wrote dsl for ast boiler plate generation

ast/gen/generate.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+)
+
+var fileName string
+
+func init() {
+	flag.StringVar(&fileName, "f", "", "ast file to generate from")
+}
+
+func main() {
+	flag.Parse()
+
+	bs, err := os.ReadFile(fileName)
+
+	tokens, errs := lex(string(bs))
+	if len(errs) > 0 {
+		for _, err := range errs {
+			fmt.Printf("%s\n", err.Error())
+		}
+		os.Exit(1)
+	}
+
+	ast, err := parse(tokens)
+	if err != nil {
+		fmt.Printf("%s\n", err.Error())
+		os.Exit(1)
+	}
+
+	name, output, err := transpile(ast)
+	if err != nil {
+		fmt.Printf("%s\n", err.Error())
+		os.Exit(1)
+	}
+
+	f, err := os.Create(strings.ToLower(name) + ".go")
+	if err != nil {
+		fmt.Printf("%s\n", err.Error())
+		os.Exit(1)
+	}
+
+	_, err = f.Write(output)
+	if err != nil {
+		fmt.Printf("%s\n", err.Error())
+		os.Exit(1)
+	}
+}