simplify lookahead in variable flag parsing

src/lexer.rs

@@ -53,11 +53,6 @@ impl Lexer {
         self.peek()
     }
 
-    pub fn truncate_iterator_to_cursor(&mut self) {
-        self.cursor += self.amt_peeked;
-        self.amt_peeked = 0;
-    }
-
     /// Set cursor to position and reset peek
     pub fn set_cursor(&mut self, cursor: usize) {
         self.cursor = cursor;

src/parse/variable.rs

@@ -132,11 +132,9 @@ impl<'a> Parser<'a> {
 
             match flag.node.as_str() {
                 "global" => {
-                    self.toks.truncate_iterator_to_cursor();
                     global = true;
                 }
                 "default" => {
-                    self.toks.truncate_iterator_to_cursor();
                     default = true;
                 }
                 _ => {

tests/variables.rs

@@ -385,6 +385,10 @@ error!(
     no_value_only_flag,
     "$a: !default;", "Error: Expected expression."
 );
+error!(
+    variable_value_after_flag,
+    "$a: !default red;", "Error: Expected expression."
+);
 error!(
     uppercase_flag,
     "$a: 1 !GLOBAL;", "Error: Invalid flag name."