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Move preconditions into where clauses.

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This commit is contained in:
Rob Rix 2015-11-03 11:28:52 -05:00
parent cd720b79de
commit 1b8e5850f5
1 changed files with 6 additions and 6 deletions
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12
prototype/Doubt/Syntax.swift
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@ -90,12 +90,12 @@ extension Syntax {
switch (left, right) {
case let (.Leaf(l1), .Leaf(l2)):
return leaf(l1, l2)
case let (.Indexed(v1), .Indexed(v2)):
return v1.count == v2.count && zip(v1, v2).reduce(true) { $0 && recur($1) }
case let (.Fixed(v1), .Fixed(v2)):
return v1.count == v2.count && zip(v1, v2).reduce(true) { $0 && recur($1) }
case let (.Keyed(d1), .Keyed(d2)):
return Set(d1.keys) == Set(d2.keys) && d1.keys.reduce(true) { $0 && recur(d1[$1]!, d2[$1]!) }
case let (.Indexed(v1), .Indexed(v2)) where v1.count == v2.count:
return zip(v1, v2).reduce(true) { $0 && recur($1) }
case let (.Fixed(v1), .Fixed(v2)) where v1.count == v2.count:
return zip(v1, v2).reduce(true) { $0 && recur($1) }
case let (.Keyed(d1), .Keyed(d2)) where Set(d1.keys) == Set(d2.keys):
return d1.keys.reduce(true) { $0 && recur(d1[$1]!, d2[$1]!) }
default:
return false
}