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fits is a method.

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This commit is contained in:
Rob Rix 2015-09-28 22:12:08 -04:00
parent 9928fdaa77
commit 1829404979
1 changed files with 11 additions and 11 deletions
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22
prototype/Doubt/Doc.swift
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@ -13,6 +13,16 @@ public enum Doc: CustomStringConvertible, Equatable {
return "\n" + String(count: n, repeatedValue: " " as Character) + doc.description
}
}
public func fits(width: Int) -> Bool {
guard width >= 0 else { return false }
switch self {
case .Empty, .Line:
return true
case let .Text(s, x):
return x.fits(width - Int(s.characters.count))
}
}
}
public enum DOC {
@ -107,21 +117,11 @@ func be(w: Int, _ k: Int, _ z: Stream<(Int, DOC)>) -> Doc {
}
func better(w: Int, _ k: Int, _ x: Doc, _ y: Doc) -> Doc {
return fits(w - k, x)
return x.fits(w - k)
? x
: y
}
func fits(w: Int, _ x: Doc) -> Bool {
guard w >= 0 else { return false }
switch x {
case .Empty, .Line:
return true
case let .Text(s, x):
return fits(w - Int(s.characters.count), x)
}
}
public protocol CustomDocConvertible: CustomStringConvertible {
var doc: DOC { get }