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version 2.109.1

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Alias std.typecons.WhiteHole

WhiteHole!Base is a subclass of Base which automatically implements all abstract member functions as functions that always fail. These functions simply throw an Error and never return. Whitehole is useful for trapping the use of class member functions that haven't been implemented.

alias WhiteHole(Base) = AutoImplement!(Base,generateAssertTrap,isAbstractFunction);

The name came from Class::WhiteHole Perl module by Michael G Schwern.

Parameters

NameDescription
Base A non-final class for WhiteHole to inherit from.

See Also

AutoImplement, generateAssertTrap

Example

import std.exception : assertThrown;

static class C
{
    abstract void notYetImplemented();
}

auto c = new WhiteHole!C;
assertThrown!NotImplementedError(c.notYetImplemented()); // throws an Error

Authors

Andrei Alexandrescu, Bartosz Milewski, Don Clugston, Shin Fujishiro, Kenji Hara

License

Boost License 1.0.