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//===--- PopFrontGeneric.swift --------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2021 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
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import TestsUtils
public let benchmarks =
BenchmarkInfo(
name: "PopFrontArrayGeneric",
runFunction: run_PopFrontArrayGeneric,
tags: [.validation, .api, .Array],
legacyFactor: 20)
let arrayCount = 1024
// This test case exposes rdar://17440222 which caused rdar://17974483 (popFront
// being really slow).
protocol MyArrayBufferProtocol : MutableCollection, RandomAccessCollection {
mutating func myReplace<C>(
_ subRange: Range<Int>,
with newValues: C
) where C : Collection, C.Element == Element
}
extension Array : MyArrayBufferProtocol {
mutating func myReplace<C>(
_ subRange: Range<Int>,
with newValues: C
) where C : Collection, C.Element == Element {
replaceSubrange(subRange, with: newValues)
}
}
func myArrayReplace<
B: MyArrayBufferProtocol,
C: Collection
>(_ target: inout B, _ subRange: Range<Int>, _ newValues: C)
where C.Element == B.Element, B.Index == Int {
target.myReplace(subRange, with: newValues)
}
@inline(never)
public func run_PopFrontArrayGeneric(_ n: Int) {
let orig = Array(repeating: 1, count: arrayCount)
var a = [Int]()
for _ in 1...n {
var result = 0
a.append(contentsOf: orig)
while a.count != 0 {
result += a[0]
myArrayReplace(&a, 0..<1, EmptyCollection())
}
check(result == arrayCount)
}
}
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