fix: preserve parentheses for statement exprs (#566)

Author: zawan-ila

pycparser/c_generator.py

@@ -133,7 +133,7 @@ def visit_IdentifierType(self, n):
  def _visit_expr(self, n):
  if isinstance(n, c_ast.InitList):
  return '{' + self.visit(n) + '}'
- elif isinstance(n, c_ast.ExprList):
+ elif isinstance(n, (c_ast.ExprList, c_ast.Compound)):
  return '(' + self.visit(n) + ')'
  else:
  return self.visit(n)

tests/test_c_generator.py

@@ -306,6 +306,13 @@ def test_exprlist_with_semi(self):
  }
  ''')
 
+ def test_exprlist_with_compound(self):
+ self._assert_ctoc_correct(r'''
+ void test(){
+ (sizeof (0), ({ if (0) ; else ; }));
+ }
+ ''')
+
  def test_exprlist_with_subexprlist(self):
  self._assert_ctoc_correct(r'''
  void x() {