templated overload of opAssign

[frame]

On Saturday, 3 April 2021 at 13:46:17 UTC, kdevel wrote:
> Why does this code

>    ec.opAssign (bar (1)); // okay
> //   ec = bar (1); // Error: expression bar(1) is void and has 
> no value

> compile with the abovementioned error?

You cannot assign void returned from bar() as parameter to 
opAssign(). The lazy keyword creates some internal delegate, thus 
opAssign() works instead. I'm afraid lazy storage class only 
works with arguments, not rvalues.