Thun/docs/reference/cond.md

## cond Basis Function Combinator This combinator works like a case statement. It expects a single quote on the stack that must contain zero or more condition quotes and a default quote. Each condition clause should contain a quoted predicate followed by the function expression to run if that predicate returns true. If no predicates return true the default function runs. It works by rewriting into a chain of nested [ifte]{.title-ref} expressions, e.g.: [B0] T0] [[B1] T1] [D cond

[B0] [T0] [[B1] [T1] [D] ifte] ifte

Gentzen diagram.

Definition

if not basis.

Derivation

if not basis.

Source

if basis

Discussion

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Crosslinks

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