substvars


1
2
3
4
5
6
7
8
9
10

Common-Description:
 flex is a tool for generating "scanners".  A scanner is a program which
 recognizes lexical patterns in text.  flex reads the given input files, or its
 standard input if no file names are given, for a description of a scanner to
 generate.  The description is in the form of pairs of regular expressions and C
 code, called "rules".  flex generates as output a C source file, lex.yy.c by
 default, which defines a routine yylex().  This file can be compiled and linked
 with the flex runtime library to produce an executable.  When the executable is
 run, it analyzes its input for occurrences of the regular expressions.
 Whenever it finds one, it executes the corresponding C code.