Add parser printer conformance to OptionalOneOf (#204)

stephencelis · web-flow · commit df6a89ab4aa5 · 2022-04-25T12:10:04.000-04:00
diff --git a/Sources/Parsing/Builders/OneOfBuilder.swift b/Sources/Parsing/Builders/OneOfBuilder.swift
@@ -144,3 +144,12 @@ public enum OneOfBuilder {
     }
   }
 }
+
+extension OneOfBuilder.OptionalOneOf: ParserPrinter where Wrapped: ParserPrinter {
+  @inlinable
+  public func print(_ output: Wrapped.Output, into input: inout Wrapped.Input) throws {
+    guard let wrapped = self.wrapped
+    else { throw PrintingError.manyFailed([], at: input) }
+    try wrapped.print(output, into: &input)
+  }
+}

Original file line number	Diff line number	Diff line change
`@@ -144,3 +144,12 @@ public enum OneOfBuilder {`
`144`	`144`	`}`
`145`	`145`	`}`
`146`	`146`	`}`
	`147`	`+`
	`148`	`+extension OneOfBuilder.OptionalOneOf: ParserPrinter where Wrapped: ParserPrinter {`
	`149`	`+ @inlinable`
	`150`	`+ public func print(_ output: Wrapped.Output, into input: inout Wrapped.Input) throws {`
	`151`	`+ guard let wrapped = self.wrapped`
	`152`	`+ else { throw PrintingError.manyFailed([], at: input) }`
	`153`	`+ try wrapped.print(output, into: &input)`
	`154`	`+ }`
	`155`	`+}`