关键字(Keyword) 符号(Sign) 标示符(Identifier):^[a-zA-Z_][0-9a-zA-Z_]*[!?]?$ ##数据类型
数字类型(Number) 字符串(String) 正则表达式(RegEx) 终止符(EndSymbol)
当源代码读完了,如果状态机处于Normal状态,此时应该生成一个EndSymbol ###对于非 Normal 状态,我只需要关心两个过程:
1.何时从 Normal 跳转到该状态; 2.何时从该状态跳回 Normal 状态。
Implementing a Simple Compiler with Java
关键字(Keyword) 符号(Sign) 标示符(Identifier):^[a-zA-Z_][0-9a-zA-Z_]*[!?]?$ ##数据类型
数字类型(Number) 字符串(String) 正则表达式(RegEx) 终止符(EndSymbol)
当源代码读完了,如果状态机处于Normal状态,此时应该生成一个EndSymbol ###对于非 Normal 状态,我只需要关心两个过程:
1.何时从 Normal 跳转到该状态; 2.何时从该状态跳回 Normal 状态。
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