refactor: replace _read and _modify with the new yielding accessors

kkebo · kkebo · commit 865a38cd42ec · 2025-11-22T22:43:37.000+09:00
https://github.com/swiftlang/swift-evolution/blob/main/proposals/0474-yi elding-accessors.md
diff --git a/Sources/GameOfLife/CellularAutomaton.swift b/Sources/GameOfLife/CellularAutomaton.swift
@@ -150,7 +150,7 @@ public struct CellularAutomaton {
     /// Accesses the cell at the specified position.
     @inlinable
     public subscript(x: Int, y: Int) -> Bool {
-        _read { yield self.map[y][x] }
-        _modify { yield &self.map[y][x] }
+        yielding borrow { yield self.map[y][x] }
+        yielding mutate { yield &self.map[y][x] }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -150,7 +150,7 @@ public struct CellularAutomaton {`
`150`	`150`	`/// Accesses the cell at the specified position.`
`151`	`151`	`@inlinable`
`152`	`152`	`public subscript(x: Int, y: Int) -> Bool {`
`153`		`- _read { yield self.map[y][x] }`
`154`		`- _modify { yield &self.map[y][x] }`
	`153`	`+ yielding borrow { yield self.map[y][x] }`
	`154`	`+ yielding mutate { yield &self.map[y][x] }`
`155`	`155`	`}`
`156`	`156`	`}`