From aef95721a43490dbbb77c13a2e4deba834bbf90c Mon Sep 17 00:00:00 2001
From: David 'Epper' Marshall <epper.marshall@gmail.com>
Date: Sun, 8 May 2022 00:15:42 -0400
Subject: [PATCH] strings: builder: add clear (#14328)

---
 vlib/strings/builder.c.v       | 8 +++-----
 vlib/strings/builder.js.v      | 7 +++----
 vlib/strings/builder_test.js.v | 3 +++
 vlib/strings/builder_test.v    | 2 ++
 4 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/vlib/strings/builder.c.v b/vlib/strings/builder.c.v
index 70b262f348..490b94d770 100644
--- a/vlib/strings/builder.c.v
+++ b/vlib/strings/builder.c.v
@@ -50,11 +50,9 @@ pub fn (mut b Builder) write_runes(runes []rune) {
 	}
 }
 
-// write_b appends a single `data` byte to the accumulated buffer
-[deprecated: 'Use write_u8() instead']
-[deprecated_after: '2022-02-11']
-pub fn (mut b Builder) write_b(data u8) {
-	b << data
+// clear clears the buffer contents
+pub fn (mut b Builder) clear() {
+	b = []u8{cap: b.cap}
 }
 
 // write_u8 appends a single `data` byte to the accumulated buffer
diff --git a/vlib/strings/builder.js.v b/vlib/strings/builder.js.v
index 3340582589..108abb0227 100644
--- a/vlib/strings/builder.js.v
+++ b/vlib/strings/builder.js.v
@@ -18,13 +18,12 @@ pub fn new_builder(initial_size int) Builder {
 	return []u8{cap: initial_size}
 }
 
-[deprecated: 'Use write_u8() instead']
-pub fn (mut b Builder) write_b(data u8) {
+pub fn (mut b Builder) write_byte(data byte) {
 	b << data
 }
 
-pub fn (mut b Builder) write_byte(data byte) {
-	b << data
+pub fn (mut b Builder) clear() {
+	b = []u8{cap: b.cap}
 }
 
 pub fn (mut b Builder) write_u8(data u8) {
diff --git a/vlib/strings/builder_test.js.v b/vlib/strings/builder_test.js.v
index 70701a7f86..dc25577e44 100644
--- a/vlib/strings/builder_test.js.v
+++ b/vlib/strings/builder_test.js.v
@@ -39,6 +39,9 @@ fn test_sb() {
 	assert last_2 == '56'
 	final_sb := sb.str()
 	assert final_sb == '1234'
+
+	sb.clear()
+	assert sb.str() == ''
 	//}
 }
 
diff --git a/vlib/strings/builder_test.v b/vlib/strings/builder_test.v
index 69d86b188f..14614f3f8c 100644
--- a/vlib/strings/builder_test.v
+++ b/vlib/strings/builder_test.v
@@ -40,6 +40,8 @@ fn test_sb() {
 	final_sb := sb.str()
 	assert final_sb == '1234'
 	//}
+	sb.clear()
+	assert sb.str() == ''
 }
 
 fn test_big_sb() {