353 lines
17 KiB
Plaintext
353 lines
17 KiB
Plaintext
|
// Boost Lambda Library - operators.hpp --------------------------------------
|
||
|
|
|
||
|
|
// Copyright (C) 1999, 2000 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
|
||
|
|
//
|
||
|
|
// 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)
|
||
|
|
//
|
||
|
|
// For more information, see www.boost.org
|
||
|
|
|
||
|
|
// ---------------------------------------------------------------
|
||
|
|
|
||
|
|
#ifndef BOOST_LAMBDA_OPERATORS_HPP
|
||
|
|
#define BOOST_LAMBDA_OPERATORS_HPP
|
||
|
|
|
||
|
|
#include "boost/lambda/detail/is_instance_of.hpp"
|
||
|
|
|
||
|
|
namespace boost {
|
||
|
|
namespace lambda {
|
||
|
|
|
||
|
|
#if defined BOOST_LAMBDA_BE1
|
||
|
|
#error "Multiple defines of BOOST_LAMBDA_BE1"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// For all BOOSTA_LAMBDA_BE* macros:
|
||
|
|
|
||
|
|
// CONSTA must be either 'A' or 'const A'
|
||
|
|
// CONSTB must be either 'B' or 'const B'
|
||
|
|
|
||
|
|
// It is stupid to have the names A and B as macro arguments, but it avoids
|
||
|
|
// the need to pass in emtpy macro arguments, which gives warnings on some
|
||
|
|
// compilers
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_BE1(OPER_NAME, ACTION, CONSTA, CONSTB, CONVERSION) \
|
||
|
|
template<class Arg, class B> \
|
||
|
|
inline const \
|
||
|
|
lambda_functor< \
|
||
|
|
lambda_functor_base< \
|
||
|
|
ACTION, \
|
||
|
|
tuple<lambda_functor<Arg>, typename const_copy_argument <CONSTB>::type> \
|
||
|
|
> \
|
||
|
|
> \
|
||
|
|
OPER_NAME (const lambda_functor<Arg>& a, CONSTB& b) { \
|
||
|
|
return \
|
||
|
|
lambda_functor_base< \
|
||
|
|
ACTION, \
|
||
|
|
tuple<lambda_functor<Arg>, typename const_copy_argument <CONSTB>::type>\
|
||
|
|
> \
|
||
|
|
(tuple<lambda_functor<Arg>, typename const_copy_argument <CONSTB>::type>(a, b)); \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#if defined BOOST_LAMBDA_BE2
|
||
|
|
#error "Multiple defines of BOOST_LAMBDA_BE2"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_BE2(OPER_NAME, ACTION, CONSTA, CONSTB, CONVERSION) \
|
||
|
|
template<class A, class Arg> \
|
||
|
|
inline const \
|
||
|
|
lambda_functor< \
|
||
|
|
lambda_functor_base< \
|
||
|
|
ACTION, \
|
||
|
|
tuple<typename CONVERSION <CONSTA>::type, lambda_functor<Arg> > \
|
||
|
|
> \
|
||
|
|
> \
|
||
|
|
OPER_NAME (CONSTA& a, const lambda_functor<Arg>& b) { \
|
||
|
|
return \
|
||
|
|
lambda_functor_base< \
|
||
|
|
ACTION, \
|
||
|
|
tuple<typename CONVERSION <CONSTA>::type, lambda_functor<Arg> > \
|
||
|
|
> \
|
||
|
|
(tuple<typename CONVERSION <CONSTA>::type, lambda_functor<Arg> >(a, b)); \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#if defined BOOST_LAMBDA_BE3
|
||
|
|
#error "Multiple defines of BOOST_LAMBDA_BE3"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_BE3(OPER_NAME, ACTION, CONSTA, CONSTB, CONVERSION) \
|
||
|
|
template<class ArgA, class ArgB> \
|
||
|
|
inline const \
|
||
|
|
lambda_functor< \
|
||
|
|
lambda_functor_base< \
|
||
|
|
ACTION, \
|
||
|
|
tuple<lambda_functor<ArgA>, lambda_functor<ArgB> > \
|
||
|
|
> \
|
||
|
|
> \
|
||
|
|
OPER_NAME (const lambda_functor<ArgA>& a, const lambda_functor<ArgB>& b) { \
|
||
|
|
return \
|
||
|
|
lambda_functor_base< \
|
||
|
|
ACTION, \
|
||
|
|
tuple<lambda_functor<ArgA>, lambda_functor<ArgB> > \
|
||
|
|
> \
|
||
|
|
(tuple<lambda_functor<ArgA>, lambda_functor<ArgB> >(a, b)); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined BOOST_LAMBDA_BE
|
||
|
|
#error "Multiple defines of BOOST_LAMBDA_BE"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_BE(OPER_NAME, ACTION, CONSTA, CONSTB, CONST_CONVERSION) \
|
||
|
|
BOOST_LAMBDA_BE1(OPER_NAME, ACTION, CONSTA, CONSTB, CONST_CONVERSION) \
|
||
|
|
BOOST_LAMBDA_BE2(OPER_NAME, ACTION, CONSTA, CONSTB, CONST_CONVERSION) \
|
||
|
|
BOOST_LAMBDA_BE3(OPER_NAME, ACTION, CONSTA, CONSTB, CONST_CONVERSION)
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_EMPTY()
|
||
|
|
|
||
|
|
BOOST_LAMBDA_BE(operator+, arithmetic_action<plus_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator-, arithmetic_action<minus_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator*, arithmetic_action<multiply_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator/, arithmetic_action<divide_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator%, arithmetic_action<remainder_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator<<, bitwise_action<leftshift_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator>>, bitwise_action<rightshift_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator&, bitwise_action<and_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator|, bitwise_action<or_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator^, bitwise_action<xor_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator&&, logical_action<and_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator||, logical_action<or_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator<, relational_action<less_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator>, relational_action<greater_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator<=, relational_action<lessorequal_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator>=, relational_action<greaterorequal_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator==, relational_action<equal_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator!=, relational_action<notequal_action>, const A, const B, const_copy_argument)
|
||
|
|
|
||
|
|
BOOST_LAMBDA_BE(operator+=, arithmetic_assignment_action<plus_action>, A, const B, reference_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator-=, arithmetic_assignment_action<minus_action>, A, const B, reference_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator*=, arithmetic_assignment_action<multiply_action>, A, const B, reference_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator/=, arithmetic_assignment_action<divide_action>, A, const B, reference_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator%=, arithmetic_assignment_action<remainder_action>, A, const B, reference_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator<<=, bitwise_assignment_action<leftshift_action>, A, const B, reference_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator>>=, bitwise_assignment_action<rightshift_action>, A, const B, reference_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator&=, bitwise_assignment_action<and_action>, A, const B, reference_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator|=, bitwise_assignment_action<or_action>, A, const B, reference_argument)
|
||
|
|
BOOST_LAMBDA_BE(operator^=, bitwise_assignment_action<xor_action>, A, const B, reference_argument)
|
||
|
|
|
||
|
|
|
||
|
|
// A special trick for comma operator for correct preprocessing
|
||
|
|
#if defined BOOST_LAMBDA_COMMA_OPERATOR_NAME
|
||
|
|
#error "Multiple defines of BOOST_LAMBDA_COMMA_OPERATOR_NAME"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_COMMA_OPERATOR_NAME operator,
|
||
|
|
|
||
|
|
BOOST_LAMBDA_BE1(BOOST_LAMBDA_COMMA_OPERATOR_NAME, other_action<comma_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE2(BOOST_LAMBDA_COMMA_OPERATOR_NAME, other_action<comma_action>, const A, const B, const_copy_argument)
|
||
|
|
BOOST_LAMBDA_BE3(BOOST_LAMBDA_COMMA_OPERATOR_NAME, other_action<comma_action>, const A, const B, const_copy_argument)
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
namespace detail {
|
||
|
|
|
||
|
|
// special cases for ostream& << Any and istream& >> Any ---------------
|
||
|
|
// the actual stream classes may vary and thus a specialisation for,
|
||
|
|
// say ostream& does not match (the general case above is chosen).
|
||
|
|
// Therefore we specialise for non-const reference:
|
||
|
|
// if the left argument is a stream, we store the stream as reference
|
||
|
|
// if it is something else, we store a const plain by default
|
||
|
|
|
||
|
|
// Note that the overloading is const vs. non-const first argument
|
||
|
|
|
||
|
|
|
||
|
|
template<class T> struct convert_ostream_to_ref_others_to_c_plain_by_default {
|
||
|
|
typedef typename detail::IF<
|
||
|
|
is_instance_of_2<
|
||
|
|
T, std::basic_ostream
|
||
|
|
>::value,
|
||
|
|
T&,
|
||
|
|
typename const_copy_argument <T>::type
|
||
|
|
>::RET type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class T> struct convert_istream_to_ref_others_to_c_plain_by_default {
|
||
|
|
typedef typename detail::IF<
|
||
|
|
is_instance_of_2<
|
||
|
|
T, std::basic_istream
|
||
|
|
>::value,
|
||
|
|
T&,
|
||
|
|
typename const_copy_argument <T>::type
|
||
|
|
>::RET type;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // detail
|
||
|
|
|
||
|
|
BOOST_LAMBDA_BE2(operator<<, bitwise_action< leftshift_action>, A, const B, detail::convert_ostream_to_ref_others_to_c_plain_by_default)
|
||
|
|
BOOST_LAMBDA_BE2(operator>>, bitwise_action< rightshift_action>, A, const B, detail::convert_istream_to_ref_others_to_c_plain_by_default)
|
||
|
|
|
||
|
|
|
||
|
|
// special case for io_manipulators.
|
||
|
|
// function references cannot be given as arguments to lambda operator
|
||
|
|
// expressions in general. With << and >> the use of manipulators is
|
||
|
|
// so common, that specializations are provided to make them work.
|
||
|
|
|
||
|
|
template<class Arg, class Ret, class ManipArg>
|
||
|
|
inline const
|
||
|
|
lambda_functor<
|
||
|
|
lambda_functor_base<
|
||
|
|
bitwise_action<leftshift_action>,
|
||
|
|
tuple<lambda_functor<Arg>, Ret(&)(ManipArg)>
|
||
|
|
>
|
||
|
|
>
|
||
|
|
operator<<(const lambda_functor<Arg>& a, Ret(&b)(ManipArg))
|
||
|
|
{
|
||
|
|
return
|
||
|
|
lambda_functor_base<
|
||
|
|
bitwise_action<leftshift_action>,
|
||
|
|
tuple<lambda_functor<Arg>, Ret(&)(ManipArg)>
|
||
|
|
>
|
||
|
|
( tuple<lambda_functor<Arg>, Ret(&)(ManipArg)>(a, b) );
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class Arg, class Ret, class ManipArg>
|
||
|
|
inline const
|
||
|
|
lambda_functor<
|
||
|
|
lambda_functor_base<
|
||
|
|
bitwise_action<rightshift_action>,
|
||
|
|
tuple<lambda_functor<Arg>, Ret(&)(ManipArg)>
|
||
|
|
>
|
||
|
|
>
|
||
|
|
operator>>(const lambda_functor<Arg>& a, Ret(&b)(ManipArg))
|
||
|
|
{
|
||
|
|
return
|
||
|
|
lambda_functor_base<
|
||
|
|
bitwise_action<rightshift_action>,
|
||
|
|
tuple<lambda_functor<Arg>, Ret(&)(ManipArg)>
|
||
|
|
>
|
||
|
|
( tuple<lambda_functor<Arg>, Ret(&)(ManipArg)>(a, b) );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// (+ and -) take their arguments as const references.
|
||
|
|
// This has consquences with pointer artihmetic
|
||
|
|
// E.g int a[]; ... *a = 1 works but not *(a+1) = 1.
|
||
|
|
// the result of a+1 would be const
|
||
|
|
// To make the latter work too,
|
||
|
|
// non-const arrays are taken as non-const and stored as non-const as well.
|
||
|
|
#if defined BOOST_LAMBDA_PTR_ARITHMETIC_E1
|
||
|
|
#error "Multiple defines of BOOST_LAMBDA_PTR_ARITHMETIC_E1"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_PTR_ARITHMETIC_E1(OPER_NAME, ACTION, CONSTB) \
|
||
|
|
template<class Arg, int N, class B> \
|
||
|
|
inline const \
|
||
|
|
lambda_functor< \
|
||
|
|
lambda_functor_base<ACTION, tuple<lambda_functor<Arg>, CONSTB(&)[N]> > \
|
||
|
|
> \
|
||
|
|
OPER_NAME (const lambda_functor<Arg>& a, CONSTB(&b)[N]) \
|
||
|
|
{ \
|
||
|
|
return \
|
||
|
|
lambda_functor_base<ACTION, tuple<lambda_functor<Arg>, CONSTB(&)[N]> > \
|
||
|
|
(tuple<lambda_functor<Arg>, CONSTB(&)[N]>(a, b)); \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#if defined BOOST_LAMBDA_PTR_ARITHMETIC_E2
|
||
|
|
#error "Multiple defines of BOOST_LAMBDA_PTR_ARITHMETIC_E2"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_PTR_ARITHMETIC_E2(OPER_NAME, ACTION, CONSTA) \
|
||
|
|
template<int N, class A, class Arg> \
|
||
|
|
inline const \
|
||
|
|
lambda_functor< \
|
||
|
|
lambda_functor_base<ACTION, tuple<CONSTA(&)[N], lambda_functor<Arg> > > \
|
||
|
|
> \
|
||
|
|
OPER_NAME (CONSTA(&a)[N], const lambda_functor<Arg>& b) \
|
||
|
|
{ \
|
||
|
|
return \
|
||
|
|
lambda_functor_base<ACTION, tuple<CONSTA(&)[N], lambda_functor<Arg> > > \
|
||
|
|
(tuple<CONSTA(&)[N], lambda_functor<Arg> >(a, b)); \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
BOOST_LAMBDA_PTR_ARITHMETIC_E1(operator+, arithmetic_action<plus_action>, B)
|
||
|
|
BOOST_LAMBDA_PTR_ARITHMETIC_E2(operator+, arithmetic_action<plus_action>, A)
|
||
|
|
BOOST_LAMBDA_PTR_ARITHMETIC_E1(operator+, arithmetic_action<plus_action>,const B)
|
||
|
|
BOOST_LAMBDA_PTR_ARITHMETIC_E2(operator+, arithmetic_action<plus_action>,const A)
|
||
|
|
|
||
|
|
|
||
|
|
//BOOST_LAMBDA_PTR_ARITHMETIC_E1(operator-, arithmetic_action<minus_action>)
|
||
|
|
// This is not needed, since the result of ptr-ptr is an rvalue anyway
|
||
|
|
|
||
|
|
BOOST_LAMBDA_PTR_ARITHMETIC_E2(operator-, arithmetic_action<minus_action>, A)
|
||
|
|
BOOST_LAMBDA_PTR_ARITHMETIC_E2(operator-, arithmetic_action<minus_action>, const A)
|
||
|
|
|
||
|
|
|
||
|
|
#undef BOOST_LAMBDA_BE1
|
||
|
|
#undef BOOST_LAMBDA_BE2
|
||
|
|
#undef BOOST_LAMBDA_BE3
|
||
|
|
#undef BOOST_LAMBDA_BE
|
||
|
|
#undef BOOST_LAMBDA_COMMA_OPERATOR_NAME
|
||
|
|
|
||
|
|
#undef BOOST_LAMBDA_PTR_ARITHMETIC_E1
|
||
|
|
#undef BOOST_LAMBDA_PTR_ARITHMETIC_E2
|
||
|
|
|
||
|
|
|
||
|
|
// ---------------------------------------------------------------------
|
||
|
|
// unary operators -----------------------------------------------------
|
||
|
|
// ---------------------------------------------------------------------
|
||
|
|
|
||
|
|
#if defined BOOST_LAMBDA_UE
|
||
|
|
#error "Multiple defines of BOOST_LAMBDA_UE"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_UE(OPER_NAME, ACTION) \
|
||
|
|
template<class Arg> \
|
||
|
|
inline const \
|
||
|
|
lambda_functor<lambda_functor_base<ACTION, tuple<lambda_functor<Arg> > > > \
|
||
|
|
OPER_NAME (const lambda_functor<Arg>& a) \
|
||
|
|
{ \
|
||
|
|
return \
|
||
|
|
lambda_functor_base<ACTION, tuple<lambda_functor<Arg> > > \
|
||
|
|
( tuple<lambda_functor<Arg> >(a) ); \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
BOOST_LAMBDA_UE(operator+, unary_arithmetic_action<plus_action>)
|
||
|
|
BOOST_LAMBDA_UE(operator-, unary_arithmetic_action<minus_action>)
|
||
|
|
BOOST_LAMBDA_UE(operator~, bitwise_action<not_action>)
|
||
|
|
BOOST_LAMBDA_UE(operator!, logical_action<not_action>)
|
||
|
|
BOOST_LAMBDA_UE(operator++, pre_increment_decrement_action<increment_action>)
|
||
|
|
BOOST_LAMBDA_UE(operator--, pre_increment_decrement_action<decrement_action>)
|
||
|
|
BOOST_LAMBDA_UE(operator*, other_action<contentsof_action>)
|
||
|
|
BOOST_LAMBDA_UE(operator&, other_action<addressof_action>)
|
||
|
|
|
||
|
|
#if defined BOOST_LAMBDA_POSTFIX_UE
|
||
|
|
#error "Multiple defines of BOOST_LAMBDA_POSTFIX_UE"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define BOOST_LAMBDA_POSTFIX_UE(OPER_NAME, ACTION) \
|
||
|
|
template<class Arg> \
|
||
|
|
inline const \
|
||
|
|
lambda_functor<lambda_functor_base<ACTION, tuple<lambda_functor<Arg> > > > \
|
||
|
|
OPER_NAME (const lambda_functor<Arg>& a, int) \
|
||
|
|
{ \
|
||
|
|
return \
|
||
|
|
lambda_functor_base<ACTION, tuple<lambda_functor<Arg> > > \
|
||
|
|
( tuple<lambda_functor<Arg> >(a) ); \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
BOOST_LAMBDA_POSTFIX_UE(operator++, post_increment_decrement_action<increment_action>)
|
||
|
|
BOOST_LAMBDA_POSTFIX_UE(operator--, post_increment_decrement_action<decrement_action>)
|
||
|
|
|
||
|
|
#undef BOOST_LAMBDA_UE
|
||
|
|
#undef BOOST_LAMBDA_POSTFIX_UE
|
||
|
|
|
||
|
|
} // namespace lambda
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#endif
|