breaking: revome ByteBuffer from API

bytebuf.v

@@ -1,26 +0,0 @@
-module runcmd
-
-import io
-
-// buffer creates simple bytes buffer that can be read through `io.Reader` interface.
-pub fn buffer(data []u8) ByteBuffer {
-	return ByteBuffer{
-		bytes: data
-	}
-}
-
-struct ByteBuffer {
-	bytes []u8
-mut:
-	pos int
-}
-
-// read reads `buf.len` bytes from internal bytes buffer and returns number of bytes read.
-pub fn (mut b ByteBuffer) read(mut buf []u8) !int {
-	if b.pos >= b.bytes.len {
-		return io.Eof{}
-	}
-	n := copy(mut buf, b.bytes[b.pos..])
-	b.pos += n
-	return n
-}

examples/write_to_child_stdin.v

@@ -1,6 +1,23 @@
+import io
 import strings
 import runcmd
 
+struct ByteBuffer {
+	bytes []u8
+mut:
+	pos int
+}
+
+// read reads `buf.len` bytes from internal bytes buffer and returns number of bytes read.
+pub fn (mut b ByteBuffer) read(mut buf []u8) !int {
+	if b.pos >= b.bytes.len {
+		return io.Eof{}
+	}
+	n := copy(mut buf, b.bytes[b.pos..])
+	b.pos += n
+	return n
+}
+
 fn main() {
 	input := 'Hello from parent process!'
 
@@ -8,8 +25,10 @@ fn main() {
 	// * `reader` reads input from the parent process; it will be copied to the
 	//    standard input of the child process.
 	// * `writer` accepts data from the child process; it will be copied from the
-	//    standard output of the child process.
+	//    standard output of the child process. This is optinal.
-	mut reader := runcmd.buffer(input.bytes())
+	mut reader := ByteBuffer{
+		bytes: input.bytes()
+	}
 	mut writer := strings.new_builder(4096)
 
 	// Prepare the command.