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Description: fast lexical analyzer generator
Flex is a tool for generating scanners: programs which recognized lexical
patterns in text. It reads the given input files 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, which defines a routine yylex(). This file is compiled
and linked with the -lfl 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.
Description: A fast lexical analyzer generator.
flex is a tool for generating scanners: programs which recognized lexical
patterns in text. flex reads the given input files 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, which defines a routine yylex(). This file is compiled
and linked with the -lfl 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.
.
The behaviour of Flex has undergone a major change since version
2.5.4a; Flex scanners are now reenterant, you may have multiple
scanners in the same program with differing sets of defaults, and
they play nicer with modern C and C++ compilers. The Flip side is
that Flex no longer conforms to the POSIX lex behaviour, and the
scanners require conforming implementations when flex is used in ANSI
C mode. The package flex-old provides the older behaviour.
.
This product includes software developed by the University of California,
Berkeley and its contributors. The upstream source code can be found at
http://prdownloads.sourceforge.net/flex/flex-2.5.33.tar.bz2?download
The project web page is at http://flex.sf.net/
--- 220796 Thu Jan 1 00:00:00 1970
+++ 22786 Thu Jan 1 00:00:00 1970
@@ -1,9 +1,22 @@
-fast lexical analyzer generator
- Flex is a tool for generating scanners: programs which recognized lexical
- patterns in text. It reads the given input files for a description of a
+A fast lexical analyzer generator.
+ flex is a tool for generating scanners: programs which recognized lexical
+ patterns in text. flex reads the given input files 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
+ expressions and C code, called rules. flex generates as output a C source
file, lex.yy.c, which defines a routine yylex(). This file is compiled
and linked with the -lfl 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.
+ .
+ The behaviour of Flex has undergone a major change since version
+ 2.5.4a; Flex scanners are now reenterant, you may have multiple
+ scanners in the same program with differing sets of defaults, and
+ they play nicer with modern C and C++ compilers. The Flip side is
+ that Flex no longer conforms to the POSIX lex behaviour, and the
+ scanners require conforming implementations when flex is used in ANSI
+ C mode. The package flex-old provides the older behaviour.
+ .
+ This product includes software developed by the University of California,
+ Berkeley and its contributors. The upstream source code can be found at
+ http://prdownloads.sourceforge.net/flex/flex-2.5.33.tar.bz2?download
+ The project web page is at http://flex.sf.net/