projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| e3758c96 C |
1 | .TH EYACC 1 |
| 2 | .UC 4 | |
| 3 | .SH NAME | |
| 4 | eyacc \- modified yacc allowing much improved error recovery | |
| 5 | .SH SYNOPSIS | |
| 6 | .B eyacc | |
| 7 | [ | |
| 8 | .B \-v | |
| 9 | ] | |
| 10 | [ grammar ] | |
| 11 | .SH DESCRIPTION | |
| 12 | .I Eyacc | |
| 13 | is an old version of | |
| 14 | .IR yacc (1), | |
| 15 | which produces tables used by the Pascal system and its error recovery | |
| 16 | routines. | |
| 17 | .I Eyacc | |
| 18 | fully enumerates test actions in its parser when an error token | |
| 19 | is in the look-ahead set. | |
| 20 | This prevents the parser from making undesirable reductions | |
| 21 | when an error occurs before the error is detected. | |
| 22 | The table format is different in | |
| 23 | .I eyacc | |
| 24 | than it was in the old | |
| 25 | .I yacc, | |
| 26 | as minor changes had been made for efficiency reasons. | |
| 27 | .SH "SEE ALSO" | |
| 28 | yacc(1) | |
| 29 | .br | |
| 30 | ``Practical LR Error Recovery'' by Susan L. Graham, Charles B. Haley | |
| 31 | and W. N. Joy; SIGPLAN Conference on Compiler Construction, August 1979. | |
| 32 | .SH AUTHOR | |
| 33 | S. C. Johnson | |
| 34 | .PP | |
| 35 | .I Eyacc | |
| 36 | modifications by Charles Haley and William Joy. | |
| 37 | .SH BUGS | |
| 38 | .I Pc | |
| 39 | and its error recovery routines should be made into a library | |
| 40 | of routines for the new | |
| 41 | .I yacc. |