FLEX

FLEX is a grammar language created in 1987 by Vern Paxson.

#143on PLDB	36Years Old	4.4kUsers
78Books	4Papers

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Flex (fast lexical analyzer generator) is a free and open-source software alternative to lex. It is a computer program that generates lexical analyzers (also known as "scanners" or "lexers"). It is frequently used as the lex implementation together with Berkeley Yacc parser generator on BSD-derived operating systems (as both lex and yacc are part of POSIX), or together with GNU bison (a version of yacc) in *BSD ports and in Linux distributions. Read more on Wikipedia...

FLEX website
FLEX Wikipedia page
FLEX is developed on GitHub and has 2,618 stars
PLDB has 2 documentation sites for FLEX: www.di.uminho.pt, www.geeksforgeeks.org
FLEX first developed in University of California, Berkeley
FLEX on HOPL
See also: (5 related languages)Bison, Yacc, C, RATFOR, PL/0
Read more about FLEX on the web: 1.
HTML of this page generated by LanguagePage.ts

Example from Riju:

%{
#include <stdio.h>
%}

%%
%%

int yywrap() {
  printf("Hello, world!\n");
  return 1;
}

int main() {
  yylex();
  return 0;
}

Example from Wikipedia:

%{
#include "y.tab.h"
%}

digit         [0-9]
letter        [a-zA-Z]

%%
"+"                  { return PLUS;       }
"-"                  { return MINUS;      }
"*"                  { return TIMES;      }
"/"                  { return SLASH;      }
"("                  { return LPAREN;     }
")"                  { return RPAREN;     }
";"                  { return SEMICOLON;  }
","                  { return COMMA;      }
"."                  { return PERIOD;     }
":="                 { return BECOMES;    }
"="                  { return EQL;        }
"<>"                 { return NEQ;        }
"<"                  { return LSS;        }
">"                  { return GTR;        }
"<="                 { return LEQ;        }
">="                 { return GEQ;        }
"begin"              { return BEGINSYM;   }
"call"               { return CALLSYM;    }
"const"              { return CONSTSYM;   }
"do"                 { return DOSYM;      }
"end"                { return ENDSYM;     }
"if"                 { return IFSYM;      }
"odd"                { return ODDSYM;     }
"procedure"          { return PROCSYM;    }
"then"               { return THENSYM;    }
"var"                { return VARSYM;     }
"while"              { return WHILESYM;   }
{letter}({letter}|{digit})* {
                       yylval.id = strdup(yytext);
                       return IDENT;      }
{digit}+             { yylval.num = atoi(yytext);
                       return NUMBER;     }
[ \t\n\r]            /* skip whitespace */
.                    { printf("Unknown character [%c]\n",yytext[0]);
                       return UNKNOWN;    }
%%

int yywrap(void){return 1;}

title	author	year	reviews	ratings	rating
Programming Flex 2	Chafic Kazoun	2007	4	35	3.31
Programming Flex 3	Chafic Kazoun	2008	1	9	3.44

Books about FLEX from ISBNdb

title	authors	year	publisher
Flex 4 Cookbook: Real-world recipes for developing Rich Internet Applications (Cookbooks (O'Reilly))	Joshua Noble and Todd Anderson and Garth Braithwaite and Marco Casario and Rich Tretola and David Tucker	2010	Adobe Developer Library
Adobe Flex 3: Training from the Source	Tapper, Jeff and Labriola, Michael and Boles, Matthew and Talbot, James	2008	Adobe Press
Foundation ActionScript 3.0 with Flash CS3 and Flex	McSharry, Sean and YardFace, Gerald and Webster, Steve	2007	Apress
Learning Flex 3: Getting up to Speed with Rich Internet Applications (Adobe Developer Library)	Cole, Alaric	2008	Adobe Developer Library
Programming Flex 3	Kazoun, Chafic; Lott, Joey	20080514	O'Reilly Media, Inc.
Getting Started with Flex 4	Stallons, Jeanette and Shorten, Andrew and Genovese, Vince	2010	Adobe Developer Library
Creating Mashups with Adobe Flex and AIR (Friends of Ed Abobe Learning Library)	Korhonen, Chris and Hassoun, David	2008	Apress
Programming Flex 2: The Comprehensive Guide to Creating Rich Internet Applications with Adobe Flex	Chafic Kazoun and Joey Lott	2007	Adobe Developer Library
Creating Visual Experiences with Flex 3.0	Sanchez, Juan and McIntosh, Andy	2008	Addison-Wesley Professional
Rich Internet Applications with Adobe Flex and Java : Secrets of the Masters	Fain, Yakov; Rasputnis, Victor; Tartakovsky, Anatole	2022	SYS-CON Media
Apollo for Adobe Flex Developers Pocket Guide	Mike Chambers; Rob Dixon; Jeff Swartz	20070309	O'Reilly Media, Inc.
Foundation ActionScript 3.0 for Flash and Flex	Darren Richardson; Paul Milbourne	20091109	Springer Nature
The Essential Guide to Flex 2 with ActionScript 3.0	Charles Brown	20070510	Springer Nature
Foundation Flex for Developers: Data-Driven Applications with PHP, ASP.NET, ColdFusion, and LCDS	Jacobs, Sas	2007	Apress
flex & bison: Text Processing Tools	Levine, John	2009	O'Reilly Media
Compiler Design Using FLEX and YACC	Das, Vinu V.	2007	PHI
Effortless Flex 4 Development	Ullman, Larry	2010	New Riders
Adobe Flex 4.5 Fundamentals: Training from the Source	Labriola, Michael and Tapper, Jeff	2011	Adobe Press
ActionScript 3.0 Cookbook: Solutions for Flash Platform and Flex Application Developers	Lott, Joey and Schall, Darron and Peters, Keith	2006	Adobe Developer Library
Adobe Flex 4: Training from the Source, Volume 1	Labriola, Michael and Tapper, Jeff and Boles, Matthew	2010	Adobe Press
Developing Flex 4 Components: Using ActionScript & MXML to Extend Flex and AIR Applications	Jones, Mike	2011	Addison-Wesley Professional
Flex 3 with Java	Kore, Satish	2009	Packt Publishing
Creating Visual Experiences with Flex 3.0	Sanchez, Juan and McIntosh, Andy	2008	Addison-Wesley Professional
Foundation ActionScript 3.0 for Flash and Flex (Foundations)	Richardson, Darren and Milbourne, Paul	2009	Apress
Flex 3 with Java	Kore, Satish	2009	Packt Publishing
Learning Flex 4: Getting Up to Speed with Rich Internet Application Design and Development (Adobe Developer Library)	Cole, Alaric and Robison, Elijah	2010	Adobe Developer Library
Beginning Java and Flex: Migrating Java, Spring, Hibernate and Maven Developers to Adobe Flex (Expert's Voice in Web Development)	di Pisa, Filippo	2009	Apress
Flex 4 Fun	Haase, Chet	2010	Artima Inc
Foundation XML and E4X for Flash and Flex (Foundations)	Jacobs, Sas	2009	Apress
The Essential Guide to Flex 3 (Essentials)	Brown, Charles	2008	Apress
Professional Adobe Flex 2 (Programmer to Programmer)	Tretola, Rich and Barber, Simon and Erickson, Renaun	2007	Wrox
Apollo for Adobe Flex Developers Pocket Guide	Chambers, Mike and Dixon, Rob and Swartz, Jeff	2007	Adobe Developer Library
Getting Started with Flex 3: An Adobe Developer Library Pocket Guide for Developers (Pocket Reference (O'Reilly))	Herrington, Jack D. and Kim, Emily	2008	Adobe Developer Library
AdvancED Flex 4	Tiwari, Shashank and Elrom, Elad and Schulze, Charlie	2010	Apress
flex & bison	John Levine	20090805	O'Reilly Media, Inc.
Flex Solutions	Marco Casario	20080226	Springer Nature
flex & bison	John Levine	20090805	O'Reilly Media, Inc.
Programming Flex 2	Kazoun, Chafic.	2007	O'reilly
Learning Flex 4	Alaric Cole; Elijah Robison	20101102	O'Reilly Media, Inc.
Programming Flex 2	Chafic Kazoun; Joey Lott	20070416	O'Reilly Media, Inc.
Flex 3 Cookbook	Joshua Noble; Todd Anderson	20080513	O'Reilly Media, Inc.
AdvancED Flex 3	Shashank Tiwari; Elad Elrom	20081123	Springer Nature
Programming Flex 3	Chafic Kazoun; Joey Lott	20080919	O'Reilly Media, Inc.
Flex on Rails: building rich Internet applications with Adobe Flex 3 and Rails 2	Hillerson, Tony.		Addison-wesley
Flex Early Evaluation: Assessing Flex and Your Project Needs	Anthony Franco	20070530	O'Reilly Media, Inc.
Hello! Flex 4	Peter Armstrong	20091031	Simon & Schuster
Flex 4 Cookbook	Joshua Noble; Todd Anderson; Garth Braithwaite; Marco Casario; Rich Tretola	20100511	O'Reilly Media, Inc.
Flex 3 Early Evaluation: Assessing Flex and Your Project Needs	The EffectiveUI Team	20070921	O'Reilly Media, Inc.
Foundation Flex for Developers	Sas Jacobs	20080302	Springer Nature
Flex 4 in Action	Dan Orlando; Joel Hooks; Tariq Ahmed	20101114	Simon & Schuster
AdvancED Flex Application Development	Chris Charlton; R Blank; Omar Gonzalez; Hasan Otuome	20080805	Springer Nature
Foundation Flex for Designers	Greg Goralski; Lordalex Leon	20080311	Springer Nature
Developing Flex 4 Components	Mike E. Jones	20110110	Pearson Technology Group
Enterprise Development with Flex	Yakov Fain; Victor Rasputnis; Anatole Tartakovsky	20100316	O'Reilly Media, Inc.
Flex Mobile in Action	Jonathan Campos	20120530	Simon & Schuster
Introduction to Flex 2	Roger Braunstein	20070228	O'Reilly Media, Inc.
Beginning Java and Flex	Filippo di Pisa	20100402	Springer Nature
Getting Started with Flex 3	Jack D. Herrington; Emily Kim; Adobe Development Team	20080624	O'Reilly Media, Inc.
Flex On Rails: Building Rich Internet Applications With Adobe Flex 3 And Rails 2	Hillerson, Tony.	2009	Addison-wesley
Programming Flex 2: The Comprehensive Guide to Creating Rich Internet Applications with Adobe Flex	Kazoun, Chafic; Lott, Joey	04/2007	O'Reilly Media, Inc.
Programming Flex 3: The Comprehensive Guide to Creating Rich Internet Applications with Adobe Flex	Kazoun, Chafic; Lott, Joey	09/2008	O'Reilly Media, Inc.
Developing iOS Applications with Flex 4.5	Rich Tretola	20110824	O'Reilly Media, Inc.
Developing Android Applications with Flex 4.5	Rich Tretola	20110509	O'Reilly Media, Inc.
Developing iOS Applications with Flex 4.5	Rich Tretola	20110824	O'Reilly Media, Inc.
Agile Enterprise Application Development with Flex	The EffectiveUI Team	20080125	O'Reilly Media, Inc.
Developing Android Applications with Flex 4.5	Rich Tretola	20110509	O'Reilly Media, Inc.
The Essential Guide to Flex 3	Charles Brown	20080828	Springer Nature
Agile Enterprise Application Development with Flex	The EffectiveUI Team; Tony Hillerson	20080125	O'Reilly Media, Inc.
Adobe Flex 77 Success Secrets - 77 Most Asked Questions On Adobe Flex - What You Need To Know	Timothy Sosa	20140316	Emereo
Foundation XML and E4X for Flash and Flex	Sas Jacobs	20090221	Springer Nature
Foundation ActionScript 3.0 with Flash CS3 and Flex	Sean McSharry; Gerald YardFace; Steve Webster	20080731	Springer Nature
Flex 3 Cookbook: Code-Recipes, Tips, and Tricks for RIA Developers	Noble, Joshua; Anderson, Todd	05/2008	O'Reilly Media, Inc.
ActionScript 3.0 Cookbook: Solutions for Flash Platform and Flex Application Developers	Lott, Joey; Schall, Darron; Peters, Keith	10/2006	O'Reilly Media, Inc.
Flex 4 Cookbook: Real-world recipes for developing Rich Internet Applications	Noble, Joshua; Anderson, Todd; Braithwaite, Garth; Casario, Marco; Tretola, Rich	05/2010	O'Reilly Media, Inc.
Getting Started with Flex 3: An Adobe Developer Library Pocket Guide for Developers	Herrington, Jack D.; Kim, Emily; Team, Adobe Development	06/2008	O'Reilly Media, Inc.
Learning Flex 4: Getting Up to Speed with Rich Internet Application Design and Development	Alaric Cole; Elijah Robison	11/2010	O'Reilly Media, Inc.

title	authors	year	citations	influentialCitations
Building flexible real-time systems using the Flex language	K. Kenny and Kwei-Jay Lin	1991	136	5
Expressing and maintaining timing constraints in FLEX	Kwei-Jay Lin and S. Natarajan	1988	96	0
Flex : A Language for Programming Flexible Real-Time Systems	Kwei-Jay Lin and J. Liu and K. Kenny and S. Natarajan	1991	14	0
Game E-Learning Code Master Dengan Konsep Mmorpg Menggunakan Adobe Flex 3	Fredy Purnomo and Monika Leslivania and D. Daniel and Lisye Mareta Cahya	2010	3	0

FLEX - Grammar language

Books about FLEX on goodreads

Books about FLEX from ISBNdb

Publications about FLEX from Semantic Scholar