Lex helps write programs whose control flow is directed by instances of regular expressions in the input stream. It is well suited for editor-scr ipt type transformations and for segmenting input in preparation for a parsing routine.

A compiler or interptreter for a programminning language is often decomposed into two parts: Read the source program and discover its structure. Process this structure, e.g. to generate the target program. Lex and Yacc can generate program f

代码编辑器，用于代开PERL脚本代码进行编辑，也可以编辑C、C++、Java等语言程序-Code editor for the generation of open source PERL scr ipt editing, you can edit the C, C++, Java and other language programs

SAPscr ipt由下面五个部分组成： 1)编辑器用来编辑一行文本。如果用户决定维护与应用程序相关的文本，应用程序事务会自动调用这个文本编辑器， 2)styles和forms，用来打印layout。 3)中央输出模块设计器。它的任务是根据相应的格式信息为某种外部设备准备文本，这些格式信息来自于分配了文本的style和forms。 -SAPscr ipt by the following five components: 1) editor to edit the line of