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[stdlib] Remove the UnboundedRange_ enum #18649

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[stdlib] Remove the UnboundedRange_ enum #18649

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17 changes: 1 addition & 16 deletions stdlib/public/core/Range.swift
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Expand Up @@ -827,22 +827,7 @@ extension Comparable {
/// let word2 = "grisly"
/// let changes = countLetterChanges(word1[...], word2[...])
/// // changes == 2
@_frozen // namespace
public enum UnboundedRange_ {
// FIXME: replace this with a computed var named `...` when the language makes
// that possible.

/// Creates an unbounded range expression.
///
/// The unbounded range operator (`...`) is valid only within a collection's
/// subscript.
public static postfix func ... (_: UnboundedRange_) -> () {
// This function is uncallable
}
}

/// The type of an unbounded range operator.
public typealias UnboundedRange = (UnboundedRange_)->()
public typealias UnboundedRange = (Never) -> PartialRangeFrom<Never>

extension Collection {
/// Accesses the contiguous subrange of the collection's elements specified
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2 changes: 2 additions & 0 deletions test/api-digester/Outputs/stability-stdlib-abi.swift.expected
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Expand Up @@ -73,3 +73,5 @@ Var _RawDictionaryStorage.empty has declared type change from _EmptyDictionarySi
Var _RawSetStorage.empty has declared type change from _EmptySetSingleton to __EmptySetSingleton

Func tryReallocateUniquelyReferenced(buffer:newMinimumCapacity:) has been removed

Enum UnboundedRange_ has been removed
3 changes: 3 additions & 0 deletions test/api-digester/Outputs/stability-stdlib-source.swift.expected
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@@ -1 +1,4 @@
Func tryReallocateUniquelyReferenced(buffer:newMinimumCapacity:) has been removed

/* FIXME(SR-9283): TypeAlias UnboundedRange has underlying type change from (UnboundedRange_) -> () to (Never) -> PartialRangeFrom<Never> */
Enum UnboundedRange_ has been removed
2 changes: 1 addition & 1 deletion test/type/types.swift
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Expand Up @@ -20,7 +20,7 @@ var d4 : () -> Int = { d2 } // expected-error{{function produces expected type

var e0 : [Int]
e0[] // expected-error {{cannot subscript a value of type '[Int]' with an index of type '()'}}
// expected-note @-1 {{overloads for 'subscript' exist with these partially matching parameter lists: ((UnboundedRange_) -> ()), (Int), (R), (Range<Int>), (Range<Self.Index>)}}
// expected-note @-1 {{overloads for 'subscript' exist with these partially matching parameter lists: ((Never) -> PartialRangeFrom<Never>), (Int), (R), (Range<Int>), (Range<Self.Index>)}}

var f0 : [Float]
var f1 : [(Int,Int)]
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