Add basic compiler, parser, and main program + GNU LGPL

parser/parser.go

@@ -0,0 +1,30 @@
+package parser
+
+import (
+	"errors"
+	"io/ioutil"
+	"strings"
+)
+
+// THE HYLIA PARSER
+
+func ParseFile(filename string) ([]string error) {
+	// Hey, does the file we're trying to parse actually exist?
+	data, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return nil, err
+	}
+
+	// Parse the file, and ask "Is this a Hylia file?"
+	content := string(data)
+	if !strings.Contains(content, "<hylia>")|| !strings.Contains(content, "</hylia>") {
+		return nil, errors.New("The structure of this file is invalid. Are you sure this is a Hylia (.hy) file?")	
+	}
+
+	// Extract the custom elements, which are wrapped in <element> tags
+	elements := []string{}
+	// ... TODO
+
+	return elements, nil
+	
+}