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// RUN: %empty-directory(%t)
// RUN: split-file %s %t
// RUN: %target-swift-frontend -typecheck %t/use-optional.swift -typecheck -module-name UseOptional -enable-experimental-cxx-interop -emit-clang-header-path %t/UseOptional.h
// RUN: %target-interop-build-clangxx -fno-exceptions -std=gnu++20 -c %t/optional-execution.cpp -I %t -o %t/swift-stdlib-execution.o
// RUN: %target-build-swift %t/use-optional.swift -o %t/swift-stdlib-execution -Xlinker %t/swift-stdlib-execution.o -module-name UseOptional -Xfrontend -entry-point-function-name -Xfrontend swiftMain
// RUN: %target-codesign %t/swift-stdlib-execution
// RUN: %target-run %t/swift-stdlib-execution | %FileCheck %s
// REQUIRES: executable_test
//--- use-optional.swift
@_expose(Cxx)
public struct SmallStruct {
public let x: Int16
}
@_expose(Cxx)
public enum RawEnum: Int16 {
case first = 1
case second = 3
}
@_expose(Cxx)
public class Klass {
public let x: Int16
init(_ x: Int16) {
self.x = x
print("init-Klass")
}
deinit {
print("deinit-Klass")
}
}
@_expose(Cxx)
public func createCIntOpt(_ val: CInt) -> Optional<CInt> {
return val
}
@_expose(Cxx)
public func takeCIntOpt(_ val: Optional<CInt>) {
print(String(describing: val))
}
@_expose(Cxx)
public func createSmallStructOpt(_ val: Int16) -> Optional<SmallStruct> {
return SmallStruct(x: val)
}
@_expose(Cxx)
public func takeSmallStructOpt(_ val: Optional<SmallStruct>) {
print(String(describing: val))
}
@_expose(Cxx)
public func createKlassOpt(_ val: Int16) -> Klass? {
return Klass(val)
}
@_expose(Cxx)
public func takeKlassOpt(_ val: Klass?) {
print(String(describing: val))
}
@_expose(Cxx)
public func resetOpt<T>(_ val: inout Optional<T>) {
val = .none
}
//--- optional-execution.cpp
#include <cassert>
#include "UseOptional.h"
int main() {
using namespace swift;
using namespace UseOptional;
{
auto val = createCIntOpt(2);
takeCIntOpt(val);
assert((bool)val);
assert(val.isSome());
assert(val.getUnsafelyUnwrapped() == 2);
assert(val.get() == 2);
resetOpt(val);
assert(!(bool)val);
assert(val.isNone());
takeCIntOpt(val);
}
// CHECK: Optional(2)
// CHECK-NEXT: nil
{
auto val = Optional<int>::some(-97);
takeCIntOpt(val);
assert((bool)val);
assert(val.get() == -97);
auto val2 = Optional<int>::none();
assert(!(bool)val2);
takeCIntOpt(val2);
}
// CHECK-NEXT: Optional(-97)
// CHECK-NEXT: nil
{
auto val = createSmallStructOpt(0xFA);
takeSmallStructOpt(val);
assert((bool)val);
assert(val.isSome());
assert(val.getUnsafelyUnwrapped().getX() == 0xFA);
assert(val.get().getX() == 0xFA);
resetOpt(val);
assert(!(bool)val);
assert(val.isNone());
takeSmallStructOpt(val);
}
// CHECK-NEXT: Optional(UseOptional.SmallStruct(x: 250))
// CHECK-NEXT: nil
{
auto val = createKlassOpt(-256);
takeKlassOpt(val);
assert(val.isSome());
auto ptr = val.getUnsafelyUnwrapped();
assert(ptr.getX() == -256);
resetOpt(val);
assert(val.isNone());
takeKlassOpt(val);
}
// CHECK-NEXT: init-Klass
// CHECK-NEXT: Optional(UseOptional.Klass)
// CHECK-NEXT: nil
// CHECK-NEXT: deinit-Klass
{
auto val = RawEnum::init(1);
assert(val.isSome());
assert(val.getUnsafelyUnwrapped() == RawEnum::first);
assert(val.getUnsafelyUnwrapped().getRawValue() == 1);
auto val2 = RawEnum::init(2);
assert(val2.isNone());
}
return 0;
}
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