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support for currying

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[SVN r12135]
This commit is contained in:
Jaakko Järvi
2001-12-21 19:22:59 +00:00
parent aa715e88d4
commit d52a33ac2a
1 changed files with 11 additions and 6 deletions
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17
include/boost/lambda/detail/actions.hpp
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@@ -42,7 +42,11 @@ template <class RET> class explicit_return_type_action {};
// action for preventing the expansion of a lambda expression
struct protect_action {};
// action for curried functions, I stands for the number of curried arguments
// (can be 1 or 2)
template <int I> class curry_action {};
template <class Action> class return_void_action;
namespace detail {
@@ -57,11 +61,6 @@ namespace detail {
// This argument is only relevant in the return type deduction code
template <int I, class Result_type = detail::unspecified> class function_action {};
// lambda_functor_action arise when the target function in a bind expression
// is a lambda functor. We must use a separate action type to notify
// the return type deduction system, but the apply functions of
// function_action struct work just fine
template <int I> class lambda_functor_action : public function_action<I> {};
@@ -84,12 +83,18 @@ public:
}
};
template <class T> struct is_lambda_functor;
template<class T> class function_action<3, T> {
public:
template<class RET, class A1, class A2, class A3>
static RET apply(A1& a1, A2& a2, A3& a3) {
return function_adaptor<typename boost::remove_const<A1>::type>::template apply<RET>
(a1, a2, a3);
}
};