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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift Collections open source project
//
// Copyright (c) 2023 - 2024 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
//
//===----------------------------------------------------------------------===//
extension Rope {
@inlinable
public func forEachWhile(
_ body: (Element) -> Bool
) -> Bool {
guard _root != nil else { return true }
return root.forEachWhile(body)
}
@inlinable
public func forEachWhile(
from position: Int,
in metric: some RopeMetric<Element>,
_ body: (Element, Element.Index?) -> Bool
) -> Bool {
guard _root != nil else {
precondition(position == 0, "Position out of bounds")
return true
}
return root.forEachWhile(from: position, in: metric, body)
}
}
extension Rope._Node {
@inlinable
internal func forEachWhile(
_ body: (Element) -> Bool
) -> Bool {
if isLeaf {
return readLeaf {
let c = $0.children
for i in 0 ..< c.count {
guard body(c[i].value) else { return false }
}
return true
}
}
return readInner {
let c = $0.children
for i in 0 ..< c.count {
guard c[i].forEachWhile(body) else { return false }
}
return true
}
}
@inlinable
internal func forEachWhile(
from position: Int,
in metric: some RopeMetric<Element>,
_ body: (Element, Element.Index?) -> Bool
) -> Bool {
if isLeaf {
return readLeaf {
let c = $0.children
var (slot, rem) = $0.findSlot(at: position, in: metric, preferEnd: false)
let i = metric.index(at: rem, in: c[slot].value)
if !body(c[slot].value, i) { return false }
slot += 1
while slot < c.count {
if !body(c[slot].value, nil) { return false }
slot += 1
}
return true
}
}
return readInner {
let c = $0.children
var (slot, rem) = $0.findSlot(at: position, in: metric, preferEnd: false)
if !c[slot].forEachWhile(from: rem, in: metric, body) { return false }
slot += 1
while slot < c.count {
if !c[slot].forEachWhile({ body($0, nil) }) { return false }
slot += 1
}
return true
}
}
}
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