allow != in variables

src/parse/variable.rs

@@ -155,19 +155,25 @@ impl<'a> Parser<'a> {
                 }
                 '!' => {
                     let pos = tok.pos();
-                    if self.toks.peek_forward(1).is_none() {
+                    match self.toks.peek_forward(1) {
-                        return Err(("Expected identifier.", pos).into());
+                        Some(Token { kind: '=', .. }) => {
+                            self.toks.reset_cursor();
+                            val_toks.push(self.toks.next().unwrap());
+                            continue;
+                        }
+                        Some(..) => {}
+                        None => return Err(("Expected identifier.", pos).into()),
                     }
                     // todo: it should not be possible to declare the same flag more than once
                     let mut ident = peek_ident_no_interpolation(self.toks, false, pos)?;
                     ident.node.make_ascii_lowercase();
                     match ident.node.as_str() {
                         "global" => {
-                            self.toks.take(7).for_each(drop);
+                            self.toks.truncate_iterator_to_cursor();
                             global = true;
                         }
                         "default" => {
-                            self.toks.take(8).for_each(drop);
+                            self.toks.truncate_iterator_to_cursor();
                             default = true;
                         }
                         "important" => {

tests/variables.rs

@@ -133,6 +133,11 @@ test!(
     "$a: red;\n\na {\n  $a: green !\\67 lobal;\n}\n\na {\n  color: $a;\n}\n",
     "a {\n  color: green;\n}\n"
 );
+test!(
+    not_equal_in_variable_decl,
+    "$a: red != blue;\n\na {\n    color: $a;\n}\n",
+    "a {\n  color: true;\n}\n"
+);
 error!(ends_with_bang, "$a: red !;", "Error: Expected identifier.");
 error!(unknown_flag, "$a: red !foo;", "Error: Invalid flag name.");
 error!(