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70 lines
2.5 KiB
Swift
70 lines
2.5 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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// Extern C functions
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//===----------------------------------------------------------------------===//
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// FIXME: Once we have an FFI interface, make these have proper function bodies
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@asmname("putchar")
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func _putchar(value: Int32) -> Int32
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@transparent public func _countLeadingZeros(value: Int64) -> Int64 {
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return Int64(Builtin.int_ctlz_Int64(value.value, false.value))
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}
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@transparent public func _autorelease(x: AnyObject) {
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Builtin.retain(x)
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Builtin.autorelease(x)
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}
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/// Check if a given object (of value or reference type) conforms to the given
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/// protocol.
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///
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/// Limitation: `DestType` should be a protocol defined in the `Swift` module.
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@asmname("swift_stdlib_conformsToProtocol")
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public func _stdlib_conformsToProtocol<SourceType, DestType>(
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value: SourceType, _: DestType.Type
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) -> Bool
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/// Cast the given object (of value or reference type) to the given protocol
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/// type. Traps if the object does not conform to the protocol.
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///
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/// Limitation: `DestType` should be a protocol defined in the `Swift` module.
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@asmname("swift_stdlib_dynamicCastToExistential1Unconditional")
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public func _stdlib_dynamicCastToExistential1Unconditional<
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SourceType, DestType
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>(
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value: SourceType, _: DestType.Type
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) -> DestType
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/// Cast the given object (of value or reference type) to the given protocol
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/// type. Returns `.None` if the object does not conform to the protocol.
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///
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/// Limitation: `DestType` should be a protocol defined in the `Swift` module.
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@asmname("swift_stdlib_dynamicCastToExistential1")
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public func _stdlib_dynamicCastToExistential1<SourceType, DestType>(
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value: SourceType, _: DestType.Type
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) -> DestType?
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@asmname("swift_stdlib_getTypeName")
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func _stdlib_getTypeNameImpl<T>(value: T, result: UnsafePointer<String>)
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/// Returns the mangled type name for the given value.
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public func _stdlib_getTypeName<T>(value: T) -> String {
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var resultPtr = UnsafePointer<String>.alloc(1)
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_stdlib_getTypeNameImpl(value, resultPtr)
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let result = resultPtr.memory
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resultPtr.dealloc(1)
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return result
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}
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