| // 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 "ndnboost/lambda/detail/is_instance_of.hpp" |
| |
| namespace ndnboost { |
| 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 |
| |
| #ifdef BOOST_NO_TEMPLATED_STREAMS |
| template<class T> struct convert_ostream_to_ref_others_to_c_plain_by_default { |
| typedef typename detail::IF< |
| ndnboost::is_convertible<T*, std::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< |
| ndnboost::is_convertible<T*, std::istream*>::value, |
| T&, |
| typename const_copy_argument <T>::type |
| >::RET type; |
| }; |
| #else |
| |
| 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; |
| }; |
| #endif |
| |
| } // 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 ndnboost |
| |
| #endif |