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Can I use anonymous refinement types in sub and method signatures, or what is the “where” keyword doing in a signature?

April 26, 2017anonymous doing keyword method Refinement signature signatures sub types

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Can I use anonymous refinement types in sub and method signatures, or what is the “where” keyword doing in a signature?

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Refinement types can be placed in a signature for a subroutine or method, and are useful for validating what is being passed in. For example, a subroutine for sending a reminder email may take an “email” parameter.