Auto and empty array

[Daniel Kozak via Digitalmars-d]

V Mon, 30 Jun 2014 05:39:36 +0000
Igor via Digitalmars-d <digitalmars-d at puremagic.com> napsáno:

> In case I want to create a new array with size I know, it's very 
> convenient to use auto:
> auto a = new int[](13);
> But if I want to create a new, empty array? Then using auto is 
> not convenient and I have:
> auto a = new int[](0);
> It seems a bit bloated, compared to int[] a = []. I like using 
> auto because of uniform syntax and other reasons. Is there any 
> concise way to create a new empty array with auto?

You can write some helper function:

import std.stdio;

auto newa(T)(size_t length = 0)
{
    return new T[length];
}

void main(string[] args)
{
    auto a = newa!(int)(13);
    auto b = newa!(int);
    writeln(typeid(a),":", a.length);
    writeln(typeid(b),":", b.length);
    stdin.readln;
}