There is now a pseudo variable @$ (readble and writable), location
of the lhs of the rule (by default ranging from the location of
the first symbol of the rhs, to the location of the last symbol,
or, if the rhs is empty, YYLLOC).
* src/bison.s1 [YYLSP_NEEDED] (yyloc): New variable, twin of
yyval.
(yyparse): When providing a default semantic action, provide a
default location action.
(after the $): No longer change `*YYLSP', just stack YYLOC the
same way you stack YYVAL.
* src/reader.c (read_declarations): Use warns.
(copy_guard, case '@'): Also recognize `@$', expanded as `YYLOC'.
(copy_action, case '@'): Likewise.
Use a standard error message, to save useless work from
translators.
(readgram): Use `#if 0' around code that accepted %command
inside grammar rules: The documentation doesn't allow it,
and it will fail since the %command processors scan for the next %.
(parse_token_decl): Extended the %token
declaration to allow a multi-character symbol as an alias.
(parse_thong_decl): New function.
(read_declarations): Added %thong declarations.
(read_declarations): Handle NOOP to deal with allowing
% declarations as another means to specify the flags.
(readgram): Allow %prec prior to semantics embedded in a rule.
(skip_to_char, read_declarations, copy_definition)
(parse_token_decl, parse_start_decl, parse_type_decl)
(parse_assoc_decl, parse_union_decl, parse_expect_decl)
(get_type_name, copy_guard, copy_action, readgram)
(get_type, packsymbols): Revised most error messages.
Changed `fatal' to `warnxxx' to avoid aborting for error.
Revised and use multiple warnxxx functions to avoid using VARARGS1.
(read_declarations): Improve the error message for
an invalid character. Do not abort.
(read_declarations, copy_guard, copy_action): Use
printable_version to avoid unprintable characters in printed output.
(parse_expect_decl): Error if argument to %expect exceeds 10 digits.
(parse_token_decl, parse_assoc_decl, parse_type_decl, get_type):
Allow the type of a non-terminal can be given
more than once, as long as all specifications give the same type.
