From 37b056948d058679efa4e87fb6c9b2a2ddfa31a3 Mon Sep 17 00:00:00 2001
From: Caleb Spare <cespare@gmail.com>
Date: Tue, 31 Oct 2017 16:51:21 -0700
Subject: strings: add Builder

This is like a write-only subset of bytes.Buffer with an
allocation-free String method.

Fixes #18990.

Change-Id: Icdf7240f4309a52924dc3af04a39ecd737a210f4
Reviewed-on: https://go-review.googlesource.com/74931
Run-TryBot: Caleb Spare <cespare@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
---
 src/strings/example_test.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/strings/example_test.go')

diff --git a/src/strings/example_test.go b/src/strings/example_test.go
index f7a78b4385..607e4a0a70 100644
--- a/src/strings/example_test.go
+++ b/src/strings/example_test.go
@@ -351,3 +351,14 @@ func ExampleTrimRightFunc() {
 	}))
 	// Output: ¡¡¡Hello, Gophers
 }
+
+func ExampleBuilder() {
+	var b strings.Builder
+	for i := 3; i >= 1; i-- {
+		fmt.Fprintf(&b, "%d...", i)
+	}
+	b.WriteString("ignition")
+	fmt.Println(b.String())
+
+	// Output: 3...2...1...ignition
+}
-- 
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