return val if

[Abby via Digitalmars-d-learn]

Is there a way to create a template that would do the same is glib
g_return_val_if_fail() 
(https://developer.gnome.org/glib/stable/glib-Warnings-and-Assertions.html#g-return-val-if-fail)

I was hoping something like this would work

template returnValIfFail(alias expr, alias val)
{
    if(expr) return val;
}