lib/strings: merge lib/parser here

The first idea of parser is to provide generic parser for both bytes and
string.
After we introduce lib/parser there is not much changes to that package.
Also, since we create another Parser in lib/bytes that accept and
return token as []byte, the lib/parser is not unique anymore.

The following function/methods changes to minimize conflict in the future,

  * Lines become LinesOfFile
  * New become NewParser
  * Open become OpenForParser
  * Token become Read
  * TokenEscaped become ReadEscaped
  * TokenTrimSpace become ReadNoSpace

1 files changed, 22 insertions, 0 deletions

diff --git a/lib/strings/parser_benchmark_test.go b/lib/strings/parser_benchmark_test.go
new file mode 100644
index 00000000..a41c2128
--- /dev/null
+++ b/lib/strings/parser_benchmark_test.go
@@ -0,0 +1,22 @@
+// Copyright 2019, Shulhan <ms@kilabit.info>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package strings
+
+import "testing"
+
+// Output:
+//
+// BenchmarkParser_Read-4          59117898                20.2 ns/op             0 B/op          0 allocs/op
+func BenchmarkParser_Read(b *testing.B) {
+	content := `abc;def`
+	delims := ` /;`
+
+	p := NewParser(content, delims)
+
+	for x := 0; x < b.N; x++ {
+		p.Read()
+		p.Load(content, delims)
+	}
+}