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// RUN: %target-swiftc_driver -O -Rpass-missed=sil-assembly-vision-remark-gen -Xllvm -sil-disable-pass=FunctionSignatureOpts -emit-sil %s -o /dev/null -Xfrontend -verify
// REQUIRES: objc_interop
// REQUIRES: optimized_stdlib
// REQUIRES: swift_stdlib_no_asserts
import Foundation
//////////////////
// Generic Code //
//////////////////
public func forcedCast<NS, T>(_ ns: NS) -> T {
// Make sure the colon info is right so that the arrow is under the a.
return ns as! T // expected-remark @:13 {{unconditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-3:33 {{of 'ns'}}
}
public func forcedCast2<NS, T>(_ ns: NS) -> T {
// Make sure the colon info is right so that the arrow is under the a.
let x = ns
return x as! T // expected-remark @:12 {{unconditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-4:34 {{of 'ns'}}
// expected-note @-3:7 {{of 'x'}}
}
public func forcedCast3<NS, T>(_ ns: NS) -> T {
// Make sure the colon info is right so that the arrow is under the a.
var x = ns // expected-warning {{variable 'x' was never mutated}}
return x as! T // expected-remark @:12 {{unconditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-4:34 {{of 'ns'}}
// expected-note @-3:7 {{of 'x'}}
}
public func forcedCast4<NS, T>(_ ns: NS, _ ns2: NS) -> T {
// Make sure the colon info is right so that the arrow is under the a.
var x = ns
x = ns2
return x as! T // expected-remark @:12 {{unconditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-5:44 {{of 'ns2'}}
// expected-note @-4:7 {{of 'x'}}
}
public func condCast<NS, T>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
return ns as? T // expected-remark @:13 {{conditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-3:31 {{of 'ns'}}
}
public func condCast2<NS, T>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
let x = ns
return x as? T // expected-remark @:12 {{conditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-4:32 {{of 'ns'}}
// expected-note @-3:7 {{of 'x'}}
}
public func condCast3<NS, T>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
var x = ns // expected-warning {{variable 'x' was never mutated}}
return x as? T // expected-remark @:12 {{conditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-4:32 {{of 'ns'}}
// expected-note @-3:7 {{of 'x'}}
}
public func condCast4<NS, T>(_ ns: NS, _ ns2: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
var x = ns
x = ns2
return x as? T // expected-remark @:12 {{conditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-5:42 {{of 'ns2'}}
// expected-note @-4:7 {{of 'x'}}
}
public func condCast5<NS, T>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
//
// Today, we lose that x was assigned.
if let x = ns as? T { // expected-remark @:17 {{conditional runtime cast of value with type 'NS' to 'T'}}
return x // expected-note @-5:32 {{of 'ns'}}
}
return nil
}
public func condCast6<NS, T>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
//
// Today, we lose that x was assigned.
guard let x = ns as? T else { // expected-remark @:20 {{conditional runtime cast of value with type 'NS' to 'T'}}
return nil // expected-note @-5:32 {{of 'ns'}}
}
return x
}
//////////////////////////////////
// Any Object Constrained Casts //
//////////////////////////////////
public func forcedCast<NS: AnyObject, T: AnyObject>(_ ns: NS) -> T {
// Make sure the colon info is right so that the arrow is under the a.
//
// TODO: We should also note the retain as being on 'ns'.
return ns as! T // expected-remark @:13 {{unconditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-5:55 {{of 'ns'}}
// expected-remark @-2 {{retain of type 'NS'}}
}
public func forcedCast2<NS: AnyObject, T: AnyObject>(_ ns: NS) -> T {
// Make sure the colon info is right so that the arrow is under the a.
//
// Today, we seem to completely eliminate 'x' here in the debug info. TODO:
// Maybe we can recover this info somehow. We should also note the retain as being on 'ns'
let x = ns
return x as! T // expected-remark @:12 {{unconditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-7:56 {{of 'ns'}}
// expected-remark @-2 {{retain of type 'NS'}}
}
public func forcedCast3<NS: AnyObject, T: AnyObject>(_ ns: NS) -> T {
// Make sure the colon info is right so that the arrow is under the a.
//
// Today, we seem to completely eliminate 'x' here in the debug info. TODO:
// Maybe we can recover this info somehow.
var x = ns // expected-warning {{variable 'x' was never mutated}}
return x as! T // expected-remark @:12 {{unconditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-7:56 {{of 'ns'}}
// expected-remark @-2 {{retain of type 'NS'}}
}
// Interestingly today, with AnyObject codegen, we do not lose the assignment to
// x and say the cast is on ns2!
public func forcedCast4<NS: AnyObject, T: AnyObject>(_ ns: NS, _ ns2: NS) -> T {
// Make sure the colon info is right so that the arrow is under the a.
var x = ns
x = ns2
return x as! T // expected-remark @:12 {{unconditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-5:66 {{of 'ns2'}}
// expected-remark @-2 {{retain of type 'NS'}}
}
public func condCast<NS: AnyObject, T: AnyObject>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
return ns as? T // expected-remark @:13 {{conditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-3:53 {{of 'ns'}}
// expected-remark @-2 {{retain of type 'NS'}}
}
public func condCast2<NS: AnyObject, T: AnyObject>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
//
// Today, we seem to completely eliminate 'x' here in the debug info. TODO:
// Maybe we can recover this info somehow.
let x = ns
return x as? T // expected-remark @:12 {{conditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-7:54 {{of 'ns'}}
// expected-remark @-2 {{retain of type 'NS'}}
}
public func condCast3<NS: AnyObject, T: AnyObject>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
//
// Today, we seem to completely eliminate 'x' here in the debug info. TODO:
// Maybe we can recover this info somehow.
var x = ns // expected-warning {{variable 'x' was never mutated}}
return x as? T // expected-remark @:12 {{conditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-7:54 {{of 'ns'}}
// expected-remark @-2 {{retain of type 'NS'}}
}
public func condCast4<NS: AnyObject, T: AnyObject>(_ ns: NS, _ ns2: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
var x = ns
x = ns2
return x as? T // expected-remark @:12 {{conditional runtime cast of value with type 'NS' to 'T'}}
// expected-note @-5:64 {{of 'ns2'}}
// expected-remark @-2 {{retain of type 'NS'}}
}
public func condCast5<NS: AnyObject, T: AnyObject>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
//
// Today, we lose that x was assigned.
if let x = ns as? T { // expected-remark @:17 {{conditional runtime cast of value with type 'NS' to 'T'}}
return x // expected-note @-5:54 {{of 'ns'}}
} // expected-remark @-2 {{retain of type 'NS'}}
return nil
}
public func condCast6<NS: AnyObject, T: AnyObject>(_ ns: NS) -> T? {
// Make sure the colon info is right so that the arrow is under the a.
//
// Today, we lose that x was assigned.
guard let x = ns as? T else { // expected-remark @:20 {{conditional runtime cast of value with type 'NS' to 'T'}}
return nil // expected-note @-5:54 {{of 'ns'}}
} // expected-remark @-2 {{retain of type 'NS'}}
return x
}
//////////////////
// String Casts //
//////////////////
// We need to be able to recognize the conformances. We can't do this yet! But
// we will be able to!
#if false
// After fixing ARCSequenceOpts in https://github.com/apple/swift/pull/66221,
// it seems that there are some retains and releases not removed where they should be removed:
// TODO: reenable these test once rdar://110058022 is fixed
@inline(never)
public func testForcedCastNStoSwiftString(_ nsString: NSString) -> String {
let o: String = forcedCast(nsString)
return o
}
@inline(never)
public func testConditionalCastNStoSwiftString(_ nsString: NSString) -> String? {
let o: String? = condCast(nsString)
return o
}
#endif
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