fleshed out parser loop

pkg/shsh/parsers.go

@@ -21,11 +21,29 @@ const (
 )
 
 func Parse(arg *Token) {
+    switch arg.tag {
+    case LIST_T:
+        for i := arg; i; i = i.next {
+            Parse(i)
+        }
 
+        if list_is_operation(arg) {
+            arg.tag = OPERATION_T
+        }
+
+    case OPERAND_T:
+        if string_is_operator(arg._inner) {
+            arg.tag = OPERATOR_T
+        }
+
+    default:
+        ;// TODO: Tag a parse error?
+    }
 }
 
 func string_delimiters_valid(arg string) bool {
-
+    // TODO: Enhance this function
+    go
 }
 
 func list_is_operation(arg *Token) bool {