Sum Types

(2026). Sum Types. Lean Reference Manual.

Type

Web resource

Intellectual base

Web

Year

2026

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1 citation across 1 artifact.

Domain-specific

• Tagged union
  • … between constitutive identity and a convenient observable transfers from A result type has constructors Ok carrying a value and Error carrying an error object; its tag selects which payload is meaningful. to A low-level protocol record stores an explicit message-kind field next to a union of case-specific layouts..

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