Library Reference

version 2.112.0

Internal API

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core.internal.array.utils

This module contains utility functions to help the implementation of the runtime hook

License:

Distributed under theBoost Software License 1.0. (See accompanying file LICENSE)

Sourcecore/internal/array/utils.d

enum autoisNoThrow(alias F);

Check if the functionF is calleable in anothrow scope.

Parameters:

F	Function that does not take any parameters

Returns:

if the function is callable in anothrow scope.

templateisPostblitNoThrow(T)

Check if the typeT's postblit is called in nothrow, if it exist

Parameters:

T	Type to check

Returns:

if the postblit is callable in anothrow scope, if it exist. if it does not exist, return true.

@trusted void[]__arrayAlloc(T)(size_tarrSize);

Allocate a memory block with appendable capabilities for array usage.

Parameters:

size_tarrSize size of the allocated array in bytes

Returns:

void[] matching requested size on success,null on failure.

pure nothrow size_tnewCapacity(size_tnewlength, size_telemsize);

Given an array of lengthsize that needs to be expanded tonewlength,compute a new capacity.

Better version by Dave Fladebo, enhanced by Steven Schveighoffer:This uses an inverse logorithmic algorithm to pre-allocate a bit morespace for larger arrays.

The maximum "extra" space is about 80% of the requested space. This is for

PAGE size and smaller.

As the arrays grow, the relative pre-allocated space shrinks.
Perhaps most importantly, overall memory usage and stress on the GC

is decreased significantly for demanding environments.

The algorithm is tuned to avoid any division at runtime.

Parameters:

size_t`newlength`	new.length
size_t`elemsize`	size of the element in the new array

Returns:

new capacity for array

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Library Reference

core.internal.array.utils