Parameter.isCovariant

Compute covariance of parameters this and p as determined by the storage classes of both.

class Parameter

const pure nothrow @nogc @safe

bool

isCovariant

(

bool previewIn = global.params.previewIn

)

Parameters

returnByRef bool: true if the function returns by ref
p Parameter: Parameter to compare with
previewIn bool: Whether -preview=in is being used, and thus if in means scope [ref].

Type: bool

true = this can be used in place of p false = nope