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8b55a0f61b
For Swift 3 / 4: Deprecate the spelling "ImplicitlyUnwrappedOptional", emitting a warning and suggesting "!" in places where they are allowed according to SE-0054. In places where SE-0054 disallowed IUOs but we continued to accept them in previous compilers, emit a warning suggesting "Optional" or "?" as an alternative depending on context and treat the IUO as an Optional, noting this in the diagnostic. For Swift 5: Treat "ImplicitlyUnwrappedOptional" as an error, suggesting "!" in places where they are allowed by SE-0054. In places where SE-0054 disallowed IUOs, emit an error suggestion "Optional" or "?" as an alternative depending on context.
50 lines
1.5 KiB
Swift
50 lines
1.5 KiB
Swift
// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -typecheck -verify %s
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// REQUIRES: objc_interop
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import blocks
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import Foundation
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var someNSString : NSString
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func useString(_ s: String) {}
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accepts_block { }
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someNSString.enumerateLines {(s:String?) in }
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someNSString.enumerateLines {s in }
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someNSString.enumerateLines({ useString($0) })
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accepts_block(/*not a block=*/()) // expected-error{{cannot convert value of type '()' to expected argument type 'my_block_t' (aka '() -> ()'}}
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func testNoEscape(f: @convention(block) () -> Void, nsStr: NSString,
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fStr: (String?) -> Void) {
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accepts_noescape_block(f)
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accepts_noescape_block(f)
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// Please see related tests in PrintAsObjC/imported-block-typedefs.swift.
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// rdar://problem/19818617
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nsStr.enumerateLines(fStr) // okay due to @noescape
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_ = nsStr.enumerateLines as Int // expected-error{{cannot convert value of type '((String) -> Void) -> Void' to type 'Int' in coercion}}
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}
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func checkTypeImpl<T>(_ a: inout T, _: T.Type) {}
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do {
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var blockOpt = blockWithoutNullability()
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checkTypeImpl(&blockOpt, Optional<my_block_t>.self)
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var _: my_block_t = blockWithoutNullability()
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}
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do {
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var block = blockWithNonnull()
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checkTypeImpl(&block, my_block_t.self)
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}
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do {
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var blockOpt = blockWithNullUnspecified()
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checkTypeImpl(&blockOpt, Optional<my_block_t>.self)
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var _: my_block_t = blockWithNullUnspecified()
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}
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do {
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var block = blockWithNullable()
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checkTypeImpl(&block, Optional<my_block_t>.self)
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}
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