projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| c8f7ac22 CH |
1 | August 28, 1977 |
| 2 | ||
| 3 | This directory contains source for a version of yacc needed by the Pascal | |
| 4 | parser. The differences between this yacc and a stadard version 6 yacc | |
| 5 | are indicated in a comment in y1.c. | |
| 6 | ||
| 7 | Note that the standard yacc parser will not work on the tables produced | |
| 8 | by "eyacc" and also that these changes are really useful only with | |
| 9 | a fairly large set of error recovery routines which are part of both | |
| 10 | "pi" and "pxp". The routines are language independent, but the method | |
| 11 | will only work on languages which have some redundancy in them... it is | |
| 12 | probably ill suited for C, but would work fine in ALGOL-60, ALGOL-W, | |
| 13 | EUCLID, LIS, SP/K, PL/1, ALPHARD, CLU, ... | |
| 14 | ||
| 15 | I am working on a short document describing the internals of the error | |
| 16 | recovery technique used in "pi"... It is a simple modification of the | |
| 17 | Graham/Rhodes technique described in a recent article in the CACM. | |
| 18 | ||
| 19 | ||
| 20 | Bill Joy | |
| 21 | Computer Science Division | |
| 22 | EECS Department | |
| 23 | University of California, Berkeley | |
| 24 | Berkeley, California 94704 | |
| 25 | ||
| 26 | Office: (415) 642-4948 | |
| 27 | Home: (415) 524-4510 |