[go] Move generated parser to its own folder

- if we put it at project root and run gofmt ., vendor folder will get
formatted as well
  - golang/go#22173

Makefile

@@ -14,4 +14,4 @@ antlr:
 .PHONY: gen-parser
 gen-parser:
 	$(GEN_PARSER) -package org.reika.rcl.parser -o impl/rcl-j/src/main/java/org/reika/rcl/parser
-	$(GEN_PARSER) -package rcl -o impl/rcl-go -Dlanguage=Go
+	$(GEN_PARSER) -package rcl -o impl/rcl-go/rcl -Dlanguage=Go

impl/rcl-go/.gitignore

@@ -1 +1,2 @@
-vendor
+vendor
+.idea/

impl/rcl-go/Makefile

@@ -1,6 +1,10 @@
 .PHONY: test
 test:
-	go test -v -cover .
+	go test -v -cover ./rcl
+
+.PHONY: fmt
+fmt:
+	gofmt -d -l -w ./rcl
 
 .PHONY: install
 install:

impl/rcl-go/rcl/parser_test.go

@@ -0,0 +1,21 @@
+package rcl
+
+import (
+	"testing"
+
+	"github.com/antlr/antlr4/runtime/Go/antlr"
+	asst "github.com/stretchr/testify/assert"
+)
+
+func TestRCLParser_Rcl(t *testing.T) {
+	assert := asst.New(t)
+	input, err := antlr.NewFileStream("testdata/db-xephonk.rcl")
+	assert.Nil(err)
+	lexer := NewRCLLexer(input)
+	stream := antlr.NewCommonTokenStream(lexer, 0)
+	p := NewRCLParser(stream)
+	p.BuildParseTrees = true
+	tree := p.Rcl()
+	// TODO: visit the tree
+	t.Log(tree)
+}

impl/rcl-go/rcl/testdata/db-xephonk.rcl

@@ -0,0 +1,15 @@
+// a database example for awesome-time-series-database
+// https://github.com/xephonhq/awesome-time-series-database
+name = "Xephon-K"
+backends = [
+  "Cassandra",
+  "Local Disk"
+]
+oss = true
+github = "https://github.com/xephonhq/xephon-k"
+articles = [
+  {
+    name = "Introduction to Time Series Database",
+    url = "https://zhuanlan.zhihu.com/p/29367404"
+  }
+]