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// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend -enable-experimental-feature Extern -enable-experimental-feature Embedded -enforce-exclusivity=none %s -c -o %t/a.o
// RUN: %target-clang -x c -c %S/Inputs/print.c -o %t/print.o
// RUN: %target-clang %t/a.o %t/print.o -o %t/a.out
// RUN: %target-run %t/a.out | %FileCheck %s
// REQUIRES: swift_in_compiler
// REQUIRES: executable_test
// REQUIRES: optimized_stdlib
// REQUIRES: OS=macosx || OS=linux-gnu
@_silgen_name("putchar")
@discardableResult
func putchar(_: CInt) -> CInt
public func print(_ s: StaticString, terminator: StaticString = "\n") {
var p = s.utf8Start
while p.pointee != 0 {
putchar(CInt(p.pointee))
p += 1
}
p = terminator.utf8Start
while p.pointee != 0 {
putchar(CInt(p.pointee))
p += 1
}
}
@_silgen_name("print_long")
func print_long(_: Int)
public func print(_ n: Int, terminator: StaticString = "\n") {
print_long(n)
print("", terminator: terminator)
}
@_silgen_name("malloc")
func malloc(_: Int) -> UnsafeMutableRawPointer
struct Bytes<T>: Collection {
var storage: UnsafeMutableBufferPointer<T>
var size: Int
init(size: Int, initialValue: T) {
self.storage = .init(start: malloc(MemoryLayout<T>.stride * size).assumingMemoryBound(to: T.self), count: size)
self.storage.initialize(repeating: initialValue)
self.size = size
}
func index(after i: Int) -> Int {
return i + 1
}
subscript(position: Int) -> T {
get {
return storage[position]
}
set(newValue) {
storage[position] = newValue
}
}
public subscript(bounds: Range<Index>) -> SubSequence {
get { fatalError() }
set { fatalError() }
}
var startIndex: Int { return 0 }
var endIndex: Int { return size }
typealias Element = T
typealias Index = Int
typealias SubSequence = Bytes
}
func foo() {
var bytes = Bytes<Int>(size: 10, initialValue: 0)
bytes[4] = 42
bytes[2] = 22
bytes[6] = 13
bytes[6] = 15
bytes[8] = 9
bytes[9] = -1
print(bytes[0]) // CHECK: 0
print(bytes.max()!)// CHECK: 42
print(bytes.min()!) // CHECK: -1
}
foo()
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