[stdlib] Adopt @_requiresConcreteImplementation for RandomNumberGenerator requirement

xwu · xwu · commit 5feb51779341 · 2020-03-14T16:20:18.000-04:00
diff --git a/stdlib/public/core/Random.swift b/stdlib/public/core/Random.swift
@@ -60,6 +60,7 @@ public protocol RandomNumberGenerator {
   /// method.
   ///
   /// - Returns: An unsigned 64-bit random value.
+  @_requiresConcreteImplementation
   mutating func next() -> UInt64
 }
 

Original file line number	Diff line number	Diff line change
`@@ -60,6 +60,7 @@ public protocol RandomNumberGenerator {`
`60`	`60`	`/// method.`
`61`	`61`	`///`
`62`	`62`	`/// - Returns: An unsigned 64-bit random value.`
	`63`	`+ @_requiresConcreteImplementation`
`63`	`64`	`mutating func next() -> UInt64`
`64`	`65`	`}`
`65`	`66`