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cca27d02a0
Keep calm: remember that the standard library has many more public exports than the average target, and that this contains ALL of them at once. I also deliberately tried to tag nearly every top-level decl, even if that was just to explicitly mark things @internal, to make sure I didn't miss something. This does export more than we might want to, mostly for protocol conformance reasons, along with our simple-but-limiting typealias rule. I tried to also mark things private where possible, but it's really going to be up to the standard library owners to get this right. This is also only validated against top-level access control; I haven't fully tested against member-level access control yet, and none of our semantic restrictions are in place. Along the way I also noticed bits of stdlib cruft; to keep this patch understandable, I didn't change any of them. Swift SVN r19145
101 lines
2.8 KiB
Swift
101 lines
2.8 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 enum FloatingPointClassification {
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case SignalingNaN
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case QuietNaN
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case NegativeInfinity
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case NegativeNormal
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case NegativeSubnormal
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case NegativeZero
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case PositiveZero
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case PositiveSubnormal
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case PositiveNormal
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case PositiveInfinity
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}
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extension FloatingPointClassification : Equatable {}
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@public
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func ==(lhs: FloatingPointClassification, rhs: FloatingPointClassification) -> Bool {
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switch (lhs, rhs) {
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case (.SignalingNaN, .SignalingNaN),
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(.QuietNaN, .QuietNaN),
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(.NegativeInfinity, .NegativeInfinity),
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(.NegativeNormal, .NegativeNormal),
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(.NegativeSubnormal, .NegativeSubnormal),
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(.NegativeZero, .NegativeZero),
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(.PositiveZero, .PositiveZero),
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(.PositiveSubnormal, .PositiveSubnormal),
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(.PositiveNormal, .PositiveNormal),
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(.PositiveInfinity, .PositiveInfinity):
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return true
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default:
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return false
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}
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}
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@public protocol FloatingPointNumber {
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typealias _BitsType
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class func _fromBitPattern(bits: _BitsType) -> Self
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func _toBitPattern() -> _BitsType
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/// The positive infinity.
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class var infinity: Self { get }
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/// A quiet NaN.
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class var NaN: Self { get }
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/// A quiet NaN.
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class var quietNaN: Self { get }
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/// @{
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/// IEEE 754-2008 Non-computational operations.
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// IEEE 754 calls this 'class', but this name is a keyword, and is too
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// general.
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var floatingPointClass: FloatingPointClassification { get }
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/// Returns true if this number has a negative sign.
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var isSignMinus: Bool { get }
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/// Returns true if this number is normal (not zero, subnormal, infinity, or
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/// NaN).
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var isNormal: Bool { get }
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/// Returns true if this number is zero, subnormal, or normal (not infinity
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/// or NaN).
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var isFinite: Bool { get }
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/// Returns true if this number is +0.0 or -0.0.
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var isZero: Bool { get }
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/// Returns true if this number is subnormal.
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var isSubnormal: Bool { get }
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/// Returns true if this number is infinity.
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var isInfinite: Bool { get }
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/// Returns true if this number is NaN.
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var isNaN: Bool { get }
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/// Returns true if this number is a signaling NaN.
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var isSignaling: Bool { get }
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// Not implemented, because it only makes sense for decimal floating point.
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// Binary floating point numbers are always canonical.
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// func isCanonical() -> Bool
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/// @}
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}
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