direct_abstract_declaratorà
'(' abstract_declarator ')'
| '[' ']'
| '[' constant_expression ']'
| direct_abstract_declarator '[' ']'
| direct_abstract_declarator '[' constant_expression ']'
| '(' ')'
| direct_abstract_declarator '(' ')'
| direct_abstract_declarator '(' parameter_type_list ')'
labeled_statementà
IDENTIFIER ':' statement
| CASE constant_expression ':' statement
| DEFAULT ':' statement
作者：rill_zhen