def p_postfix_expression(p):
'''postfix_expression : primary_expression
| postfix_expression '[' expression ']'
| postfix_expression '(' ')'
| postfix_expression '(' argument_expression_list ')'
| postfix_expression PERIOD IDENTIFIER
| postfix_expression PTR_OP IDENTIFIER
| postfix_expression INC_OP
| postfix_expression DEC_OP
'''
if len(p) == 2:
p[0] = p[1]
elif p[2] == '[':
p[0] = expressions.BinaryExpressionNode(
"array access", (lambda a, b: a[b]),
"(%s [%s])", (True, False),
p[1],
p[3])
elif p[2] == '(':
if p[3] == ')':
p[0] = expressions.CallExpressionNode(p[1], [])
else:
p[0] = expressions.CallExpressionNode(p[1], p[3])
elif p[2] == '.':
p[0] = expressions.AttributeExpressionNode(
(lambda x, a: getattr(x, a)), "(%s.%s)", p[1], p[3])
elif p[2] == '->':
p[0] = expressions.AttributeExpressionNode(
(lambda x, a: getattr(x.contents, a)), "(%s.contents.%s)", p[1], p[3])
elif p[2] == '++':
p[0] = expressions.UnaryExpressionNode("increment", (lambda x: x + 1),
"(%s + 1)", False, p[1])
elif p[2] == '--':
p[0] = expressions.UnaryExpressionNode("decrement", (lambda x: x - 1),
"(%s - 1)", False, p[1])
def p_unary_expression(p):
'''unary_expression : postfix_expression
| INC_OP unary_expression
| DEC_OP unary_expression
| unary_operator cast_expression
| SIZEOF unary_expression
| SIZEOF '(' type_name ')'
| asm_expression
'''
if len(p) == 2:
p[0] = p[1]
elif p[1] == 'sizeof':
if len(p) == 5:
p[0] = expressions.SizeOfExpressionNode(p[3])
else:
p[0] = expressions.SizeOfExpressionNode(p[2])
else:
name, op, format, can_be_ctype = prefix_ops_dict[p[1]]
p[0] = expressions.UnaryExpressionNode(name, op, format, can_be_ctype,
p[2])