cfmt-macros
To parse format strings, parse/unescape from ufmt are reused here.
实现过程参考了UFMT的实现，重用了其部分代码，parse/unescape，涉及到格式化字符串的解析
cfmt-macros
To parse format strings, parse/unescape from ufmt are reused here.
实现过程参考了UFMT的实现，重用了其部分代码，parse/unescape，涉及到格式化字符串的解析