Andy Wingo • 3/10/2026

nominal types in webassembly

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This technical article delves into type equality in WebAssembly, contrasting structural types with the newer nominal typing system. It explains how recursive type groups provide a module-internal approximation of nominal types and details the standard's 'tag' keyword for defining truly nominal, unforgeable data types between modules.

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#type systems #Webassembly #Nominal Types
nominal types in webassembly

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