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Function `dmd.mtype.Parameter.isCovariant`

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


						
				extern(C++) bool isCovariant
				(
				

				  bool returnByRef,
				

				  const(Parameter) p,
				

				  bool previewIn = global.params.previewIn
				

				) pure nothrow @nogc @safe const;

Parameters

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

Returns

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

Authors

Walter Bright

License

Boost License 1.0