Struct Initial

Creates a type that is mostly T, only with a different initial value of val.


						
				struct Initial(T, T val)
				;

It differs from https://dlang.org/library/std/typecons/typedef.html in that typedef takes care to create a new type that does not implicitly convert to the base type, whereas we try to stay compatible with the base type.

Constructors

Name	Description
`this`

Fields

Name	Type	Description
`_payload`	`T`

Methods

Name	Description
`toString`

Templates

Name	Description
`from`

Example

alias int1 = Initial!(int, 1);
static assert(int1.init == 1); // typeof(int1.init) == int1
static assert(int1.sizeof == int.sizeof);

int1 i;
assert(i == 1);
int1 ii = 2;
assert(ii == 2);
assert(ii.init == 1);
assert(int1.init == 1);

void f(int val)
{
    assert(val == 1);
}
f(i);

int i0;
assert(i0 == 0);
i = i0;
assert(i == 0);
assert(i.init == 1);
i0 = ii;
assert(i0 == 2);
assert(i0.init == 0);

import std.string;
assert(format("%6d", ii) == "     2");