* data/glr.c, data/yacc.c: Comment changes.
* data/lalr1.cc (yylex): Use #define to select the name of yylex,
so that one can refer to yylex in the parser file, and have it
renamed, as is the case with other skeletons.
* data/lalr1.cc (debug_): Rename as...
(yydebug_): so that the parser's internals are always in the yy*
pseudo namespace.
Adjust uses.
(b4_parse_param_decl): Remove the leading comma as it is now only
called as unique argument list.
(Parser::Parser): Remove the constructor accepting a location and
an initial debugging level.
Remove from the other ctor the argument for the debugging level.
(debug_level_type, debug_level, set_debug_level): New.
* tests/actions.at, tests/calc.at, tests/regression.at: Adjust
constructor calls.
not 2, since it's not portable to subtract 1 from the start of an
array. The new item 0 is never set or used. All uses changed.
(yyrecoverSyntaxError): Use YYLLOC_DEFAULT instead of assuming
the default definition of YYLLOC_DEFAULT. Problem reported
by Frank Heckenbach.
the normal case and one for the error case. Just use the
first one uniformly. Problem reported by Frank Heckenbach.
(YYLLOC_DEFAULT): Use the conventions of yacc.c, so we can
use exactly the same macro in both places.
(yyerror_range): Now of type yyGLRStackItem, not YYLTYPE,
so that the normal-case YYRHSLOC works for the error case too.
All uses changed.
* data/lalr1.cc (YYSTYPE): Define it as is done for C, instead
of #defining from yystype.
Don't typedef yystype, C++ does not need it.
This lets it possible to forward declare it as union.
* data/lalr1.cc (Parser::yycdebug_): New, a pointer, to allow
changes.
(YYCDEBUG): Adjust.
Use it instead of cdebug_.
(Parser::debug_stream, Parser::set_debug_stream): New.
(Parser::symprint_): Define cdebug_ for temporary backward
compatibility.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Use
debug_stream ().
Introduce another definition to address simple location arrays.
(yyGLRStack): New member: yyerror_range.
(yyrecoverSyntaxError, yyparse): Update it.
(yyrecoverSyntaxError): Use it when shifting the error token to
have an accurate range, equivalent to the one computed by both
yacc.c and lalr1.cc.
* tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): Change its yylex so
that column numbers start at column 0, as per GNU Coding
Standards, the others tests, and the doc.
(_AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_AMBIG_GLR_OUTPUT_WITH_LOC):
Adjust to the above change (first column is 0).
And adjust the location of the "<error>", now covering the whole
line.
whether the reducion was empty or not. This leaves room to
improve the use of YYLLOC_DEFAULT in such a case.
lalr1.cc is still experimental, so changing this is acceptable.
And finally, there are probably not many users who changed the
handling of locations in GLR, so changing is admissible too.
* data/glr.c, data/lalr1.cc, data/yacc.c (YYLLOC_DEFAULT): On an
empty reduction, set @$ to an empty location ending the previously
stacked symbol.
Adjust uses to make sure the code is triggered on empty
reductions.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Adjust the
expected output: empty reductions have empty locations.
"initial push" (corresponding to an hypothetical beginning-of-file).
And let lalr1.cc honor %initial-action.
* doc/bison.texinfo (Initial Action Decl): Clarify, and add an
example.
* data/lalr1.cc (Parser::initlocation_): Remove, bad experiment.
(Parser::Parser): Remove the ctor that used to initialize it.
(Parser::parse): Like in the other skeletons, issue the "starting
parse" message before any action.
Honor %initial-action.
Initialize the stacks with the lookahead.
* data/yacc.c: Let $$ and @$ in %initial-action designate the
look-ahead.
Push them in the stacks.
* tests/actions.at, tests/calc.at: Adjust the C++ ctor invocations.
clearer criterion to define it.
(parse): Initialize the initial location when YYLTYPE_IS_TRIVIAL.
When reducing on an empty RHS, use the latest stacked location as
location.
yylloc is not always available.
* data/glr.c: Likewise.
Also, honor initial-actions.
Define when we know YYLTYPE's structure, i.e., when the default
YYLLOC_DEFAULT is used.
* data/c.m4 (b4_yysymprint_generate): Use it.
* data/lalr1.cc (YYLLOC_DEFAULT): Stop relying on the initial
value of the result.
(error_start_): Replace with...
(error_range_): this location array.
This allows to replace code relying on the implementation of
locations by portable code.
* data/yacc.c (yylerrsp): Replace with...
(yyerror_range): this.
Every time a token is popped, update yyerror_range[0], to have an
accurate location for the error token.
* data/glr.c (YY_LOCATION_PRINT): New.
(yyprocessOneStack): Fix an invocation of YY_SYMBOL_PRINT:
deference a pointer.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): No longer
report the location in %printers.
* src/scan-skel.l: Instead of abort, report error messages to ease
understanding skeleton scanning failures.
(iterator, const_iterator): these, to be more in the C++ spirit.
Also, return reverse iterators so that when displaying the stack
we display its bottom first.
(Parser::stack_print_, Parser::reduce_print_): Match the messages
from yacc.c.
We should probably use vector here though.
* data/yacc.c, data/lalr1.c, data/glr.c: Use YY_SYMBOL_PRINT
to report Shifts instead of ad hoc YYDPRINTF invocations,
including for the error token.
* data/lalr1.cc (symprint_): Output the location.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): In C++, don't
output the location within the %printer.
Activate GLR tests, at least to make sure they compile properly.
They still don't pass though.
* tests/calc.at: Adjust expect verbose output, since now "Entering
state..." is on a different line than the "Shifting" message.
argument, an informative message.
Call YY_SYMBOL_PRINT.
Adjust all callers: integrate the associated YY_SYMBOL_PRINT.
* data/lalr1.cc (destruct_): Likewise.
In addition, no longer depend on b4_yysymprint_generate and
b4_yydestruct_generate to generate these functions, do it "by
hand".
invoked, yydestruct the lookahead.
* tests/calc.at (Calculator $1): Update the expected lengths of
traces: there is an added line for the discarded lookahead.
* doc/bison.texinfo (Destructor Decl): Some rewording.
Define "discarded" symbols.
(YYDSYMPRINTF): Rename as...
(YY_SYMBOL_PRINT): this.
* data/lalr1.cc (YY_SYMBOL_PRINT): New, modeled after the previous
two.
Use it instead of direct symprint_ calls.
(yybackup): Tweak the "Now at end of input" case to match yacc.c's
one.
* data/lalr1.cc (b4_cxx_destruct_def): New macro.
(Parser::stos_): Define unconditionally.
(Parser::destruct_): New method. Generate its body with
b4_yydestruct_generate.
(Parser::error_start_): New attribute.
(Parser::parse) <yyerrlab, yyerrlab1>: Call destruct_ on erroneous
token which are discarded.
(Parser::parse) <yyerrlab, yyerrorlab, yyerrlab1>: Update
error_start_ when erroneous token are discarded.
(Parser::parse) <yyerrlab1>: Compute the location of the error
token so that it covers all the discarded tokens.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Adjust so
it can be called with `%skeleton "lalr1.cc"', and do that.
