FIX: Parse flag like IrAttribute

src/Lib/Script/Ast/IrAttribute.cc

@@ -55,8 +55,7 @@ IrAttribute::parse(std::vector<Token> *tokens)
         parentAttributes.push_back(std::make_pair(name, valueToken.asQName()));
     };
 
-    getInnerTokenOpt(tokenListPop(tokens)).assertTypeSimple(TOKEN_COL);
-
+    if (getInnerTokenOpt(tokenListPop(tokens)).isSimple(TOKEN_COL)) {
         /* Attributes can be a list: `#(name: [ v1, v2 ])` */
         if (getInnerTokenOpt(tokenListPeek(tokens)).isSimple(TOKEN_BRACKET_LEFT)) {
             do {
@@ -73,4 +72,10 @@ IrAttribute::parse(std::vector<Token> *tokens)
             getInnerTokenOpt(tokenListPop(tokens)).assertTypeSimple(TOKEN_PARENT_RIGHT);
         }
     }
+
+    /* Attribute as a flag: `#(name)` */
+    else {
+        parentAttributes.push_back(std::make_pair(name, name));
+    }
+}
 }