FunctionResult< SIG > Class Template Reference

#include "lib/wrapper.hpp"

Description

template<typename SIG>
class lib::wrapper::FunctionResult< SIG >

Extension of ItemWrapper: a function remembering the result of the last invocation.

Initially, the "value" is bottom (undefined, NIL), until the function is invoked for the first time. After that, the result of the last invocation can be accessed by operator* ()

Note

non-copyable. (removing this limitation would require a much more expensive implementation, by implementing operator() ourselves)

Definition at line 410 of file wrapper.hpp.

Public Member Functions
	FunctionResult ()
	default ctor yields an object locked to invalid state
template<typename FUN >
	FunctionResult (FUN targetFunction)
	Create result-remembering functor by binding the given function. More...
bool	isValid () const
	operator bool () const
Res &	operator* () const

Private Types
using	Res = typename _Fun< SIG >::Ret
using	ResWrapper = ItemWrapper< Res >

Private Member Functions
Res	captureResult (Res res)
Private Member Functions inherited from NonCopyable
	NonCopyable (NonCopyable const &)=delete
NonCopyable &	operator= (NonCopyable const &)=delete

Private Attributes
ResWrapper	lastResult_

Constructor & Destructor Documentation

FunctionResult()

FunctionResult ( FUN  targetFunction )

inline

Create result-remembering functor by binding the given function.

Explanation:

• *this is a function
• initially it is defined as invalid
• then we build the function composition of the target function, and a function storing the result value into the ResWrapper member
• define ourselves by assigning the resulting composite function

Definition at line 443 of file wrapper.hpp.

Inheritance diagram for FunctionResult< SIG >:

Collaboration diagram for FunctionResult< SIG >:

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The documentation for this class was generated from the following file:

• wrapper.hpp