Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-11 13:23:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

Get rid of yyrhs and yyprhs in yacc.c.

Browse Source 
They were used to get the symbol types, given a rule number,  when
displaying the top of the stack before a reduction.  But the symbol type
is available from the state stack.  This has two be benefits: two tables
less in the parser (making it smaller), and a more consistent use of the
three stacks which will help to fuse them.

	* data/yacc.c (yyprhs, yyrhs): Remove.
	(YY_REDUCE_PRINT): Pass yyssp to yy_reduce_print.
	(yy_reduce_print): Take yyssp as argument.
	Use it, together with yystos, to get the symbol type.
	* tests/regression.at (Web2c Report): Remove these tables from the
	expected output.
This commit is contained in:
Akim Demaille
2008-11-23 08:39:17 +01:00
parent 6ab1adbe1e
commit 68dbdee86a
3 changed files with 28 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
ChangeLog
View File

@@ -1,3 +1,19 @@
2008-11-25 Akim Demaille <demaille@gostai.com>
Get rid of yyrhs and yyprhs in yacc.c.
They were used to get the symbol types, given a rule number, when
displaying the top of the stack before a reduction. But the symbol type
is available from the state stack. This has two be benefits: two tables
less in the parser (making it smaller), and a more consistent use of the
three stacks which will help to fuse them.
* data/yacc.c (yyprhs, yyrhs): Remove.
(YY_REDUCE_PRINT): Pass yyssp to yy_reduce_print.
(yy_reduce_print): Take yyssp as argument.
Use it, together with yystos, to get the symbol type.
* tests/regression.at (Web2c Report): Remove these tables from the
expected output.
2008-11-25 Akim Demaille <demaille@gostai.com>
b4_tables_map.