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|
//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2023 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
//
//===----------------------------------------------------------------------===//
// This test file has been translated from swift/test/Parse/foreach_async.swift
import XCTest
final class ForeachAsyncTests: ParserTestCase {
func testForeachAsync1() {
assertParse(
"""
import _Concurrency
"""
)
}
func testForeachAsync2() {
assertParse(
"""
struct AsyncRange<Bound: Comparable & Strideable>: AsyncSequence, AsyncIteratorProtocol where Bound.Stride : SignedInteger {
var range: Range<Bound>.Iterator
typealias Element = Bound
mutating func next() async -> Element? { return range.next() }
func cancel() { }
func makeAsyncIterator() -> Self { return self }
}
"""
)
}
func testForeachAsync3() {
assertParse(
"""
struct AsyncIntRange<Int> : AsyncSequence, AsyncIteratorProtocol {
typealias Element = (Int, Int)
func next() async -> (Int, Int)? {}
func cancel() { }
typealias AsyncIterator = AsyncIntRange<Int>
func makeAsyncIterator() -> AsyncIntRange<Int> { return self }
}
"""
)
}
func testForeachAsync4() {
assertParse(
"""
func for_each(r: AsyncRange<Int>, iir: AsyncIntRange<Int>) async {
var sum = 0
// Simple foreach loop, using the variable in the body
for await i in r {
sum = sum + i
}
}
"""
)
}
// Check scoping of variable introduced with foreach loop
// For-each loops with two variables and varying degrees of typedness
func testForeachAsync5() {
assertParse(
"""
func for_each(r: AsyncRange<Int>, iir: AsyncIntRange<Int>) async {
var sum = 0
for await (i, j) in iir {
sum = sum + i + j
}
}
"""
)
assertParse(
"""
func for_each(r: AsyncRange<Int>, iir: AsyncIntRange<Int>) async {
var sum = 0
for await (i, j) in iir {
sum = sum + i + j
}
}
"""
)
assertParse(
"""
func for_each(r: AsyncRange<Int>, iir: AsyncIntRange<Int>) async {
var sum = 0
for await (i, j) : (Int, Int) in iir {
sum = sum + i + j
}
}
"""
)
}
// Parse errors
func testForeachAsync6() {
assertParse(
"""
func for_each(r: AsyncRange<Int>, iir: AsyncIntRange<Int>) async {
var sum = 0
for await i 1️⃣r {
}
}
""",
diagnostics: [
DiagnosticSpec(message: "expected 'in' in 'for' statement", fixIts: ["insert 'in'"])
],
fixedSource: """
func for_each(r: AsyncRange<Int>, iir: AsyncIntRange<Int>) async {
var sum = 0
for await i in r {
}
}
"""
)
assertParse(
"""
func for_each(r: AsyncRange<Int>, iir: AsyncIntRange<Int>) async {
var sum = 0
for await i in r 1️⃣sum = sum + i;2️⃣
}
""",
diagnostics: [
DiagnosticSpec(locationMarker: "1️⃣", message: "expected '{' in 'for' statement", fixIts: ["insert '{'"]),
DiagnosticSpec(locationMarker: "2️⃣", message: "expected '}' to end 'for' statement", fixIts: ["insert '}'"]),
],
fixedSource: """
func for_each(r: AsyncRange<Int>, iir: AsyncIntRange<Int>) async {
var sum = 0
for await i in r { sum = sum + i;
}
}
"""
)
}
}
|
