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cac5807ae2
Eliminate the intermediate top_level_code function. Now that SIL is expressive enough to express a "main" function, there's no reason for it, and this eliminates a bunch of mystery code in IRGen to thunk from main to top_level_code by reaching for hardcoded symbol names. Demystify the special code for setting up C_ARGC and C_ARGV by having SILGen look for a transparent "_didEnterMain" hook in the stdlib and emit a call to it. Swift SVN r22525
46 lines
1.5 KiB
Swift
46 lines
1.5 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 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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public struct _Process {
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// Use lazy initialization of static properties to safely initialize the
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// public 'arguments' property on first use.
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static var _arguments: [String] = {
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map(0..<Int(C_ARGC)) { i in
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if let s = String.fromCStringRepairingIllFormedUTF8(C_ARGV[i]).0 {
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return s
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}
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return ""
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}
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}()
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/// The list of command-line arguments with which the current
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/// process was invoked.
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public var arguments : [String] {
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return _Process._arguments
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}
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}
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/// An instance that exposes API for interaction with processes
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public let Process = _Process()
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/// Intrinsic entry point invoked on entry to a standalone program's "main".
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@transparent
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public // COMPILER_INTRINSIC
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func _didEnterMain(argc: Int32,
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argv: UnsafeMutablePointer<UnsafeMutablePointer<Int8>>) {
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// Initialize the C_ARGC and C_ARGV variables with the values that were
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// passed in to main.
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C_ARGC = CInt(argc)
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C_ARGV = UnsafeMutablePointer(argv)
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}
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