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Refinement Types

Refinement Types

Refinement Types are a feature.

A type endowed with a predicate which is assumed to hold for any element of the refined type.

Languages with Refinement Types include Raku

Example from Raku:
subset Color of Any where Color | CMYK_Color;
reference-feature.html 路 refinement-type-feature.html 路 runtime-guards-feature.html

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