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5650f80937
This will allows us to build the standard library in resilient mode by default, hopefully, without performance regression. <rdar://problem/36362648>
53 lines
2.0 KiB
Swift
53 lines
2.0 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import SwiftShims
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/// Command-line arguments for the current process.
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@_fixed_layout // FIXME(sil-serialize-all)
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public enum CommandLine {
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/// The backing static variable for argument count may come either from the
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/// entry point or it may need to be computed e.g. if we're in the REPL.
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@_versioned
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internal static var _argc: Int32 = Int32()
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/// The backing static variable for arguments may come either from the
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/// entry point or it may need to be computed e.g. if we're in the REPL.
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///
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/// Care must be taken to ensure that `_swift_stdlib_getUnsafeArgvArgc` is
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/// not invoked more times than is necessary (at most once).
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@_versioned
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internal static var _unsafeArgv:
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UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>
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= _swift_stdlib_getUnsafeArgvArgc(&_argc)
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/// Access to the raw argc value from C.
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@_inlineable // FIXME(sil-serialize-all)
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public static var argc: Int32 {
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_ = CommandLine.unsafeArgv // Force evaluation of argv.
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return _argc
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}
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/// Access to the raw argv value from C. Accessing the argument vector
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/// through this pointer is unsafe.
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@_inlineable // FIXME(sil-serialize-all)
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public static var unsafeArgv:
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UnsafeMutablePointer<UnsafeMutablePointer<Int8>?> {
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return _unsafeArgv
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}
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/// Access to the swift arguments, also use lazy initialization of static
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/// properties to safely initialize the swift arguments.
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public static var arguments: [String]
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= (0..<Int(argc)).map { String(cString: _unsafeArgv[$0]!) }
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}
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