Add monadic (fluent) interface for maybe #1
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Add just_if for filtering maybe
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Oops, CLion's PR UI is garbage, should have been against upstream. |
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This PR implements Dobiasd#288.
I've added new checks directly below the existing maybe tests to make sure it compiles.
An extra test on chaining the fluent interface is also included.
I've made the following additions to the API:
just_ifmethod (e.gfilterMfor our maybe functor) which I believe is missing.is_maybefrominternalto top-level as we need this forjoin, and I also think this is a very useful API to expose.