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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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 SwiftShims
/// Command-line arguments for the current process.
@_frozen // namespace
public enum CommandLine {
/// The backing static variable for argument count may come either from the
/// entry point or it may need to be computed e.g. if we're in the REPL.
@usableFromInline
internal static var _argc: Int32 = Int32()
/// The backing static variable for arguments may come either from the
/// entry point or it may need to be computed e.g. if we're in the REPL.
///
/// Care must be taken to ensure that `_swift_stdlib_getUnsafeArgvArgc` is
/// not invoked more times than is necessary (at most once).
@usableFromInline
internal static var _unsafeArgv:
UnsafeMutablePointer<UnsafeMutablePointer<Int8>?>
= _swift_stdlib_getUnsafeArgvArgc(&_argc)
/// Access to the raw argc value from C.
public static var argc: Int32 {
_ = CommandLine.unsafeArgv // Force evaluation of argv.
return _argc
}
/// Access to the raw argv value from C. Accessing the argument vector
/// through this pointer is unsafe.
public static var unsafeArgv:
UnsafeMutablePointer<UnsafeMutablePointer<Int8>?> {
return _unsafeArgv
}
/// Access to the swift arguments, also use lazy initialization of static
/// properties to safely initialize the swift arguments.
public static var arguments: [String]
= (0..<Int(argc)).map { String(cString: _unsafeArgv[$0]!) }
}