SIL: make isEmpty and singleElement available for all Sequences

eeckstein · eeckstein · commit 34e1679c9116 · 2024-12-09T18:09:04.000+01:00
and not just for `CollectionLikeSequence`.
To support stdlib's lazy map and filter sequences.
diff --git a/SwiftCompilerSources/Sources/SIL/Utilities/SequenceUtilities.swift b/SwiftCompilerSources/Sources/SIL/Utilities/SequenceUtilities.swift
@@ -71,7 +71,7 @@ extension FormattedLikeArray {
 public protocol CollectionLikeSequence : FormattedLikeArray {
 }
 
-public extension CollectionLikeSequence {
+public extension Sequence {
   var isEmpty: Bool { !contains(where: { _ in true }) }
 
   var singleElement: Element? {

Original file line number	Diff line number	Diff line change
`@@ -71,7 +71,7 @@ extension FormattedLikeArray {`
`71`	`71`	`public protocol CollectionLikeSequence : FormattedLikeArray {`
`72`	`72`	`}`
`73`	`73`
`74`		`-public extension CollectionLikeSequence {`
	`74`	`+public extension Sequence {`
`75`	`75`	`var isEmpty: Bool { !contains(where: { _ in true }) }`
`76`	`76`
`77`	`77`	`var singleElement: Element? {`