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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.
11 lines
383 B
Swift
11 lines
383 B
Swift
// RUN: %target-typecheck-verify-swift
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let x: Bool = 3/4 as Float > 1/2 as Float
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func testInIf(a: Any) {
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if a as? Float {} // expected-error {{cannot be used as a boolean}} {{6-6=((}} {{17-17=) != nil)}}
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let _: Float = a as? Float // expected-error {{value of optional type 'Float?' must be unwrapped}}
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// expected-note@-1{{coalesce}}
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// expected-note@-2{{force-unwrap}}
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}
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