Util

Functions
template<typename F >
impl::memoizer< F >	rangeless::fn::make_memoized (F fn)
	Memoizing wrapper for non-recursive non-mutable unary lambdas (not synchronized). More...
template<typename F >
impl::scope_guard< F >	rangeless::fn::make_scope_guard (F fn)
	Basic scope guard - execute some code in guard`s destructor. More...

Detailed Description

Function Documentation

make_memoized()

template<typename F >

impl::memoizer<F> rangeless::fn::make_memoized

(

F

fn

)

Memoizing wrapper for non-recursive non-mutable unary lambdas (not synchronized).

size_t exec_count = 0;
auto fn = make_memoized([&](int x){ exec_count++; return x*2; });

VERIFY(fn(1) == 2);
VERIFY(fn(2) == 4);
VERIFY(fn(1) == 2);
VERIFY(exec_count == 2);

Definition at line 4492 of file fn.hpp.

make_scope_guard()

template<typename F >

impl::scope_guard<F> rangeless::fn::make_scope_guard

(

F

fn

)

Basic scope guard - execute some code in guard`s destructor.

{{
    // ...

    auto on_exit = fn::make_scope_guard([&]
    {
        std::cerr << "Executing clean-up or roll-back...\n";
    });

    on_exit.dismiss(); // Cancel if no longer applicable.
}}

Definition at line 4514 of file fn.hpp.