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Add a static unwrap function over TermType.

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This commit is contained in:
Rob Rix 2015-10-22 13:05:08 -04:00
parent 6bcbccfe08
commit 89adf2cc86
1 changed files with 4 additions and 0 deletions
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4
prototype/Doubt/TermType.swift
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@ -7,6 +7,10 @@ public protocol TermType {
extension TermType {
public static func unwrap(term: Self) -> Syntax<Self, LeafType> {
return term.unwrap
}
/// Catamorphism over `TermType`s.
///
/// Folds the tree encoded by the receiver into a single value by recurring top-down through the tree, applying `transform` to leaves, then to branches, and so forth.