comments support, script loading support

ast/eval.go

@@ -61,6 +61,8 @@ func (in *Token) Eval(funcs FuncTable, vars VarTable, cnvtUndefVars bool) *Token
                     "eval")
                 return nil
             }
+        } else {
+            res.Next = in.Next
         }
 
     case LIST:

ast/lex.go

@@ -121,6 +121,17 @@ func lex(input string) *Token {
         return -2
     }
 
+    // returns the end of the string OR the end of the line
+    matchLineEnd := func(start int) int {
+        for i := start; i < len(input); i++ {
+            if input[i] == '\n' {
+                return i
+            }
+        }
+
+        return len(input)
+    }
+
     needs_alloc := false
     start_pos := 0
     for i := 0; i < len(input); i++ {
@@ -137,13 +148,18 @@ func lex(input string) *Token {
             is_str = true
             needs_alloc = true
 
-        case ' ':
+        case ' ', '\n', '\t', '\v', '\f', '\r':
             if i == start_pos {
                 start_pos += 1
                 continue
             }
 
             needs_alloc = true
+
+        // comment case
+        case ';':
+            start_pos = i + 1
+            i = matchLineEnd(start_pos)
         }
 
         if needs_alloc {