Skip += fast path for literal segments, too

beccadax · beccadax · commit f23d1cd7cec1 · 2018-10-31T21:34:39.000-07:00
diff --git a/stdlib/public/core/StringInterpolation.swift b/stdlib/public/core/StringInterpolation.swift
@@ -84,7 +84,7 @@ public struct DefaultStringInterpolation: StringInterpolationProtocol {
   /// interpreting string interpolations.
   @inlinable
   public mutating func appendLiteral(_ literal: String) {
-    _storage += literal
+    literal.write(to: &self)
   }
   
   /// Interpolates the given value's textual representation into the

Original file line number	Diff line number	Diff line change
`@@ -84,7 +84,7 @@ public struct DefaultStringInterpolation: StringInterpolationProtocol {`
`84`	`84`	`/// interpreting string interpolations.`
`85`	`85`	`@inlinable`
`86`	`86`	`public mutating func appendLiteral(_ literal: String) {`
`87`		`- _storage += literal`
	`87`	`+ literal.write(to: &self)`
`88`	`88`	`}`
`89`	`89`
`90`	`90`	`/// Interpolates the given value's textual representation into the`