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Function std.experimental.allocator.expandArray
Grows array
by appending delta
more elements. The needed memory is
allocated using alloc
. The extra elements added are either default-
initialized, filled with copies of init
, or initialized with values
fetched from range
.
bool expandArray(T, Allocator)
(
auto ref Allocator alloc,
ref T[] array,
size_t delta
);
bool expandArray(T, Allocator)
(
auto ref Allocator alloc,
ref T[] array,
size_t delta,
auto ref T init
);
bool expandArray(T, Allocator, R)
(
auto ref Allocator alloc,
ref T[] array,
R range
)
if (isInputRange!R);
Parameters
Name | Description |
---|---|
T | element type of the array being created |
alloc | the allocator used for getting memory |
array | a reference to the array being grown |
delta | number of elements to add (upon success the new length of array is
array ) |
init | element used for filling the array |
range | range used for initializing the array elements |
Returns
true
upon success, false
if memory could not be allocated. In the
latter case array
is left unaffected.
Throws
The first two overloads throw only if alloc
's primitives do. The
overloads that involve copy initialization deallocate memory and propagate the
exception if the copy operation throws.
Example
auto arr = theAllocator .makeArray!int([1, 2, 3]);
assert(theAllocator .expandArray(arr, 2));
writeln(arr); // [1, 2, 3, 0, 0]
import std .range : only;
assert(theAllocator .expandArray(arr, only(4, 5)));
writeln(arr); // [1, 2, 3, 0, 0, 4, 5]
Authors
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.