正则表达式构造词法分析器 正则表达式是一个描述一组字符串的模板。正则表达式是使用多种操作符来组合更小的表达式构建类似算术表达式。 建立块的基本原则是正则表达式匹配一个单字符。多数字符，包括所有的字幕和数字，都是匹配它们自己的正则表达式。任何带有特殊含义的字符可以以反斜杠开头来进行引用。

Lexer\Debug\Lexer.exe
.....\Lexer\AutoPtr\AutoPtr.h
.....\.....\Common\DataBase.h
.....\.....\......\List.h
.....\.....\......\Queue.h
.....\.....\Lexer.cpp
.....\.....\Lexer.h
.....\.....\Lexer.rc
.....\.....\Lexer.vcxproj
.....\.....\Lexer.vcxproj.filters
.....\.....\Lexer.vcxproj.user
.....\.....\Regex\CharClass.cpp
.....\.....\.....\CharClass.h
.....\.....\.....\Dfa.cpp
.....\.....\.....\Dfa.h
.....\.....\.....\GrammarTree.cpp
.....\.....\.....\GrammarTree.h
.....\.....\.....\Nfa.cpp
.....\.....\.....\Nfa.h
.....\.....\.....\Regex.cpp
.....\.....\.....\Regex.h
.....\.....\Resource.h
.....\.....\stdafx.cpp
.....\.....\stdafx.h
.....\.....\targetver.h
.....\Lexer.sln
.....\Lexer.suo
.....\.....\AutoPtr
.....\.....\Common
.....\.....\Regex
.....\Debug
.....\Lexer
Lexer

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