Because useless nonterminals are now kept alive (instead of being

[bison.git] / ChangeLog

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+2001-12-05  Akim Demaille  <akim@epita.fr>
+
+       Because useless nonterminals are now kept alive (instead of being
+       `destroyed'), we now sometimes examine them, and store information
+       related to them.  Hence we need to know their number, and adjust
+       memory allocations.
+
+       * src/reduce.c, src/reduce.h (nuseless_nonterminals): No longer
+       static.
+       * src/LR0.c (allocate_itemsets): The memory allocated to
+       `symbol_count' was used for two different purpose: once to count
+       the number of occurrences of each symbol, and later reassigned to
+       `shift_symbol', containing the symbol that can be shifted from a
+       given state.
+       Deobfuscate, i.e., allocate, use and free `symbol_count' here
+       only, and...
+       (new_itemsets): Allocate `shift_symbol' here.
+       (allocate_itemsets): symbol_count includes useless nonterminals.
+       Make room for them.
+       (free_storage): Use `free', not `XFREE', for pointers that cannot
+       be null.
+
+       
 2001-12-05  Akim Demaille  <akim@epita.fr>
 
        * src/nullable.c (set_nullable): Deobfuscate the handling of