Evaluation of lazy objects

Detailed Description

A generic nda::clef::eval function which forwards the evaluation to specialized evaluators.

Classes
struct	nda::clef::evaluator< T, Pairs >
	Generic evaluator for types which do not have a specialized evaluator. More...
struct	nda::clef::evaluator< expr< Tag, Childs... >, Pairs... >
	Specialization of nda::clef::evaluator for nda::clef::expr types. More...
struct	nda::clef::evaluator< make_fun_impl< T, Is... >, Pairs... >
	Specialization of nda::clef::evaluator for nda::clef::make_fun_impl types. More...
struct	nda::clef::evaluator< placeholder< N >, pair< Is, Ts >... >
	Specialization of nda::clef::evaluator for nda::clef::placeholder types. More...
struct	nda::clef::evaluator< std::reference_wrapper< T >, Pairs... >
	Specialization of nda::clef::evaluator for std::reference_wrapper types. More...

Functions
template<typename T, typename... Pairs>
__inline__ decltype(auto)	nda::clef::eval (T const &obj, Pairs &&...pairs)
	Generic function to evaluate expressions and other types.

Function Documentation

eval()

template<typename T, typename... Pairs>

__inline__ decltype(auto) nda::clef::eval	(	T const &	obj,
		Pairs &&...	pairs )

#include <nda/clef/eval.hpp>

Generic function to evaluate expressions and other types.

Calls the correct nda::clef::evaluator for the given expression/type.

nda::clef::placeholder<0> i_;
nda::clef::placeholder<1> j_;
auto ex = i_ + j_;
auto res = nda::clef::eval(ex, i_ = 1, j_ = 2); // int res = 3;

Here, ex is a binary expression with the + tag and the placeholder i_ and j_ as its child nodes. The eval function calls the correct evaluator for the given expression and the given pairs.

Template Parameters

T	Type of the expression/object.
Pairs	Types of the nda::clef::pair objects.

Parameters

obj	Expression/object to be evaluated.
pairs	nda::clef::pair objects to be applied to the expression.

Returns

The result of the evaluation depending on the type of the expression/object.

Definition at line 197 of file eval.hpp.