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945c09b1cc
When we determine that an optional value needs to be unwrapped to make
an expression type check, use notes to provide several different
Fix-It options (with descriptions) rather than always pushing users
toward '!'. Specifically, the errors + Fix-Its now looks like this:
error: value of optional type 'X?' must be unwrapped to a value of
type 'X'
f(x)
^
note: coalesce using '??' to provide a default when the optional
value contains 'nil'
f(x)
^
?? <#default value#>
note: force-unwrap using '!' to abort execution if the optional
value contains 'nil'
f(x)
^
!
Fixes rdar://problem/42081852.
51 lines
1.8 KiB
Swift
51 lines
1.8 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 Foundation
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func iuo_error(prop: IUOProperty) {
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let _: Coat? = prop.iuo.optional()
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// expected-error@-1 {{value of optional type '(() -> Coat?)?' must be unwrapped}}
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// expected-note@-2{{coalesce}}
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// expected-note@-3{{force-unwrap}}
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let _: Coat? = prop.iuo.optional()!
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// expected-error@-1 {{cannot invoke 'optional' with no arguments}}
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let _: Coat? = prop.iuo.optional!()
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let _: Coat? = prop.iuo.optional!()!
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let _: Coat? = prop.iuo!.optional()
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// expected-error@-1 {{value of optional type '(() -> Coat?)?' must be unwrapped}}
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// expected-note@-2{{coalesce}}
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// expected-note@-3{{force-unwrap}}
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let _: Coat? = prop.iuo!.optional()!
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// expected-error@-1 {{cannot invoke 'optional' with no arguments}}
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let _: Coat? = prop.iuo!.optional!()
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let _: Coat? = prop.iuo!.optional!()!
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let _: Coat = prop.iuo.optional()
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// expected-error@-1 {{value of optional type '(() -> Coat)?' must be unwrapped}}
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// expected-note@-2{{coalesce}}
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// expected-note@-3{{force-unwrap}}
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let _: Coat = prop.iuo.optional()!
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// expected-error@-1 {{cannot invoke 'optional' with no arguments}}
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let _: Coat = prop.iuo.optional!()
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let _: Coat = prop.iuo.optional!()!
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let _: Coat = prop.iuo!.optional()
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// expected-error@-1 {{value of optional type '(() -> Coat)?' must be unwrapped}}
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// expected-note@-2{{coalesce}}
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// expected-note@-3{{force-unwrap}}
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let _: Coat = prop.iuo!.optional()!
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// expected-error@-1 {{cannot invoke 'optional' with no arguments}}
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let _: Coat = prop.iuo!.optional!()
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let _: Coat = prop.iuo!.optional!()!
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let _ = prop.iuo.name
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}
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protocol X {}
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extension X where Self : OptionalRequirements {
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func test() {
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let _ = self.name
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}
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}
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