diff options
| -rw-r--r-- | usr.bin/yacc/ACKNOWLEDGEMENTS | 25 | ||||
| -rw-r--r-- | usr.bin/yacc/NEW_FEATURES | 46 | ||||
| -rw-r--r-- | usr.bin/yacc/NOTES | 9 | ||||
| -rw-r--r-- | usr.bin/yacc/NO_WARRANTY | 3 | ||||
| -rw-r--r-- | usr.bin/yacc/README | 23 | ||||
| -rw-r--r-- | usr.bin/yacc/yacc.1 | 41 |
6 files changed, 39 insertions, 108 deletions
diff --git a/usr.bin/yacc/ACKNOWLEDGEMENTS b/usr.bin/yacc/ACKNOWLEDGEMENTS deleted file mode 100644 index b66bb250645..00000000000 --- a/usr.bin/yacc/ACKNOWLEDGEMENTS +++ /dev/null @@ -1,25 +0,0 @@ - Berkeley Yacc owes much to the unflagging efforts of Keith Bostic. -His badgering kept me working on it long after I was ready to quit. - - Berkeley Yacc is based on the excellent algorithm for computing LALR(1) -lookaheads developed by Tom Pennello and Frank DeRemer. The algorithm is -described in their almost impenetrable article in TOPLAS 4,4. - - Finally, much of the credit for the latest version must go to those -who pointed out deficiencies of my earlier releases. Among the most -prolific contributors were - - Benson I. Margulies - Dave Gentzel - Antoine Verheijen - Peter S. Housel - Dale Smith - Ozan Yigit - John Campbell - Bill Sommerfeld - Paul Hilfinger - Gary Bridgewater - Dave Bakken - Dan Lanciani - Richard Sargent - Parag Patel diff --git a/usr.bin/yacc/NEW_FEATURES b/usr.bin/yacc/NEW_FEATURES deleted file mode 100644 index b030c625b00..00000000000 --- a/usr.bin/yacc/NEW_FEATURES +++ /dev/null @@ -1,46 +0,0 @@ - The -r option has been implemented. The -r option tells Yacc to -put the read-only tables in y.tab.c and the code and variables in -y.code.c. Keith Bostic asked for this option so that :yyfix could be -eliminated. - - The -l and -t options have been implemented. The -l option tells -Yacc not to include #line directives in the code it produces. The -t -option causes debugging code to be included in the compiled parser. - - The code for error recovery has been changed to implement the same -algorithm as AT&T Yacc. There will still be differences in the way -error recovery works because AT&T Yacc uses more default reductions -than Berkeley Yacc. - - The environment variable TMPDIR determines the directory where -temporary files will be created. If TMPDIR is defined, temporary files -will be created in the directory whose pathname is the value of TMPDIR. -By default, temporary files are created in /tmp. - - The keywords are now case-insensitive. For example, %nonassoc, -%NONASSOC, %NonAssoc, and %nOnAsSoC are all equivalent. - - Commas and semicolons that are not part of C code are treated as -commentary. - - Line-end comments, as in BCPL, are permitted. Line-end comments -begin with // and end at the next end-of-line. Line-end comments are -permitted in C code; they are converted to C comments on output. - - The form of y.output files has been changed to look more like -those produced by AT&T Yacc. - - A new kind of declaration has been added. The form of the declaration -is - - %ident string - -where string is a sequence of characters begining with a double quote -and ending with either a double quote or the next end-of-line, whichever -comes first. The declaration will cause a #ident directive to be written -near the start of the output file. - - If a parser has been compiled with debugging code, that code can be -enabled by setting an environment variable. If the environment variable -YYDEBUG is set to 0, debugging output is suppressed. If it is set to 1, -debugging output is written to standard output. diff --git a/usr.bin/yacc/NOTES b/usr.bin/yacc/NOTES deleted file mode 100644 index 9db3c96ce1b..00000000000 --- a/usr.bin/yacc/NOTES +++ /dev/null @@ -1,9 +0,0 @@ -Berkeley Yacc reflects its origins. The reason so many routines -use exactly six register variables is that Berkeley Yacc was -developed on a VAX using PCC. PCC placed at most six variables -in registers. I went to considerable effort to find which six -variables most belonged in registers. Changes in machines and -compilers make that effort worthless, perhaps even harmful. - -The code contains many instances where address calculations are -performed in particular ways to optimize the code for the VAX. diff --git a/usr.bin/yacc/NO_WARRANTY b/usr.bin/yacc/NO_WARRANTY deleted file mode 100644 index 06e8d93a2c5..00000000000 --- a/usr.bin/yacc/NO_WARRANTY +++ /dev/null @@ -1,3 +0,0 @@ - Berkeley Yacc is distributed with no warranty whatever. The author -and any other contributors take no responsibility for the consequences of -its use. diff --git a/usr.bin/yacc/README b/usr.bin/yacc/README deleted file mode 100644 index 091f2334361..00000000000 --- a/usr.bin/yacc/README +++ /dev/null @@ -1,23 +0,0 @@ - Berkeley Yacc is an LALR(1) parser generator. Berkeley Yacc has been made -as compatible as possible with AT&T Yacc. Berkeley Yacc can accept any input -specification that conforms to the AT&T Yacc documentation. Specifications -that take advantage of undocumented features of AT&T Yacc will probably be -rejected. - - Berkeley Yacc is distributed with no warranty whatever. The code is certain -to contain errors. Neither the author nor any contributor takes responsibility -for any consequences of its use. - - Berkeley Yacc is in the public domain. The data structures and algorithms -used in Berkeley Yacc are all either taken from documents available to the -general public or are inventions of the author. Anyone may freely distribute -source or binary forms of Berkeley Yacc whether unchanged or modified. -Distributers may charge whatever fees they can obtain for Berkeley Yacc. -Programs generated by Berkeley Yacc may be distributed freely. - - Please report bugs to - - robert.corbett@eng.Sun.COM - -Include a small example if possible. Please include the banner string from -skeleton.c with the bug report. Do not expect rapid responses. diff --git a/usr.bin/yacc/yacc.1 b/usr.bin/yacc/yacc.1 index 97c1f2979cc..4f6ea472d12 100644 --- a/usr.bin/yacc/yacc.1 +++ b/usr.bin/yacc/yacc.1 @@ -1,4 +1,4 @@ -.\" $OpenBSD: yacc.1,v 1.22 2009/02/10 19:24:17 jmc Exp $ +.\" $OpenBSD: yacc.1,v 1.23 2010/07/20 12:53:43 jmc Exp $ .\" .\" Copyright (c) 1989, 1990 The Regents of the University of California. .\" All rights reserved. @@ -32,7 +32,7 @@ .\" .\" from: @(#)yacc.1 5.7 (Berkeley) 7/30/91 .\" -.Dd $Mdocdate: February 10 2009 $ +.Dd $Mdocdate: July 20 2010 $ .Dt YACC 1 .Os .Sh NAME @@ -135,6 +135,8 @@ option causes a human-readable description of the generated parser to be written to the file .Pa y.output . .El +.Pp +.Ex -std yacc .Sh ENVIRONMENT .Bl -tag -width TMPDIR .It Ev TMPDIR @@ -194,3 +196,38 @@ though its presence is optional. The flags .Op Fl or are extensions to that specification. +.Sh HISTORY +Berkeley Yacc was originally developed using PCC on a VAX with the +intent of being as compatible as possible with AT&T Yacc. +Much is owed to the unflagging efforts of Keith Bostic. +His badgering kept me working on Yacc long after I was ready to +quit. +.Pp +Berkeley Yacc is based on the excellent algorithm for computing +LALR(1) lookaheads developed by Tom Pennello and Frank DeRemer. +The algorithm is described in their almost impenetrable article in +TOPLAS 4,4. +.Pp +Finally, much credit must go to those who pointed out deficiencies +of earlier releases. +Among the most prolific contributors were +Benson I. Margulies, +Dave Gentzel, +Antoine Verheijen, +Peter S. Housel, +Dale Smith, +Ozan Yigit, +John Campbell, +Bill Sommerfeld, +Paul Hilfinger, +Gary Bridgewater, +Dave Bakken, +Dan Lanciani, +Richard Sargent, +and +Parag Patel. +.Sh AUTHORS +The +.Nm +utility was written by +.An Robert Corbett . |