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// Boost Lambda Library - operator_lambda_func_base.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_OPERATOR_LAMBDA_FUNC_BASE_HPP
#define BOOST_LAMBDA_OPERATOR_LAMBDA_FUNC_BASE_HPP
namespace boost {
namespace lambda {
// These operators cannot be implemented as apply functions of action
// templates
// Specialization for comma.
template<class Args>
class lambda_functor_base<other_action<comma_action>, Args> {
public:
Args args;
public:
explicit lambda_functor_base(const Args& a) : args(a) {}
template<class RET, CALL_TEMPLATE_ARGS>
RET call(CALL_FORMAL_ARGS) const {
return detail::select(boost::tuples::get<0>(args), CALL_ACTUAL_ARGS),
detail::select(boost::tuples::get<1>(args), CALL_ACTUAL_ARGS);
}
template<class SigArgs> struct sig {
private:
typedef typename
detail::deduce_argument_types<Args, SigArgs>::type rets_t;
public:
typedef typename return_type_2_comma< // comma needs special handling
typename detail::element_or_null<0, rets_t>::type,
typename detail::element_or_null<1, rets_t>::type
>::type type;
};
};
namespace detail {
// helper traits to make the expression shorter, takes binary action
// bound argument tuple, open argument tuple and gives the return type
template<class Action, class Bound, class Open> class binary_rt {
private:
typedef typename
detail::deduce_argument_types<Bound, Open>::type rets_t;
public:
typedef typename return_type_2_prot<
Action,
typename detail::element_or_null<0, rets_t>::type,
typename detail::element_or_null<1, rets_t>::type
>::type type;
};
// same for unary actions
template<class Action, class Bound, class Open> class unary_rt {
private:
typedef typename
detail::deduce_argument_types<Bound, Open>::type rets_t;
public:
typedef typename return_type_1_prot<
Action,
typename detail::element_or_null<0, rets_t>::type
>::type type;
};
} // end detail
// Specialization for logical and (to preserve shortcircuiting)
// this could be done with a macro as the others, code used to be different
template<class Args>
class lambda_functor_base<logical_action<and_action>, Args> {
public:
Args args;
public:
explicit lambda_functor_base(const Args& a) : args(a) {}
template<class RET, CALL_TEMPLATE_ARGS>
RET call(CALL_FORMAL_ARGS) const {
return detail::select(boost::tuples::get<0>(args), CALL_ACTUAL_ARGS) &&
detail::select(boost::tuples::get<1>(args), CALL_ACTUAL_ARGS);
}
template<class SigArgs> struct sig {
typedef typename
detail::binary_rt<logical_action<and_action>, Args, SigArgs>::type type;
};
};
// Specialization for logical or (to preserve shortcircuiting)
// this could be done with a macro as the others, code used to be different
template<class Args>
class lambda_functor_base<logical_action< or_action>, Args> {
public:
Args args;
public:
explicit lambda_functor_base(const Args& a) : args(a) {}
template<class RET, CALL_TEMPLATE_ARGS>
RET call(CALL_FORMAL_ARGS) const {
return detail::select(boost::tuples::get<0>(args), CALL_ACTUAL_ARGS) ||
detail::select(boost::tuples::get<1>(args), CALL_ACTUAL_ARGS);
}
template<class SigArgs> struct sig {
typedef typename
detail::binary_rt<logical_action<or_action>, Args, SigArgs>::type type;
};
};
// Specialization for subscript
template<class Args>
class lambda_functor_base<other_action<subscript_action>, Args> {
public:
Args args;
public:
explicit lambda_functor_base(const Args& a) : args(a) {}
template<class RET, CALL_TEMPLATE_ARGS>
RET call(CALL_FORMAL_ARGS) const {
return detail::select(boost::tuples::get<0>(args), CALL_ACTUAL_ARGS)
[detail::select(boost::tuples::get<1>(args), CALL_ACTUAL_ARGS)];
}
template<class SigArgs> struct sig {
typedef typename
detail::binary_rt<other_action<subscript_action>, Args, SigArgs>::type
type;
};
};
#define BOOST_LAMBDA_BINARY_ACTION(SYMBOL, ACTION_CLASS) \
template<class Args> \
class lambda_functor_base<ACTION_CLASS, Args> { \
public: \
Args args; \
public: \
explicit lambda_functor_base(const Args& a) : args(a) {} \
\
template<class RET, CALL_TEMPLATE_ARGS> \
RET call(CALL_FORMAL_ARGS) const { \
return detail::select(boost::tuples::get<0>(args), CALL_ACTUAL_ARGS) \
SYMBOL \
detail::select(boost::tuples::get<1>(args), CALL_ACTUAL_ARGS); \
} \
template<class SigArgs> struct sig { \
typedef typename \
detail::binary_rt<ACTION_CLASS, Args, SigArgs>::type type; \
}; \
};
#define BOOST_LAMBDA_PREFIX_UNARY_ACTION(SYMBOL, ACTION_CLASS) \
template<class Args> \
class lambda_functor_base<ACTION_CLASS, Args> { \
public: \
Args args; \
public: \
explicit lambda_functor_base(const Args& a) : args(a) {} \
\
template<class RET, CALL_TEMPLATE_ARGS> \
RET call(CALL_FORMAL_ARGS) const { \
return SYMBOL \
detail::select(boost::tuples::get<0>(args), CALL_ACTUAL_ARGS); \
} \
template<class SigArgs> struct sig { \
typedef typename \
detail::unary_rt<ACTION_CLASS, Args, SigArgs>::type type; \
}; \
};
#define BOOST_LAMBDA_POSTFIX_UNARY_ACTION(SYMBOL, ACTION_CLASS) \
template<class Args> \
class lambda_functor_base<ACTION_CLASS, Args> { \
public: \
Args args; \
public: \
explicit lambda_functor_base(const Args& a) : args(a) {} \
\
template<class RET, CALL_TEMPLATE_ARGS> \
RET call(CALL_FORMAL_ARGS) const { \
return \
detail::select(boost::tuples::get<0>(args), CALL_ACTUAL_ARGS) SYMBOL; \
} \
template<class SigArgs> struct sig { \
typedef typename \
detail::unary_rt<ACTION_CLASS, Args, SigArgs>::type type; \
}; \
};
BOOST_LAMBDA_BINARY_ACTION(+,arithmetic_action<plus_action>)
BOOST_LAMBDA_BINARY_ACTION(-,arithmetic_action<minus_action>)
BOOST_LAMBDA_BINARY_ACTION(*,arithmetic_action<multiply_action>)
BOOST_LAMBDA_BINARY_ACTION(/,arithmetic_action<divide_action>)
BOOST_LAMBDA_BINARY_ACTION(%,arithmetic_action<remainder_action>)
BOOST_LAMBDA_BINARY_ACTION(<<,bitwise_action<leftshift_action>)
BOOST_LAMBDA_BINARY_ACTION(>>,bitwise_action<rightshift_action>)
BOOST_LAMBDA_BINARY_ACTION(&,bitwise_action<and_action>)
BOOST_LAMBDA_BINARY_ACTION(|,bitwise_action<or_action>)
BOOST_LAMBDA_BINARY_ACTION(^,bitwise_action<xor_action>)
BOOST_LAMBDA_BINARY_ACTION(<,relational_action<less_action>)
BOOST_LAMBDA_BINARY_ACTION(>,relational_action<greater_action>)
BOOST_LAMBDA_BINARY_ACTION(<=,relational_action<lessorequal_action>)
BOOST_LAMBDA_BINARY_ACTION(>=,relational_action<greaterorequal_action>)
BOOST_LAMBDA_BINARY_ACTION(==,relational_action<equal_action>)
BOOST_LAMBDA_BINARY_ACTION(!=,relational_action<notequal_action>)
BOOST_LAMBDA_BINARY_ACTION(+=,arithmetic_assignment_action<plus_action>)
BOOST_LAMBDA_BINARY_ACTION(-=,arithmetic_assignment_action<minus_action>)
BOOST_LAMBDA_BINARY_ACTION(*=,arithmetic_assignment_action<multiply_action>)
BOOST_LAMBDA_BINARY_ACTION(/=,arithmetic_assignment_action<divide_action>)
BOOST_LAMBDA_BINARY_ACTION(%=,arithmetic_assignment_action<remainder_action>)
BOOST_LAMBDA_BINARY_ACTION(<<=,bitwise_assignment_action<leftshift_action>)
BOOST_LAMBDA_BINARY_ACTION(>>=,bitwise_assignment_action<rightshift_action>)
BOOST_LAMBDA_BINARY_ACTION(&=,bitwise_assignment_action<and_action>)
BOOST_LAMBDA_BINARY_ACTION(|=,bitwise_assignment_action<or_action>)
BOOST_LAMBDA_BINARY_ACTION(^=,bitwise_assignment_action<xor_action>)
BOOST_LAMBDA_BINARY_ACTION(=,other_action< assignment_action>)
BOOST_LAMBDA_PREFIX_UNARY_ACTION(+, unary_arithmetic_action<plus_action>)
BOOST_LAMBDA_PREFIX_UNARY_ACTION(-, unary_arithmetic_action<minus_action>)
BOOST_LAMBDA_PREFIX_UNARY_ACTION(~, bitwise_action<not_action>)
BOOST_LAMBDA_PREFIX_UNARY_ACTION(!, logical_action<not_action>)
BOOST_LAMBDA_PREFIX_UNARY_ACTION(++, pre_increment_decrement_action<increment_action>)
BOOST_LAMBDA_PREFIX_UNARY_ACTION(--, pre_increment_decrement_action<decrement_action>)
BOOST_LAMBDA_PREFIX_UNARY_ACTION(&,other_action<addressof_action>)
BOOST_LAMBDA_PREFIX_UNARY_ACTION(*,other_action<contentsof_action>)
BOOST_LAMBDA_POSTFIX_UNARY_ACTION(++, post_increment_decrement_action<increment_action>)
BOOST_LAMBDA_POSTFIX_UNARY_ACTION(--, post_increment_decrement_action<decrement_action>)
#undef BOOST_LAMBDA_POSTFIX_UNARY_ACTION
#undef BOOST_LAMBDA_PREFIX_UNARY_ACTION
#undef BOOST_LAMBDA_BINARY_ACTION
} // namespace lambda
} // namespace boost
#endif
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