Fix unary op emission

typon/trans/transpiler/phases/emit_cpp/expr.py

@@ -286,7 +286,9 @@ class ExpressionVisitor(NodeVisitor):
         yield from self.visit_unary_operation(node.op, node.operand)
 
     def visit_unary_operation(self, op, operand) -> Iterable[str]:
-        yield SYMBOLS[type(op)]
+        if type(op) != str:
+            op = SYMBOLS[type(op)]
+        yield op
         yield from self.prec("unary").visit(operand)
 
     def visit_IfExp(self, node: ast.IfExp) -> Iterable[str]: