[Issue 16590] Wrong di generation for ref methods

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16590

--- Comment #16 from Satoshi <satoshi at rikarin.org> ---
alias foo = (a, b) => less(b, a);

is rewritten asi:

alias foo = (__T42, __T43)(a, b) {
    return less(b, a);
}

Variable types are missing

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