C++ TINY扩充正则表达式的语法

根据提供的引用内容，C++ TINY扩充正则表达式的语法如下：

1. program -> declarations stmt-sequence
2. declarations -> decl ; declarations | ε
3. decl -> type-specifier var-list
4. type-specifier -> int | bool | string | float | double | regex
5. var-list -> identifier { , identifier }
6. statement -> if-stmt | repeat-stmt | assign-stmt | read-stmt | write-stmt | while-stmt
7. while-stmt -> do stmt-sequence while bool-exp
8. bool-exp -> bool-term { or bool-term }
9. bool-term -> bool-factor { and bool-factor }
10. bool-factor -> [not] bool-primary
11. bool-primary -> identifier | literal | ( bool-exp ) | regex-exp
12. regex-exp -> / pattern /
13. pattern -> pattern-primary { pattern-concat pattern-primary }
14. pattern-primary -> character | . | ( pattern )
15. pattern-concat -> pattern-primary { pattern-primary }
16. character -> a | b | ... | z | A | B | ... | Z | 0 | 1 | ... | 9

其中，regex表示正则表达式类型，regex-exp表示正则表达式表达式，pattern表示正则表达式模式，pattern-primary表示正则表达式模式的基本单元，pattern-concat表示正则表达式模式的连接操作。