执行此匹配的第一步叫做扫描或词法分析。
The first step in performing this match is called scanning, or lexical analysis.
扫描，也称词法分析。
上面的 typographify.def中所示的语法提供了Spark词法分析程序／扫描程序的设计指南。
The grammar shown above in typographify.def provides guidance for the design of a Spark lexer/scanner.
扫描程序有时又把它称为词法分析程序。
词法分析的主要任务是：从左到右逐个字符地扫描源程序，产生一个个单词(Token)，同时检查源程序中的词法错误。
Lexical analysis of the main tasks are: to scan source code character by character from left to right, resulting in one word (Token), also check the source of lexical errors.
执行词法分析的程序称为词法分析程序或扫描程序(Scanner)。
Perform lexical analysis program called lexical analyzer or scanner (scanner).
执行词法分析的程序称为词法分析程序或扫描程序(Scanner)。
Perform lexical analysis program called lexical analyzer or scanner (scanner).
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