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Topic: Yacc

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Yet Another Compiler Compiler

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	BtYacc: BackTracking Yacc
		BTYACC -- backtracking yacc =========================== BTYACC was created by Chris Dodd using ideas from many places and lots of code from the Berkeley Yacc distribution, which is a public domain yacc clone put together by the good folks at Berkeley.
		In yacc grammars for C, a standard hack, know as the "lexer feedback hack" is used to find typedef names.
		Anyone who has ever looked at Jim Roskind public domain C++ yacc grammar, or the yacc-based grammar used in g++ knows how difficult this is. BTYACC is very useful for parsing any ambiguous grammar, particularly ones that come from trying to merge two (or more) complete grammars.
	www.siber.com /btyacc (3112 words)

	yacc
		The yacc utility reads a description of a context-free grammar in file and writes C source code, conforming to the ISO C standard, to a code file, and optionally header information into a header file, in the current directory.
		The yacc command accepts a language that is used to define a grammar for a target language to be parsed by the tables and code generated by yacc.
		Default versions of main() and yyerror() are supplied in the yacc library and can be linked in by using the -l y operand to cc or c89.
	www.opengroup.org /onlinepubs/007908799/xcu/yacc.html (5502 words)

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		Yacc turns such a specification into a subroutine that han- dles the input process; frequently, it is convenient and appropriate to have most of the flow of control in the user's application handled by this subroutine.
		Yacc is written in a portable dialect of C[1] and the actions, and output subroutine, are in C as well.
		Yacc permits an action to be written in the middle of a rule as well as at the end.
	www.cs.uaf.edu /~cs631/yacc-docs.txt (11347 words)

	yacc
		The yacc utility shall read a description of a context-free grammar in grammar and write C source code, conforming to the ISO C standard, to a code file, and optionally header information into a header file, in the current directory.
		A parser generated by yacc shall never request an input symbol from yylex() while in a state where the only actions other than the error action are reductions by a single rule.
		Grammar Rules in yacc.) Applications are not required to use this operator for unary operators, but the grammars that do not require it are rare.
	www.opengroup.org /onlinepubs/009695399/utilities/yacc.html (6539 words)

	Differences Between YACC and AnaGram
		Standard YACC is a minimal implementation of an LALR-1 parser generator.
		Not the least of the problems associated with using YACC is the murky interface between a YACC parser and its associated lexical scanner.
		The YACC programmer must declare the parser stack himself, making it a union if necessary, and must use the correct union element whenever he refers to the parser stack.
	www.parsifalsoft.com /yaccdif.html (2530 words)

	Yacc: Yet Another Compiler-Compiler
		Yacc turns such a specification into a subroutine that handles the input process; frequently, it is convenient and appropriate to have most of the flow of control in the user's application handled by this subroutine.
		The Yacc user prepares a specification of the input process; this includes rules describing the input structure, code to be invoked when these rules are recognized, and a low-level routine to do the basic input.
		Yacc owes much to a most stimulating collection of users, who have goaded me beyond my inclination, and frequently beyond my ability, in their endless search for ``one more feature''.
	dinosaur.compilertools.net /yacc/index.html (11084 words)

	Embedded.com - Lex and Yacc for Embedded Programmers
		Lex and yacc are free development tools that help you write software in C or C++ that interprets or transforms structured input.
		Although lex and yacc are generally considered to be UNIX utilities, versions exist for a variety of platforms.
		Yacc grammars however, are usually easy to port between different yacc versions.
	www.embedded.com /story/OEG20030220S0036 (3432 words)

	An introduction to lex and yacc part 1 - The Code Project - C++ / MFC
		Yacc is a tool that receives a stream of tokens from somewhere and imposes structure upon them.
		Yacc defines the data types attaching to each token and defines a union containing all the possible datatypes.
		Yacc and lex become very chummy at this point because yacc defines the data structure and lex performs assignments to the data structure.
	www.codeproject.com /cpp/introlexyacc.asp (3624 words)

	Yacc Yet Another Compiler Compiler by Stephen C. Johnson
		Yacc turns such a specification into a subroutine that handles the input process; fre quently, it is convenient and appropriate to have most of the flow of control in the user's application handled by this subroutine.
		Yacc is written in a portable dialect of C Ritchie Kernighan Language Prentice and the actions, and output subroutine, are in C as well.
		While Yacc cannot handle all possible specifications, its power compares favorably with similar systems; moreover, the constructions which are difficult for Yacc to handle are also frequently difficult for human beings to handle.
	www.cs.utexas.edu /users/novak/yaccpaper.htm (11360 words)

	Bison - GNU parser generator
		Once you are proficient with Bison, you can use it to develop a wide range of language parsers, from those used in simple desk calculators to complex programming languages.
		Bison is upward compatible with Yacc: all properly-written Yacc grammars ought to work with Bison with no change.
		Anyone familiar with Yacc should be able to use Bison with little trouble.
	www.gnu.org /software/bison/bison.html (477 words)

	Lex and YACC primer/HOWTO: YACC
		This clearly describes the relation YACC has with Lex, YACC has no idea what 'input streams' are, it needs preprocessed tokens.
		When YACC saw the light of day, the tool was used to parse input files for compilers: programs.
		It is generated by YACC from the Grammar File we are about to create.
	www.tldp.org /HOWTO/Lex-YACC-HOWTO-4.html (1593 words)

	Jumpstart your Yacc...and Lex too!
		Each Yacc declaration part declares the names of both the terminal and non-terminal symbols (tokens), and may also describe operator precedence and data types for various symbols.
		But like Lex, Yacc also has a set of variables and functions that are available to the user for extending functionality.
		When Yacc compiles a.y file with a _d option, a header file is generated, which has #define for each of the tokens.
	www-106.ibm.com /developerworks/linux/library/l-lex.html?dwzone=linux (2808 words)

	Amazon.com: Lex & Yacc (A Nutshell Handbook): Books: John R Levine,Tony Mason,Doug Brown (Site not responding. Last check: )
		Yacc (yet another compiler compiler) and its companion lex (lexical analyzer) are primarily intended to allow quick and easy development of small special-purpose languages.
		Yacc uses a formal grammar to parse an input stream, something which lex cannot do using simple regular expressions since lex is limited to simple finite state automata.
		In summary, if you've never used lex or yacc before and think they might be useful tools for you, and you already know the C programming language, this is a handy book to have.
	www.amazon.com /Yacc-Nutshell-Handbook-John-Levine/dp/1565920007 (2098 words)

	Yacc - A parser generator
		The Yacc Specification rules are the place where you "glue" the various tokens together that lex has conviniently provided to you.
		Yacc has to check whether it is followed by another string or a newline, before it can decide whether it is being used to introduce a sub-menu within the same file, or an external menu-file.
		Yacc lets us refer to the value of a given token using a syntax similar to that of awk and perl.
	www.luv.asn.au /overheads/lex_yacc/yacc.html (5720 words)

	Linux and UNIX yacc command help
		Short for yet another compiler-compiler, yacc is a compiler.
		Generates the file y.tab.h with the #define statements that associate the yacc user-assigned "token codes" with the user-declared "token names." This association allows source files otherthan y.tab.c to access the token codes.
		Use sym_prefix instead of yy as the prefix for all external names produced by yacc.
	www.computerhope.com /unix/uyacc.htm (432 words)

	Choose from 100
		YACC welcomes Catholics, 21 - 40 years old, single or newly married and without children.
		If you would like to meet a group of really nice peoplefor friendship and fun we welcome you to join us..
		Email YACC for membership forms and sample event schedules
	www.yacconline.org (88 words)

	O'Reilly Media -- Bookstore: lex & yacc, Second Edition
		Major MS-DOS and Unix versions of lex and yacc are explored in depth, including AT&T lex and yacc, Berkeley yacc, Berkeley/GNU Flex, GNU Bison, MKS lex and yacc, and Abraxas PCYACC
		The bits regarding the differences between yacc and flex are especially useful.
		YACC produces #define's out of the tokens and I wrote a C++-wrapper around the parser.
	www.oreilly.com /catalog/lex (1494 words)

	MKS Lex & Yacc
		I've tried the other Yaccs and MKS Lex and Yacc is by far the best on the market, with the best documentation and the neatest technical support people.
		MKS Lex & Yacc simplifies the development of interpretive and analytical software such as customized compilers and parsers.
		Together, the MKS Lexical scanner and MKS Yacc parser generators form a powerful program generation tool which processes any language specification you provide into usable C or C++ code.
	www.mkssoftware.com /products/ly (250 words)

	Lex and YACC primer/HOWTO
		YACC is really amazing when used in combination with Lex, however, the Bison manpage does not describe how to integrate Lex generated code with your Bison program.
		Although Lex and YACC predate C++, it is possible to generate a C++ parser.
		Yacc: Yet Another Compiler-Compiler by Stephen C. Johnson is one of the original reference papers for YACC.
	www.faqs.org /docs/Linux-HOWTO/Lex-YACC-HOWTO.html (4973 words)

	The Roles of Lex and YACC
		The C program created by YACC is basically a state machine that traces through the steps in fulfilling the grammatical rules laid down by the user in the.y file.
		To know which step to take next, YACC repeatedly calls the function that lex created to read input characters until a useful "chunk" is encountered.
		When this chunk is encountered, the lex function puts the actual text that it read into the string yytext and returns to the calling yacc program with a "token" describing what kind of chunk was encountered.
	www.ecst.csuchico.edu /~bhsteel/250/examplesHandout/handout.html (798 words)

	UNIX man pages : yacc () (Site not responding. Last check: )
		Yacc reads the grammar specification in the file filename and generates an LR(1) parser for it.
		The parsers consist of a set of LALR(1) parsing tables and a driver routine written in the C programming language.
		Yacc normally writes the parse tables and the driver routine to the file y.tab.c.
	www.mcsr.olemiss.edu /cgi-bin/man-cgi?yacc (318 words)

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