::terminal<reference_wrapper<proto::_> >
, unwrap_ref(proto::_value)
>
, proto::otherwise<proto::_default<Eval> >
>
{};
template<>
struct Cases::case_<proto::tag::function>
: proto::or_<
proto::when<
proto::function<proto::terminal<rethrow_fun> >
, rethrow_fun(proto::_state)
>
, proto::otherwise<proto::_default<Eval> >
>
{};
struct Eval
: proto::switch_<Cases>
{};
// Use a grammar to disable Proto's assignment operator overloads.
// We'll define our own because we want (x+=_1) to store x by
// reference. (In all other cases, variables are stored by value
// within lambda expressions.)
struct Grammar
: proto::switch_<struct AssignOps>
{};
struct AssignOps
{
template<typename Tag> struct case_ : proto::_ {};
};
template<> struct AssignOps::case_<proto::tag::shift_left_assign> : proto::not_<proto::_> {};
template<> struct AssignOps::case_<proto::tag::shift_right_assign> : proto::not_<proto::_> {};
template<> struct AssignOps::case_<proto::tag::multiplies_assign> : proto::not_<proto::_> {};
template<> struct AssignOps::case_<proto::tag::divides_assign> : proto::not_<proto::_> {};
template<> struct AssignOps::case_<proto::tag::modulus_assign> : proto::not_<proto::_> {};
template<> struct AssignOps::case_<proto::tag::plus_assign> : proto::not_<proto::_> {};
template<> struct AssignOps::case_<proto::tag::minus_assign> : proto::not_<proto::_> {};
template<> struct AssignOps::case_<proto::tag::bitwise_and_assign> : proto::not_<proto::_> {};
template<> struct AssignOps::case_<proto::tag::bitwise_or_assign> : proto::not_<proto::_> {};
template<> struct AssignOps::case_<proto::tag::bitwise_xor_assign> : proto::not_<proto::_> {};
namespace exprns_
{
template<typename Expr>
struct llexpr;
}
using exprns_::llexpr;
// Wrap expressions in lambda::llexpr<>.
struct Generator
: proto::pod_generator<llexpr>
{};
// The domain for the lambda library.
struct lldomain
: proto::domain<Generator, Grammar, proto::default_domain>
{
// Make all terminals and children held by value instead of by reference.
// Proto::domain<>::as_expr<> holds everything it can by value; the only
// exceptions are function types, abstract types, and iostreams.
template<typename T>
struct as_child
: proto_base_domain::as_expr<T>
{};
// The exception is arrays, which should still be held by reference
template<typename T, std::size_t N>
struct as_child<T[N]>
: proto_base_domain::as_child<T[N]>
{};
};
template<typename Sig>
struct llresult;
template<typename This>
struct llresult<This()>
: mpl::if_c<
result_of<IsNullary(This &)>::type::value
, result_of<Eval(This &, no_exception_type const &, fusion::vector0<> &)>
, mpl::identity<void>
>::type
{};
#define M0(Z, N, DATA) \
template<typename This BOOST_PP_ENUM_TRAILING_PARAMS_Z(Z, N, typename A)> \
struct llresult<This(BOOST_PP_ENUM_PARAMS_Z(Z, N, A))> \
: result_of< \
Eval( \
This & \
, no_exception_type const & \
, BOOST_PP_CAT(fusion::vector, N)<BOOST_PP_ENUM_PARAMS_Z(Z, N, A)> & \
) \
> \
{}; \
/**/
BOOST_PP_REPEAT_FROM_TO(1, BOOST_PP_INC(BOOST_LAMBDA_MAX_ARITY), M0, ~)
#undef M0
template<typename Expr>
struct llexpr
{
BOOST_PROTO_BASIC_EXTENDS(Expr, llexpr<Expr>, lldomain)
BOOST_PROTO_EXTENDS_ASSIGN()
BOOST_PROTO_EXTENDS_SUBSCRIPT()
template<typename Sig>
struct result
: llresult<Sig>
{};
typename result<llexpr const()>::type
operator()() const
{
fusion::vector0<> args;
return Eval()(*this, no_exception, args);
}
#define M1(Z, N, _) ((0)(1))
#define M2(R, PRODUCT) M3(R, BOOST_PP_SEQ_SIZE(PRODUCT), PRODUCT)
#define M3(R, SIZE, PRODUCT) \
template<BOOST_PP_ENUM_PARAMS(SIZE, typename A)> \
typename result<llexpr const(BOOST_PP_SEQ_FOR_EACH_I_R(R, M5, ~, PRODUCT))>::type \
operator ()(BOOST_PP_SEQ_FOR_EACH_I_R(R, M4, ~, PRODUCT)) const \
{ \
BOOST_MPL_ASSERT_RELATION(result_of<Arity(Expr const &)>::type::value, <=, SIZE); \
BOOST_PP_CAT(fusion::vector, SIZE)<BOOST_PP_SEQ_FOR_EACH_I_R(R, M5, ~, PRODUCT)> args \
(BOOST_PP_SEQ_FOR_EACH_I_R(R, M6, ~, PRODUCT)); \
return Eval()(*this, no_exception, args); \
} \
/**/
#define M4(R, _, I, ELEM) \
BOOST_PP_COMMA_IF(I) BOOST_PP_CAT(A, I) BOOST_PP_CAT(C, ELEM) &BOOST_PP_CAT(a, I) \
/**/
#define M5(R, _, I, ELEM) \
BOOST_PP_COMMA_IF(I) BOOST_PP_CAT(A, I) BOOST_PP_CAT(C, ELEM)& \
/**/
#define M6(R, _, I, ELEM) \
BOOST_PP_COMMA_IF(I) BOOST_PP_CAT(a, I) \
/**/
#define C0
#define C1 const
#define BOOST_PP_ITERATION_PARAMS_1 (3, (1, BOOST_LAMBDA_MAX_ARITY, "./lambda.hpp"))
#include BOOST_PP_ITERATE()
#undef C0
#undef C1
#undef M1
#undef M2
#undef M3
#undef M4
#undef M5
#undef M6
};
typedef llexpr<proto::terminal<placeholder<mpl::int_<0> > >::type> placeholder1_type;
typedef llexpr<proto::terminal<placeholder<mpl::int_<1> > >::type> placeholder2_type;
typedef llexpr<proto::terminal<placeholder<mpl::int_<2> > >::type> placeholder3_type;
placeholder1_type const _1 = {{{}}};
placeholder2_type const _2 = {{{}}};
placeholder3_type const _3 = {{{}}};
placeholder1_type const free1 = {{{}}};
placeholder2_type const free2 = {{{}}};
placeholder3_type const free3 = {{{}}};
typedef llexpr<proto::terminal<exception_placeholder>::type> placeholderE_type;
placeholderE_type const _e = {{{}}};
struct byref
{
template<typename Sig>
struct result;
template<typename This, typename T>
struct result<This(T &)>
{
typedef llexpr<typename proto::terminal<T &>::type> type;
};
template<typename This, typename T>
struct result<This(llexpr<T> &)>
{
typedef boost::reference_wrapper<llexpr<T> > type;
};
template<typename This, typename T>
struct result<This(llexpr<T> const &)>
{
typedef boost::reference_wrapper<llexpr<T> const> type;
};
template<typename T>
typename result<byref(T &)>::type operator()(T &t) const
{
typename result<byref(T &)>::type that = {{t}};
return that;
}
template<typename T>
typename result<byref(T const &)>::type operator()(T const &t) const
{
typename result<byref(T const &)>::type that = {{t}};
return that;
}
template<typename T>
boost::reference_wrapper<llexpr<T> > operator()(llexpr<T> &t) const
{
return boost::ref(t);
}
template<typename T>
boost::reference_wrapper<llexpr<T> const> operator()(llexpr<T> const &t) const
{
return boost::ref(t);
}
};
namespace exprns_
{
// Ugh, the assign operators (and only the assign operators) store
// their left terminals by reference. That requires this special handling.
#define BOOST_LAMBDA_DEFINE_ASSIGN_OP(OP, TAG) \
template<typename T, typename U> \
typename proto::result_of::make_expr< \
TAG \
, lldomain \
, typename boost::result_of<byref(T &)>::type \
, U & \
>::type const \
operator OP(T &t, U &u) \
{ \
return proto::make_expr<TAG, lldomain>(byref()(t), boost::ref(u)); \
} \
template<typename T, typename U> \
typename proto::result_of::make_expr< \
TAG \
, lldomain \
, typename boost::result_of<byref(T &)>::type \
, U const & \
>::type const \
operator OP(T &t, U const &u) \
{ \
return proto::make_expr<TAG, lldomain>(byref()(t), boost::ref(u)); \
} \
/**/
BOOST_LAMBDA_DEFINE_ASSIGN_OP(<<=, boost::proto::tag::shift_left_assign)
BOOST_LAMBDA_DEFINE_ASSIGN_OP(>>=, boost::proto::tag::shift_right_assign)
BOOST_LAMBDA_DEFINE_ASSIGN_OP(*= , boost::proto::tag::multiplies_assign)
BOOST_LAMBDA_DEFINE_ASSIGN_OP(/= , boost::proto::tag::divides_assign)
BOOST_LAMBDA_DEFINE_ASSIGN_OP(%= , boost::proto::tag::modulus_assign)
BOOST_LAMBDA_DEFINE_ASSIGN_OP(+= , boost::proto::tag::plus_assign)
BOOST_LAMBDA_DEFINE_ASSIGN_OP(-= , boost::proto::tag::minus_assign)
BOOST_LAMBDA_DEFINE_ASSIGN_OP(&= , boost::proto::tag::bitwise_and_assign)
BOOST_LAMBDA_DEFINE_ASSIGN_OP(|= , boost::proto::tag::bitwise_or_assign)
BOOST_LAMBDA_DEFINE_ASSIGN_OP(^= , boost::proto::tag::bitwise_xor_assign)
}
template<typename T>
struct var_type
{
typedef llexpr<typename proto::terminal<T &>::type> type;
};
template<typename T>
llexpr<typename proto::terminal<T &>::type> const
var(T &t)
{
llexpr<typename proto::terminal<T &>::type> that = {{t}};
return that;
}
template<typename T>
struct constant_type
: proto::result_of::make_expr<
proto::tag::terminal
, lldomain
, T const &
>
{};
template<typename T>
typename constant_type<T>::type const
constant(T const &t)
{
typename constant_type<T>::type that = {{t}};
return that;
}
template<typename T>
struct constant_ref_type
{
typedef llexpr<typename proto::terminal<T const &>::type> type;
};
template<typename T>
llexpr<typename proto::terminal<T const &>::type> const
constant_ref(T const &t)
{
llexpr<typename proto::terminal<T const &>::type> that = {{t}};
return that;
}
template<typename Cond>
struct while_generator
{
explicit while_generator(Cond const &c)
: cond(c)
{}
template<typename Body>
typename proto::result_of::make_expr<
tag::while_
, lldomain
, Cond const &
, Body const &
>::type const
operator[](Body const &body) const
{
return proto::make_expr<tag::while_, lldomain>(
boost::ref(this->cond)
, boost::ref(body)
);
}
private:
Cond const &cond;
};
template<typename Expr>
while_generator<Expr> while_(Expr const &expr)
{
return while_generator<Expr>(expr);
}
template<typename Expr>
struct else_generator
{
typedef typename proto::result_of::left<Expr const &>::type condition_type;
typedef typename proto::result_of::right<Expr const &>::type body1_type;
explicit else_generator(Expr const &expr)
: if_(expr)
{}
template<typename Body2>
typename proto::result_of::make_expr<
tag::if_else_
, lldomain
, condition_type
, body1_type
, Body2 const &
>::type const
operator[](Body2 const &body2) const
{
return proto::make_expr<tag::if_else_, lldomain>(
boost::ref(proto::left(this->if_))
, boost::ref(proto::right(this->if_))
, boost::ref(body2)
);
}
private:
Expr const &if_;
};
template<typename Expr>
struct with_else : Expr
{
template<typename T>
with_else(T const &expr)
: Expr(expr)
, else_(*this)
{}
else_generator<Expr> else_;
};
template<typename Cond>
struct if_generator
{
explicit if_generator(Cond const &c)
: cond(c)
{}
template<typename Body>
with_else<
typename proto::result_of::make_expr<
tag::if_
, lldomain
, Cond const &
, Body const &
>::type
> const
operator[](Body const &body) const
{
return proto::make_expr<tag::if_, lldomain>(
boost::ref(this->cond)
, boost::ref(body)
);
}
private:
Cond const &cond;
};
template<typename Expr>
if_generator<Expr> if_(Expr const &expr)
{
return if_generator<Expr>(expr);
}
template<typename Init, typename Cond, typename Oper>
struct for_generator
{
explicit for_generator(Init const &i, Cond const &c, Oper const &o)
: init(i)
, cond(c)
, oper(o)
{}
template<typename Body>
typename proto::result_of::make_expr<
tag::for_
, lldomain
, Init const &
, Cond const &
, Oper const &
, Body const &
>::type const
operator[](Body const &body) const
{
return proto::make_expr<tag::for_, lldomain>(
boost::ref(this->init)
, boost::ref(this->cond)
, boost::ref(this->oper)
, boost::ref(body)
);
}
private:
Init const &init;
Cond const &cond;
Oper const &oper;
};
template<typename Init, typename Cond, typename Oper>
for_generator<Init, Cond, Oper> for_(Init const &i, Cond const &c, Oper const &o)
{
return for_generator<Init, Cond, Oper>(i, c, o);
}
template<typename Body>
struct do_while_generator
{
explicit do_while_generator(Body const &b)
: body(b)
{}
template<typename Cond>
typename proto::result_of::make_expr<
tag::do_while_
, lldomain
, Body const &
, Cond const &
>::type const
operator()(Cond const &cond) const
{
return proto::make_expr<tag::do_while_, lldomain>(
boost::ref(this->body)
, boost::ref(cond)
);
}
private:
Body const &body;
};
template<typename Body>
struct do_body
{
explicit do_body(Body const &body)
: while_(body)
{}
do_while_generator<Body> while_;
};
struct do_generator
{
template<typename Body>
do_body<Body> operator[](Body const &body) const
{
return do_body<Body>(body);
}
};
do_generator const do_ = {};
struct noop_fun
{
typedef void result_type;
void operator()() const {}
};
typedef llexpr<proto::function<llexpr<proto::terminal<noop_fun>::type> >::type> noop_type;
noop_type const noop = {{{{{}}}}};
template<typename Init, typename Cond, typename Oper>
typename proto::result_of::make_expr<
tag::for_
, lldomain
, Init const &
, Cond const &
, Oper const &
, noop_type const &
>::type const
for_loop(Init const &init, Cond const &cond, Oper const &oper)
{
return proto::make_expr<tag::for_, lldomain>(
boost::ref(init)
, boost::ref(cond)
, boost::ref(oper)
, boost::ref(noop)
);
}
template<typename Init, typename Cond, typename Oper, typename Body>
typename proto::result_of::make_expr<
tag::for_
, lldomain
, Init const &
, Cond const &
, Oper const &
, Body const &
>::type const
for_loop(Init const &init, Cond const &cond, Oper const &oper, Body const &body)
{
return proto::make_expr<tag::for_>(
boost::ref(init)
, boost::ref(cond)
, boost::ref(oper)
, boost::ref(body)
);
}
template<typename Cond, typename Body>
typename proto::result_of::make_expr<
tag::while_
, lldomain
, Cond const &
, Body const &
>::type const
while_loop(Cond const &cond, Body const &body)
{
return proto::make_expr<tag::while_, lldomain>(
boost::ref(cond)
, boost::ref(body)
);
}
template<typename Cond>
typename proto::result_of::make_expr<
tag::while_
, lldomain
, Cond const &
, noop_type const &
>::type const
while_loop(Cond const &cond)
{
return proto::make_expr<tag::while_, lldomain>(
boost::ref(cond)
, boost::ref(noop)
);
}
template<typename Cond, typename Body>
typename proto::result_of::make_expr<
tag::do_while_
, lldomain
, Body const &
, Cond const &
>::type const
do_while_loop(Cond const &cond, Body const &body)
{
return proto::make_expr<tag::do_while_, lldomain>(
boost::ref(body)
, boost::ref(cond)
);
}
template<typename Cond>
typename proto::result_of::make_expr<
tag::do_while_
, lldomain
, noop_type const &
, Cond const &
>::type const
do_while_loop(Cond const &cond)
{
return proto::make_expr<tag::do_while_, lldomain>(
boost::ref(noop)
, boost::ref(cond)
);
}
template<typename Cond, typename Body1>
typename proto::result_of::make_expr<
tag::if_
, lldomain
, Cond const &
, Body1 const &
>::type const
if_then(Cond const &cond, Body1 const &body1)
{
return proto::make_expr<tag::if_, lldomain>(
boost::ref(cond)
, boost::ref(body1)
);
}
template<typename Cond, typename Body1, typename Body2>
typename proto::result_of::make_expr<
tag::if_else_
, lldomain
, Cond const &
, Body1 const &
, Body2 const &
>::type const
if_then_else(Cond const &cond, Body1 const &body1, Body2 const &body2)
{
return proto::make_expr<tag::if_else_, lldomain>(
boost::ref(cond)
, boost::ref(body1)
, boost::ref(body2)
);
}
template<typename Cond, typename Body1, typename Body2>
typename proto::result_of::make_expr<
proto::tag::if_else_
, lldomain
, Cond const &
, Body1 const &
, Body2 const &
>::type const
if_then_else_return(Cond const &cond, Body1 const &body1, Body2 const &body2)
{
return proto::make_expr<proto::tag::if_else_, lldomain>(
boost::ref(cond)
, boost::ref(body1)
, boost::ref(body2)
);
}
template<typename T>
T const &make_const(T const &t)
{
return t;
}
#define M1(N, typename_A, A_const_ref, A_const_ref_a, ref_a) \
template<typename_A(N)> \
typename proto::result_of::make_expr< \
proto::tag::function \
, lldomain \
, A_const_ref(N) \
>::type const \
bind(A_const_ref_a(N)) \
{ \
return proto::make_expr<proto::tag::function, lldomain>(ref_a(N)); \
} \
\
template<typename Ret, typename_A(N)> \
typename proto::result_of::make_expr< \
proto::tag::function \
, lldomain \
, A_const_ref(N) \
>::type const \
bind(A_const_ref_a(N)) \
{ \
return proto::make_expr<proto::tag::function, lldomain>(ref_a(N)); \
} \
/**/
BOOST_PROTO_REPEAT_FROM_TO(1, BOOST_PP_INC(BOOST_PROTO_MAX_ARITY), M1)
#undef M1
template<typename Ret, typename Expr>
Expr const &ret(Expr const &expr)
{
return expr;
}
template<typename Expr>
Expr const &const_parameters(Expr const &expr)
{
return expr;
}
template<typename Expr>
Expr const &break_const(Expr const &expr)
{
return expr;
}
template<typename Lambda>
proto::unexpr<Lambda> const
unlambda(Lambda const &lambda)
{
return proto::unexpr<Lambda>(lambda);
}
template<typename Lambda>
typename proto::result_of::make_expr<
tag::protect
, lldomain
, Lambda const &
>::type const
protect(Lambda const &lambda)
{
return proto::make_expr<tag::protect, lldomain>(boost::ref(lambda));
}
template<typename T>
T const std_functor(T const &t)
{
return t;
}
template<typename T>
struct ll_static_cast_fun
{
typedef T result_type;
template<typename U>
T operator()(U &u) const
{
return static_cast<T>(u);
}
template<typename U>
T operator()(U const &u) const
{
return static_cast<T>(u);
}
};
template<typename T, typename U>
typename proto::result_of::make_expr<
proto::tag::function
, lldomain
, ll_static_cast_fun<T>
, U const &
>::type
ll_static_cast(U const &u)
{
ll_static_cast_fun<T> fun;
return proto::make_expr<proto::tag::function, lldomain>(fun, boost::ref(u));
}
template<typename T>
struct ll_const_cast_fun
{
typedef T result_type;
template<typename U>
T operator()(U &u) const
{
return const_cast<T>(u);
}
template<typename U>
T operator()(U const &u) const
{
return const_cast<T>(u);
}
};
template<typename T, typename U>
typename proto::result_of::make_expr<
proto::tag::function
, lldomain
, ll_const_cast_fun<T>
, U const &
>::type
ll_const_cast(U const &u)
{
ll_const_cast_fun<T> fun;
return proto::make_expr<proto::tag::function, lldomain>(fun, boost::ref(u));
}
template<typename T>
struct ll_dynamic_cast_fun
{
typedef T result_type;
template<typename U>
T operator()(U &u) const
{
return dynamic_cast<T>(u);
}
template<typename U>
T operator()(U const &u) const
{
return dynamic_cast<T>(u);
}
};
template<typename T, typename U>
typename proto::result_of::make_expr<
proto::tag::function
, lldomain
, ll_dynamic_cast_fun<T>
, U const &
>::type
ll_dynamic_cast(U const &u)
{
ll_dynamic_cast_fun<T> fun;
return proto::make_expr<proto::tag::function, lldomain>(fun, boost::ref(u));
}
template<typename T>
struct ll_reinterpret_cast_fun
{
typedef T result_type;
template<typename U>
T operator()(U &u) const
{
return reinterpret_cast<T>(u);
}
template<typename U>
T operator()(U const &u) const
{
return reinterpret_cast<T>(u);
}
};
template<typename T, typename U>
typename proto::result_of::make_expr<
proto::tag::function
, lldomain
, ll_reinterpret_cast_fun<T>
, U const &
>::type
ll_reinterpret_cast(U const &u)
{
ll_reinterpret_cast_fun<T> fun;
return proto::make_expr<proto::tag::function, lldomain>(fun, boost::ref(u));
}
struct ll_sizeof_fun
{
typedef std::size_t result_type;
template<typename U>
std::size_t operator()(U const &) const
{
return sizeof(U);
}
};
template<typename U>
typename proto::result_of::make_expr<
proto::tag::function
, lldomain
, ll_sizeof_fun
, U const &
>::type
ll_sizeof(U const &u)
{
ll_sizeof_fun fun;
return proto::make_expr<proto::tag::function, lldomain>(fun, boost::ref(u));
}
struct ll_typeid_fun
{
typedef std::type_info const &result_type;
template<typename U>
std::type_info const &operator()(U const &) const
{
return typeid(U);
}
};
template<typename U>
typename proto::result_of::make_expr<
proto::tag::function
, lldomain
, ll_typeid_fun
, U const &
>::type
ll_typeid(U const &u)
{
ll_typeid_fun fun;
return proto::make_expr<proto::tag::function, lldomain>(fun, boost::ref(u));
}
template<typename T>
struct constructor
{
typedef T result_type;
T operator()() const
{
return T();
}
#define M0(Z, N, DATA) \
template<BOOST_PP_ENUM_PARAMS_Z(Z, N, typename A)> \
T operator()(BOOST_PP_ENUM_BINARY_PARAMS_Z(Z, N, A, const &a)) const \
{ \
return T(BOOST_PP_ENUM_PARAMS_Z(Z, N, a)); \
} \
/**/
BOOST_PP_REPEAT_FROM_TO(1, BOOST_PROTO_MAX_ARITY, M0, ~)
#undef M0
};
template<typename T>
struct new_ptr
{
typedef T *result_type;
T *operator()() const
{
return new T();
}
#define M0(Z, N, DATA) \
template<BOOST_PP_ENUM_PARAMS_Z(Z, N, typename A)> \
T *operator()(BOOST_PP_ENUM_BINARY_PARAMS_Z(Z, N, A, const &a)) const \
{ \
return new T(BOOST_PP_ENUM_PARAMS_Z(Z, N, a)); \
} \
/**/
BOOST_PP_REPEAT_FROM_TO(1, BOOST_PROTO_MAX_ARITY, M0, ~)
#undef M0
};
struct destructor
{
typedef void result_type;
template<typename T>
void operator()(T const &t) const
{
t.~T();
}
template<typename T>
void operator()(T *const &t) const
{
(*t).~T();
}
};
struct delete_ptr
{
typedef void result_type;
template<typename T>
void operator()(T *t) const
{
delete t;
}
};
template<typename T>
struct new_array
{
typedef T *result_type;
T *operator()(std::size_t n) const
{
return new T[n];
}
};
struct delete_array
{
typedef void result_type;
template<typename T>
void operator()(T *t) const
{
delete[] t;
}
};
template<typename T>
struct type2type {};
struct try_catch_nil {};
template<typename Head, typename Tail>
struct try_catch_cons : Tail
{
typedef typename Head::proto_tag::exception_type exception_type;
try_catch_cons(Head const &head, Tail const &tail)
: Tail(tail)
, head(head)
{}
template<typename State, typename Data>
typename result_of<Tail const(State const &, Data &)>::type
operator()(State const &state, Data &data) const
{
return this->invoke(state, data, type2type<exception_type>());
}
private:
// catch(Exception const &)
template<typename State, typename Data, typename Exception>
typename result_of<Tail const(State const &, Data &)>::type
invoke(State const &state, Data &data, type2type<Exception>) const
{
typedef typename result_of<Tail const(State const &, Data &)>::type result_type;
try
{
return static_cast<result_type>(this->Tail::operator()(state, data));
}
catch(Exception const &e)
{
return static_cast<result_type>(Eval()(this->head, e, data));
}
}
// catch(...)
template<typename State, typename Data>
typename result_of<Tail const(State const &, Data &)>::type
invoke(State const &state, Data &data, type2type<tag::catch_all_>) const
{
typedef typename result_of<Tail const(State const &, Data &)>::type result_type;
try
{
return static_cast<result_type>(this->Tail::operator()(state, data));
}
catch(...)
{
return static_cast<result_type>(Eval()(this->head, tag::catch_all_(), data));
}
}
Head const &head;
};
template<typename Head>
struct try_catch_cons<Head, try_catch_nil> : proto::callable
{
try_catch_cons(Head const &head, try_catch_nil const &)
: head(head)
{}
template<typename Sig>
struct result;
template<typename This, typename State, typename Data>
struct result<This(State, Data)>
: result_of<Eval(Head const &, State, Data)>
{};
template<typename State, typename Data>
typename result_of<Eval(Head const &, State, Data)>::type
operator()(State const &state, Data &data) const
{
return Eval()(this->head, state, data);
}
private:
Head const &head;
};
struct try_catch_fun : proto::callable
{
template<typename Sig>
struct result;
template<typename This, typename Fun, typename State, typename Data>
struct result<This(Fun, State, Data)>
: result_of<Fun(State, Data)>
{};
template<typename Fun, typename State, typename Data>
typename result_of<Fun(State const &, Data &)>::type
operator()(Fun const &fun, State const &state, Data &data) const
{
return fun(state, data);
}
};
template<>
struct Cases::case_<tag::try_>
: proto::otherwise<
try_catch_fun(
proto::fold<
proto::_
, try_catch_nil()
, try_catch_cons<proto::_, proto::_state>(proto::_, proto::_state)
>
, proto::_state
, proto::_data
)
>
{};
template<typename E, typename Expr>
typename proto::result_of::make_expr<tag::catch_<E>, lldomain, Expr const &>::type const
catch_exception(Expr const &expr)
{
return proto::make_expr<tag::catch_<E>, lldomain>(boost::ref(expr));
}
template<typename E>
typename proto::result_of::make_expr<tag::catch_<E>, lldomain, noop_type const &>::type const
catch_exception()
{
return proto::make_expr<tag::catch_<E>, lldomain>(boost::ref(noop));
}
template<typename Expr>
typename proto::result_of::make_expr<
tag::catch_all_
, lldomain
, Expr const &
>::type const
catch_all(Expr const &expr)
{
return proto::make_expr<tag::catch_all_, lldomain>(boost::ref(expr));
}
inline
proto::result_of::make_expr<tag::catch_all_, lldomain, noop_type const &>::type const
catch_all()
{
return proto::make_expr<tag::catch_all_, lldomain>(boost::ref(noop));
}
#define M1(N, typename_A, A_const_ref, A_const_ref_a, ref_a) \
template<typename_A(N)> \
typename proto::result_of::make_expr< \
tag::try_ \
, lldomain \
, A_const_ref(N) \
>::type const \
try_catch(A_const_ref_a(N)) \
{ \
return proto::make_expr<tag::try_, lldomain>(ref_a(N)); \
} \
/**/
BOOST_PROTO_REPEAT_FROM_TO(2, BOOST_PP_INC(BOOST_PROTO_MAX_ARITY), M1)
#undef M1
template<typename Expr>
typename proto::result_of::make_expr<
proto::tag::function
, lldomain
, throw_fun
, Expr const &
>::type const
throw_exception(Expr const &expr)
{
throw_fun fun;
return proto::make_expr<proto::tag::function, lldomain>(fun, boost::ref(expr));
}
inline
proto::result_of::make_expr<proto::tag::function, lldomain, rethrow_fun>::type const
rethrow()
{
return proto::make_expr<proto::tag::function, lldomain>(rethrow_fun());
}
struct make_void_fun
{
typedef void result_type;
template<typename T>
void operator()(T const &) const
{}
};
template<typename Expr>
typename proto::result_of::make_expr<
proto::tag::function
, lldomain
, make_void_fun
, Expr const &
>::type const
make_void(Expr const &expr)
{
make_void_fun fun;
return proto::make_expr<proto::tag::function, lldomain>(fun, boost::ref(expr));
}
#define M1(N, typename_A, A_const_ref, A_const_ref_a, ref_a) \
template<typename_A(N)> \
typename proto::result_of::make_expr< \
tag::switch_ \
, lldomain \
, A_const_ref(N) \
>::type const \
switch_statement(A_const_ref_a(N)) \
{ \
return proto::make_expr<tag::switch_, lldomain>(ref_a(N)); \
} \
/**/
BOOST_PROTO_REPEAT_FROM_TO(2, BOOST_PP_INC(BOOST_PROTO_MAX_ARITY), M1)
#undef M1
template<int I, typename Expr>
typename proto::result_of::make_expr<tag::case_<I>, lldomain, Expr const &>::type const
case_statement(Expr const &expr)
{
return proto::make_expr<tag::case_<I>, lldomain>(boost::ref(expr));
}
template<int I>
typename proto::result_of::make_expr<tag::case_<I>, lldomain, noop_type const &>::type const
case_statement()
{
return proto::make_expr<tag::case_<I>, lldomain>(boost::ref(noop));
}
template<typename Expr>
typename proto::result_of::make_expr<tag::default_, lldomain, Expr const &>::type const
default_statement(Expr const &expr)
{
return proto::make_expr<tag::default_, lldomain>(boost::ref(expr));
}
inline
proto::result_of::make_expr<tag::default_, lldomain, noop_type const &>::type const
default_statement()
{
return proto::make_expr<tag::default_, lldomain>(boost::ref(noop));
}
namespace ll
{
struct for_each
{
template<typename Sig>
struct result;
template<typename This, typename Begin, typename End, typename Fun>
struct result<This(Begin, End, Fun)>
: remove_const<typename remove_reference<Fun>::type>
{};
template<typename InIter, typename Fun>
Fun operator()(InIter begin, InIter end, Fun fun) const
{
return std::for_each(begin, end, fun);
}
};
}
}}
namespace boost
{
template<typename Expr>
struct result_of<lambda::llexpr<Expr>()>
: lambda::llexpr<Expr>::template result<lambda::llexpr<Expr>()>
{};
template<typename Expr>
struct result_of<lambda::llexpr<Expr> const()>
: lambda::llexpr<Expr>::template result<lambda::llexpr<Expr> const()>
{};
}
#ifdef _MSC_VER
# pragma warning(pop)
#endif
#endif
#else
BOOST_PP_SEQ_FOR_EACH_PRODUCT(
M2,
BOOST_PP_REPEAT(BOOST_PP_ITERATION(), M1, ~)
)
#endif
