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Accept a token number in a %left, %right, or %nonassoc for POSIX

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conformance.  Reported by Tim Josling at
<http://lists.gnu.org/archive/html/bug-bison/2008-01/msg00010.html>.
* NEWS (2.3a+): Mention.
* doc/bison.texinfo (Precedence Decl): Describe how literal strings
and code numbers are treated by precedence declarations.
* src/parse-gram.y (precedence_declaration): Use symbols.prec instead
of symbols.1.
(symbols.prec): New, just like symbols.1 but uses symbol.prec instead
of symbol.
(symbol.prec): New, just like symbol but allows INT.
* src/symtab.c (symbol_user_token_number_set): Remove an aver that no
longer holds.
* tests/regression.at (Token number in precedence declaration): New
test case.
This commit is contained in:
Joel E. Denny
2008-02-17 00:18:36 +00:00
parent 80d2c3adcc
commit ab7f29f8f9
7 changed files with 365 additions and 225 deletions
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@@ -154,6 +154,10 @@ Changes in version 2.3a+ (????-??-??):
See the section `Freeing Discarded Symbols' in the Bison manual for further
details.
* %left, %right, and %nonassoc can now declare token numbers. This is required
by POSIX. However, see the end of section `Operator Precedence' in the Bison
manual for a caveat concerning the treatment of literal strings.
Changes in version 2.3a, 2006-09-13:
* Instead of %union, you can define and use your own union type
@@ -978,7 +982,7 @@ End:
-----
Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2004, 2005, 2006, 2007 Free Software Foundation, Inc.
2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.