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Annotation of 43BSDReno/pgrm/pascal/eyacc/eyacc.1, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1980, 1990 The Regents of the University of California.
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                     18: .\"     @(#)eyacc.1    6.4 (Berkeley) 7/24/90
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                     20: .Dd July 24, 1990
                     21: .Dt EYACC 1
                     22: .Os BSD 4
                     23: .Sh NAME
                     24: .Nm eyacc
                     25: .Nd modified yacc allowing much improved error recovery
                     26: .Sh SYNOPSIS
                     27: .Nm eyacc
                     28: .Op Fl v
                     29: .Op Ar grammar
                     30: .Sh DESCRIPTION
                     31: .Nm Eyacc
                     32: is an old version of
                     33: .Xr yacc  1  ,
                     34: which produces tables used by the Pascal system and its error recovery
                     35: routines.
                     36: .Nm Eyacc
                     37: fully enumerates test actions in its parser when an error token
                     38: is in the look-ahead set.
                     39: This prevents the parser from making undesirable reductions
                     40: when an error occurs before the error is detected.
                     41: The table format is different in
                     42: .Nm eyacc
                     43: than it was in the old
                     44: .Xr yacc 1 ,
                     45: as minor changes had been made for efficiency reasons.
                     46: .Sh SEE ALSO
                     47: .Xr yacc 1
                     48: .br
                     49: .Em Practical LR Error Recovery
                     50: by Susan L.  Graham, Charles B. Haley and W. N. Joy;
                     51: SIGPLAN Conference on Compiler Construction,
                     52: August 1979.
                     53: .Sh HISTORY
                     54: .Nm Eyacc
                     55: appeared in 4.0 BSD.
                     56: .Sh AUTHORS
                     57: S. C. Johnson
                     58: .br
                     59: .Nm Eyacc
                     60: modifications by Charles Haley and William Joy.
                     61: .Sh BUGS
                     62: .Xr Pc 1
                     63: and its error recovery routines should be made into a library
                     64: of routines for the new
                     65: .Xr yacc 1 .

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