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Diffstat (limited to 'CHANGES')
| -rw-r--r-- | CHANGES | 21 |
1 files changed, 21 insertions, 0 deletions
@@ -1,5 +1,26 @@ Version 3.5 --------------------- +04/26/12: beazley + Changes to functions available in panic mode error recover. In previous versions + of PLY, the following global functions were available for use in the p_error() rule: + + yacc.errok() # Reset error state + yacc.token() # Get the next token + yacc.restart() # Reset the parsing stack + + The use of global variables was problematic for code involving multiple parsers + and frankly was a poor design overall. These functions have been moved to methods + of the parser instance created by the yacc() function. To make it easier to + obtain an instance of the parser in error handling, it is now passed as an optional + parameter to p_error() like this: + + def p_error(p, parser): + ... + parser.errok() + + *** POTENTIAL INCOMPATIBILITY *** The original global functions now issue a + DeprecationWarning. + 04/19/12: beazley Fixed some problems with line and position tracking and the use of error symbols. If you have a grammar rule involving an error rule like this: |