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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2020 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
//
//===----------------------------------------------------------------------===//
#if compiler(>=6)
package import LanguageServerProtocol
import SwiftExtensions
#else
import LanguageServerProtocol
import SwiftExtensions
#endif
/// A request and a callback that returns the request's reply
package final class RequestAndReply<Params: RequestType>: Sendable {
package let params: Params
private let replyBlock: @Sendable (LSPResult<Params.Response>) -> Void
/// Whether a reply has been made. Every request must reply exactly once.
private let replied: AtomicBool = AtomicBool(initialValue: false)
package init(_ request: Params, reply: @escaping @Sendable (LSPResult<Params.Response>) -> Void) {
self.params = request
self.replyBlock = reply
}
deinit {
precondition(replied.value, "request never received a reply")
}
/// Call the `replyBlock` with the result produced by the given closure.
package func reply(_ body: @Sendable () async throws -> Params.Response) async {
precondition(!replied.value, "replied to request more than once")
replied.value = true
do {
replyBlock(.success(try await body()))
} catch {
replyBlock(.failure(ResponseError(error)))
}
}
}
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