Re: [OT] Re: @gc attribute for bypassign @nogc

[jdfgjdf via Digitalmars-d]

On Thursday, 28 July 2016 at 17:54:20 UTC, jdfgjdf wrote:
On Sunday, 24 July 2016 at 22:13:02 UTC, bitwise wrote:
...

I like the  typo in the title. Let's make a game:

"write the `bypassign` function, its ddoc, and its unittests"

:)

Entry one:

/**
 * Bypassign is a struct wrapper that bypasses the original 
type's `opAssign()`,
 * thus any assignation to the wrapped type is a noop.
 */
struct Bypassign(T)
if (is(T == struct))
{
    private T _bypassigned;
    alias _bypassigned this;
    void opAssign(T)(auto ref T t)
    {/*bypassignation*/}
}
///
unittest
{
    static struct Foo
    {
        int i;
        alias i this;
    }
    Bypassign!Foo bpaFoo;
    bpaFoo = 1;
    assert(bpaFoo == 0);
}