Removed panic on "no tokens provided".

README.md

@@ -28,8 +28,8 @@ asl [-v|-r|-pretty|--help] <input directory> <output directory>
 | -r | optional | Read input directory recursively. |
 | -pretty | optional | Enable pretty printing to SQF. |
 | --help | optional | Show usage. |
-| <input directory> | required | Directory to read ASL files from. |
+| input directory | required | Directory to read ASL files from. |
-| <output directory> | required | Directory for SQF output. Can be the same as input directory. |
+| output directory | required | Directory for SQF output. Can be the same as input directory. |
 
 **Example:**
 

ToDo.md

@@ -11,6 +11,9 @@
 * ~~negative values e.g. -1, operator !~~
 * ~~tokenizer splits commands like "format" -> for, mat~~
 * ~~try ... catch~~
+* better error reporting
+    - recover panic
+    - line, column
 
 ## Special cases
 

src/asl/parser.go

@@ -9,7 +9,9 @@ const TAB = "    "
 // Parses tokens, validates code to a specific degree
 // and writes SQF code into desired location.
 func Parse(token []Token, prettyPrinting bool) string {
-	initParser(token, prettyPrinting)
+	if !initParser(token, prettyPrinting) {
+	    return ""
+	}
 
 	for tokenIndex < len(token) {
 		parseBlock()

src/asl/parserHelper.go

@@ -7,9 +7,9 @@ var offset int
 var pretty bool
 
 // Initilizes the parser.
-func initParser(token []Token, prettyPrinting bool) {
+func initParser(token []Token, prettyPrinting bool) bool {
 	if len(token) == 0 {
-		panic("No tokens provided")
+		return false
 	}
 
 	tokens = token
@@ -17,6 +17,8 @@ func initParser(token []Token, prettyPrinting bool) {
 	out = ""
 	offset = 0
 	pretty = prettyPrinting
+	
+	return true
 }
 
 // Returns true, if current token matches expected one.