In `rhs[name]: "a" | "b"', do not free "name" twice.
Reported by Tys Lefering.
<http://lists.gnu.org/archive/html/bug-bison/2010-06/msg00002.html>
* src/named-ref.h, src/named-ref.c (named_ref_copy): New.
* src/parse-gram.y (current_lhs): Rename as...
(current_lhs_symbol): this.
(current_lhs): New function. Use it to free the current lhs
named reference.
* src/reader.c: Bind lhs to a copy of the current named reference.
* src/symlist.c: Rely on free (0) being valid.
* tests/named-refs.at: Test this.
* src/named-ref.h: Add comments.
* src/parse-gram.y: Readability and style changes.
* src/reader.c: Factoring: assign_named_ref function.
* src/scan-code.l: Factoring and style changes. Rename
parse_named_ref to parse_ref. Use "c-ctype.h" from gnulib.
Use "unsigned" type for variant index. Improve readablity.
* src/scan-gram.l: Change error messages and add comments.
* src/symlist.h: symbol_list_null: New function decl.
* src/symlist.c: symbol_list_null: Implement here.
* tests/named-refs.at: Adjust for new error messages.
Discussed in:
http://lists.gnu.org/archive/html/bison-patches/2009-01/msg00000.htmlhttp://lists.gnu.org/archive/html/bison-patches/2009-02/msg00002.htmlhttp://lists.gnu.org/archive/html/bison-patches/2009-03/msg00009.html
* src/parse-gram.y: Add new syntax (named_ref.opt).
* src/reader.c: Store named refs in symbol lists.
* src/reader.h: New argument for symbol_append and
action_append functions.
* src/scan-code.h: Add new field (named_ref) into
code_props data structure. Keeps named ref of midrule
actions.
* src/scan-code.l: Support for named refs in semantic
action code. New function 'parse_named_ref'.
* src/scan-gram.l: Support bracketed id.
* src/symlist.c: Store named refs in symbol lists.
* src/symlist.h: New field in symbol list: named_ref.
* src/named-ref.h: New file, a struct for named_ref.
* src/named-ref.c: New file, named_ref_new function.
* src/Makefile.am: Add two new files.
* tests/testsuite.at: Include new test group:
* tests/named-refs.at: this new file.
