* NEWS (2.3a+): Mention it in the entry for unreachable state removal.
* doc/bison.texinfo (Decl Summary): Mention it in the %define entry.
* src/main.c (main): Implement it.
* tests/conflicts.at (Unreachable States After Conflict Resolution):
Extend to test it, and fix a typo.
* doc/bison.texinfo (Understanding): Remove a bogus lookahead set in
the example .output text.
* tests/regression.at (Extra lookahead sets in report): Improve wording
of comments.
(Option Cross Key): Likewise.
* src/print-xml.c (print_core): Don't print a reduction's lookahead set
next to an item whose dot is not at the end of the RHS even if it
happens to be associated with the same rule.
* src/print.c (print_core): Likewise.
* tests/conflicts.at (Unresolved SR Conflicts): Update output.
(Resolved SR Conflicts): Update output.
* tests/regression.at (Extra lookahead sets in report): New test case.
<http://lists.gnu.org/archive/html/help-bison/2007-09/msg00016.html>.
* data/c++.m4: (b4_namespace_ref, b4_namespace_open,
b4_namespace_close): New macros that interpret the %define variable
"namespace" so its value can contain "::" to indicate nested
namespaces.
* data/glr.cc (b4_namespace): Don't define, and replace all uses with
the above macros.
* data/lalr1.cc (b4_namespace): Likewise.
* data/location.cc (b4_namespace): Likewise.
* doc/bison.texinfo (Decl Summary): Move `%define push_pull' entry
inside a new table in the general %define entry. Document `%define
namespace' there as well. Point the %name-prefix entry to it since it
explains it more completely in the case of C++.
(C++ Bison Interface): Mention `%define namespace' instead of
%name-prefix.
(Table of Symbols): Remove the `%define push_pull' entry. The %define
entry suffices.
* tests/c++.at (Relative namespace references): New test case.
(Absolute namespace references): New test case.
(Syntactically invalid namespace references): New test case.
* tests/input.at (C++ namespace reference errors): New test case.
`%define push_pull "push"' and `%define push_pull "both"'.
`%define push_pull "pull"' is the default.
* doc/bison.texinfo (Push Decl, Push Parser Function,
Pull Parser Function, Parser Create Function, Parser Delete Function):
Update declarations.
(Decl Summary, Table of Symbols): Replace %push-parser and
%push-pull-parser entries with a %define push_pull entry.
* data/bison.m4 (b4_percent_define_check_values): New macro.
(b4_pull_if, b4_push_if, b4_use_push_for_pull_if): Move these
definitions...
* data/c.m4 (b4_identification): ... and the YYPUSH and YYPULL cpp
definitions...
* data/push.c: ... to here and compute them from the value of the
%define variable push_pull.
* data/c-skel.m4: Instead of choosing the push.c skeleton for push
parsing requests here...
* data/yacc.c: ... hack this to switch to push.c any time
b4_use_push_pull_flag or the %define variable push_pull is set. This
will go away when we mv push.c yacc.c.
* data/c++-skel.m4, data/glr.c, data/java-skel.m4: Don't report that
push parsing is not supported since unused %define variables are
reported anyway.
* src/getargs.c, src/getargs.h (pull_parser, push_parser): Remove.
* src/muscle_tab.h (muscle_percent_define_check_values): Update
comments for consistency with b4_percent_define_check_values.
* src/output.c (prepare): Don't insert b4_pull_flag and b4_push_flag
muscles.
* src/parse-gram.y (PERCENT_PUSH_PARSER, PERCENT_PUSH_PULL_PARSER):
Remove.
(prologue_declaration): Remove %push-parser and %push-pull-parser
rules.
* src/scan-gram.l (%push-parser, %push-pull-parser): Remove rules.
* tests/calc.at: Update declarations.
* tests/input.at (%define enum variables): New test case.
* tests/push.at (Push Parsing: Memory Leak for Early Deletion): Update
declaration.
(Push Parsing: Multiple impure instances): Update declaration.
(Push Parsing: Unsupported Skeletons): New test case.
* tests/torture.at (Exploding the Stack Size with Alloca): Update
declaration.
(Exploding the Stack Size with Malloc): Update declaration.
Declaration Summary' from the manual now since the %code summary has
moved there.
* doc/bison.texinfo (Prologue Alternatives): Mention that directives
in the rules section must be terminated by semicolons.
* data/java.m4 (b4_single_class_if): Remove.
(b4_abstract_if): Look at "%define abstract".
(b4_lexer_if): New.
(b4_union_name): Rename...
(b4_yystype): ... to this. Map to "%define stype".
(b4_rhs_value, b4_parse_param_decl, b4_lex_param_decl,
b4_maybe_throws): Fix quoting.
(b4_lex_param_call): Move below to keep b4_*_param_decl close.
* data/lalr1.java (Lexer interface): Always define.
(Lexer interface within parser class): Remove.
(YYLexer class): New, used when "%code lexer" is present.
(constructor): When "%code lexer" is used, pass %lex-param
to the lexer constructor.
(yylex, yyparse): Remove %lex-param from method invocations
(YYStack, yyaction, yyparse): Rename b4_union_name to b4_yystype.
* doc/bison.texinfo (Java Bison Interface): Mention "%define
abstract". Rename "%define union_name" to "%define stype".
Rename method names according to previous patch.
(Java Scanner Interface): Describe "%code lexer" instead of
"%pure-parser" and "%define single_class".
(Java Differences): Mention "%code lexer".
* tests/java.at (_AT_DATA_JAVA_CALC_Y): Remove final argument.
Include scanner here, using macros from tests/local.at.
(AT_DATA_CALC_Y): Remove final argument.
(_AT_CHECK_JAVA_CALC): Likewise.
(AT_CHECK_JAVA_CALC): Likewise. Test all four combinations
of %locations and %error-verbose.
(main): Test with and without %lex-param.
* tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Push AT_LEXPARAM_IF.
(AT_BISON_OPTION_POPDEFS): Pop it.
* data/bison.m4 (b4_percent_define_flag_if): Correct comments on how
values are interpreted.
* doc/bison.texinfo (Decl Summary): Clean up and extend %define
documentation a little more.
* src/muscle_tab.c (MUSCLE_USER_NAME_CONVERT,
muscle_percent_define_insert, muscle_percent_code_grow): New
functions/macros.
* src/muscle_tab.h (muscle_percent_define_insert,
muscle_percent_code_grow): Prototype.
* src/parse-gram.y (prologue_declaration): Use
muscle_percent_define_insert and muscle_percent_code_grow when parsing
%define and %code directives.
Make it easy to share %define boolean variables between the front-end
and back-end. Though not used yet, this will be useful in the future.
* data/bison.m4 (b4_check_user_names): Rewrite comments to talk about
Bison uses of names rather than just skeleton uses of names.
(b4_percent_define_get, b4_percent_define_ifdef): Rename
b4_percent_define_skeleton_variables(VARIABLE) to
b4_percent_define_bison_variables(VARIABLE).
(b4_percent_code_get, b4_percent_code_ifdef): Rename
b4_percent_code_skeleton_qualifiers(QUALIFIER) to
b4_percent_code_bison_qualifiers(QUALIFIER).
(b4_check_user_names_wrap): Update for renames.
* src/muscle_tab.c, src/muscle_tab.h (muscle_percent_define_flag_if,
muscle_percent_define_default): New functions mimicking
b4_percent_define_flag_if and b4_percent_define_default.
For %define variables, report locations for invalid values and
redefinitions.
* data/bison.m4 (b4_percent_define_flag_if): Read
b4_percent_define_loc(VARIABLE) to report the location of an invalid
value for VARIABLE.
(b4_percent_define_default): Save a special location in
b4_percent_define_loc(VARIABLE) in case the default value for VARIABLE
must later be reported as invalid.
* src/muscle_tab.c (muscle_location_grow, muscle_location_decode): New
functions.
(muscle_percent_define_insert): Record the location of VARIABLE in
muscle percent_define_loc(VARIABLE), and use it to report the previous
location for a redefinition.
(muscle_percent_define_flag_if): Update like b4_percent_define_flag_if.
(muscle_percent_define_default): Update like b4_percent_define_default.
(muscle_grow_user_name_list): Rename to...
(muscle_user_name_list_grow): ... this for consistency and use
muscle_location_grow.
* src/muscle_tab.h (muscle_location_grow): Prototype.
* tests/input.at (%define errors): Update expected output.
* tests/skeletons.at (%define boolean variables: invalid skeleton
defaults): New test case.
Sbastien Fricker at
<http://lists.gnu.org/archive/html/bug-bison/2007-02/msg00035.html>.
* THANKS: Add Sbastien Fricker.
* data/glr.c, data/push.c, data/yacc.c (yy_reduce_print): Implement.
* doc/bison.texinfo (Tracing): Make it clearer that YYFPRINTF must
accept a variable number of arguments.
* data/bison.m4 (b4_percent_define_flag_if): Don't treat 0 as false.
Complain if the value does not match empty, "true" or "false".
* data/c++.m4: Adjust default definitions of %define variables.
* data/java.m4: Adjust default definitions of %define variables.
* doc/bison.texinfo (Decl Summary): Adjust the %define entry according
to above behavior.
* tests/input.at (Boolean %define variables): Test new behavior.
* NEWS: Mention java.
* TODO: Remove things that are done.
* bootstrap.conf: Add javacomp-script and javaexec-script.
* configure.ac: Invoke gt_JAVACOMP and gt_JAVAEXEC.
* data/Makefile.am: Add new files.
* data/java-skel.m4: New.
* data/java.m4: New.
* data/lalr1.java: New.
* doc/bison.texinfo: Put "A Complete C++ Example" under
C++ Parsers. Add Java Parsers. Put C++ Parsers and Java Parsers
under Other Languages.
* src/getargs.c (valid_languages): Add Java.
* src/getargs.h (struct bison_language): Update size of string fields.
* tests/Makefile.am: Add java.at.
* tests/atlocal.in: Add CONF_JAVA and CONF_JAVAC.
* tests/java.at: New.
* tests/testsuite.at: Include it.
node names: say "Table of Symbols" not "Bison Symbols", and say "Decl
Summary" not "Directives".
* doc/bison.texinfo (Decl Summary, Calc++ Parser): Cross-reference the
%code entry in "Decl Summary" rather than the one in "Table of Symbols"
since the former is now the more complete one.
(Prologue Alternatives): Likewise and do the same for %defines.
(Table of Symbols): Add summary of %code, add summary of %define, and
move full %code documentation to...
(Decl Summary): ... here for consistency with other entries in these
sections.
Move %define entry in order to keep this list alphabetized.
Reword %define entry a little to put less emphasis on the skeleton
concept, which most users shouldn't have to think about.
Discussed starting at
<http://lists.gnu.org/archive/html/bison-patches/2006-12/msg00071.html>.
* doc/bison.texinfo (Decl Summary): Document in %skeleton entry.
(Bison Options): Document in --skeleton entry.
* src/output.c (output_skeleton): Use strncpy rather than strcpy since
full_skeleton can't necessarily hold all of pkgdatadir.
If the specified skeleton file name contains a `/', don't prepend
pkgdatadir.
* src/parse-gram.y (prologue_declaration): If the specified skeleton
file name contains a `/', prepend the grammar file directory.
* tests/Makefile.am (TESTSUITE_AT): Add skeletons.at.
* skeletons.at: New file.
(relative skeleton file names): New test case.
(installed skeleton file names): New test case.
* tests/testsuite.at: Include skeletons.at.
* bootstrap: Update copyright to 2007.
error code.
(Calc++ Scanner): Exit with failure if we can't open the input
file.
Accept "-" standing for stdin.
(Calc++ Top Level): Print the result only if the parsing was
successful.
qualifiers in %code directives, and restrict the characters that are
allowed in them to M4-friendly ones. For %define, continue to support
the quoted form as a deprecated feature. Discussed starting at
<http://lists.gnu.org/archive/html/bison-patches/2007-01/msg00023.html>.
* NEWS (2.3a+): Add entry for the change to %define. Update entry for
%code.
* doc/bison.texinfo (Prologue Alternatives): Update.
(Bison Declaration Summary): In %defines entry, update mention of
`%code requires' and `%code provides'.
(C++ Location Values): Update %define uses.
(Calc++ Parser Interface): Likewise.
(Calc++ Parser): Likewise, and update `%code requires' uses.
(Bison Symbols): Update %code documentation.
* src/parse-gram.y (prologue_declaration): For %define variables, use
`variable' instead of `STRING'.
(grammar_declaration): For %code qualifiers, use `ID' instead of
`STRING'.
(variable): New nonterminal that takes an `ID' or a `STRING'.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Update %code
and %define uses.
* tests/calc.at (_AT_DATA_CALC_Y): Update %define use.
* tests/input.at (Reject unused %code qualifiers): Update %code uses.
(%define errors): Update %define uses.
%provides, and %code-top) into a single %code directive with an
optional qualifier field. Discussed at
<http://lists.gnu.org/archive/html/bison-patches/2007-01/msg00012.html>.
* NEWS (2.3a+): Rewrite the existing entry for the prologue
alternatives.
* doc/bison.texinfo (Prologue Alternatives): Update.
(Decl Summary): Update to %code "requires" and %code "provides".
(Calc++ Parser): Update to %code "requires".
(Bison Symbols): Remove entries for %requires, %provides, and
%code-top. Rewrite %code entry, and add a %code "QUALIFIER" entry.
* data/bison.m4 (b4_user_provides, b4_user_requires): Remove as these
are replaced by b4_percent_code_provides and b4_percent_code_requires,
which are skeleton-specific.
(b4_check_percent_code_qualifiers): New. A skeleton can use this to
declare what %code qualifiers it supports and to complain if any other
qualifiers were used in the grammar.
* data/glr.cc: Update to use b4_user_code([b4_percent_code_requires])
and b4_user_code([b4_percent_code_provides]) in place of
b4_user_requires and b4_user_provides.
* data/glr.c, data/lalr1.cc, data/push.c, data/yacc.c: Likewise.
Add b4_user_code([b4_percent_code_top]) and
b4_user_code([b4_percent_code]).
Invoke b4_check_percent_code_qualifiers.
* src/parse-gram.y (PERCENT_CODE_TOP, PERCENT_PROVIDES,
PERCENT_REQUIRES): Remove.
(grammar_declaration): Remove RHS's for %code-top, %provides, and
%requires. Rewrite the %code RHS as the unqualified form defining the
muscle b4_percent_code. Add another RHS for the qualified %code form,
which defines muscles of the form b4_percent_code_QUALIFIER and the
b4_used_percent_code_qualifiers muscle.
* src/scan-gram.l (PERCENT_CODE_TOP, PERCENT_PROVIDES,
PERCENT_REQUIRES): Remove.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Update to use
%code "requires" and %code "provides".
* tests/input.at (Reject bad %code qualifiers): New.
that the argument is case-insensitive, and there's no `=' here.
For the %skeleton entry, mention that %language is better.
(Bison Options): Likewise for --language and --skeleton. Move the
--skeleton entry so that the `Tuning the parser' section is sorted
alphabetically on long options.
(C++ Bison Interface): Don't use the word skeleton. Don't explain the
%language directive in detail here; cross-reference the %language
documentation instead.
(Calc++ Parser): Use `%require "@value{VERSION}"' rather than
`%require "2.3b"' so that the example is always up-to-date.
(Bison Symbols): Add entries for %language and %skeleton.
* examples/extexi (normalize): Instead of replacing every %require
argument with the current Bison version, just substitute for
`@value{VERSION}'. This guarantees that we're testing what actually
appears in the documentation.
* examples/calc++/Makefile.am ($(calc_extracted)): Use `$(VERSION)'
rather than `@VERSION@'.
%printer's as experimental. Don't mention Java yet. Discussed at
<http://lists.gnu.org/archive/html/bison-patches/2006-12/msg00002.html>.
* NEWS (2.3a+): Say they're experimental. Remove any mention of Java.
(2.3a): Annotate this entry to say the old forms of these features were
also experimental.
* doc/bison.texinfo (Prologue Alternatives, Freeing Discarded Symbols,
Bison Symbols): Say they're experimental. Comment out any mention
of Java (we'll want this back eventually).
%file-prefix, %name-prefix, and %output. Discussed at
<http://lists.gnu.org/archive/html/help-bison/2006-09/msg00001.html>.
* NEWS (2.3a+): Mention.
* doc/bison.texinfo (Decl Summary, Bison Symbols): Add entry for new
form of %defines, and remove `=' from entries for %file-prefix,
%name-prefix, and %output.
* src/parse-gram.y (prologue_declaration): Implement.
* tests/calc.at (Simple LALR Calculator, Simple GLR Calculator, Simple
LALR1 C++ Calculator, Simple GLR C++ Calculator): Remove the `=' from
all but one occurrence of %name-prefix.
* tests/headers.at (export YYLTYPE): Remove the `=' from %name-prefix.
* tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Likewise.
* tests/output.at (AT_CHECK_OUTPUT): Remove the `=' from all but one
occurrence of each of %file-prefix and %output. Add check for %defines
with argument.
* tests/reduce.at (Useless Terminals, Useless Nonterminals,
Useless Rules, Reduced Automaton, Underivable Rules, Empty Language):
Remove the `=' from %output.
Discussed starting at
<http://lists.gnu.org/archive/html/bison-patches/2006-09/msg00060.html>.
* NEWS (2.3a+): Mention.
* doc/bison.texinfo (Freeing Discarded Symbols): Document this and the
previous change today related to mid-rules.
(Bison Symbols): Remove %symbol-default and add <*> and <!>.
* src/parser-gram.y (PERCENT_SYMBOL_DEFAULT): Remove.
(TYPE_TAG_ANY): Add as <*>.
(TYPE_TAG_NONE): Add as <!>.
(generic_symlist_item): Remove RHS for %symbol-default and add RHS's
for <*> and <!>.
* src/scan-gram.l (PERCENT_SYMBOL_DEFAULT): Remove.
(TYPE_TAG_ANY, TYPE_TAG_NONE): Add.
* src/symlist.c (symbol_list_default_new): Split into tagged and
tagless versions.
(symbol_list_destructor_set, symbol_list_printer_set): Split
SYMLIST_DEFAULT case into SYMLIST_DEFAULT_TAGGED and
SYMLIST_DEFAULT_TAGLESS.
* src/symlist.h: Update symbol_list_default*_new prototypes.
(symbol_list.content_type): Split enum value SYMLIST_DEFAULT into
SYMLIST_DEFAULT_TAGGED and SYMLIST_DEFAULT_TAGLESS.
* src/symtab.c (default_destructor, default_destructor_location,
default_printer, default_printer_location): Split each into tagged and
tagless versions.
(symbol_destructor_get, symbol_destructor_location_get,
symbol_printer_get, symbol_printer_location_get): Implement tagged
default and tagless default cases.
(default_destructor_set, default_printer_set): Split each into tagged
and tagless versions.
* src/symtab.h: Update prototypes.
* tests/actions.at (Default %printer and %destructor): Rename to...
(Default tagless %printer and %destructor): ... this, and extend.
(Per-type %printer and %destructor): Rename to...
(Default tagged and per-type %printer and %destructor): ... this, and
extend.
(Default %printer and %destructor for user-defined end token): Extend.
(Default %printer and %destructor are not for error or $undefined):
Update.
(Default %printer and %destructor are not for $accept): Update.
(Default %printer and %destructor for mid-rule values): Extend.
* tests/input.at (Default %printer and %destructor redeclared): Extend.
(Unused values with default %destructor): Extend.
* NEWS (2.3a+): Mention the new `Prologue Alternatives' section in the
Bison manual.
* doc/bison.texinfo (Prologue Alternatives): Correct some errors. Add
some text to clarify the relative importance of the new directives and
to show how these directives may be viewed as code labels.
alternative to the pre-prologue. Mentioned at
<http://lists.gnu.org/archive/html/bison-patches/2006-10/msg00063.html>.
Also, let the prologue alternatives appear in the grammar section.
* src/parse-gram.y (PERCENT_CODE_TOP): New token.
(prologue_declaration): Move the existing prologue alternatives to...
(grammar_declaration): ... here and add %code-top.
* src/scan-gram.l (PERCENT_CODE_TOP): New token.
Clean up and extend documentation for the prologue alternatives.
* NEWS (2.3a+): Describe prologue alternatives.
* doc/bison.texinfo (Prologue): Move discussion of prologue
alternatives to...
(Prologue Alternatives): ... this new section, and extend it to discuss
all 4 directives in detail.
(Bison Symbols): Clean up discussion of prologue alternatives and add
%code-top.
before any #includes that we generate, so that feature-test
macros work. Problem reported by Michael Deutschmann in
<http://lists.gnu.org/archive/html/bug-bison/2006-09/msg00004.html>.
* data/lalr1.cc: Likewise.
* doc/bison.texinfo (Prologue): Document that feature-test macros
should be defined before any Bison declarations.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Put defns
that depend on location.hh after, not before, Bison decls, since
we now include location.hh after the first user prologue.
starting at
<http://lists.gnu.org/archive/html/bison-patches/2006-02/msg00064.html>
and
<http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00091.html>.
* NEWS (2.3+): Add a description of this feature to the default
%destructor/%printer description.
* doc/bison.texinfo (Freeing Discarded Symbols): Likewise.
* src/symlist.c (symbol_list_destructor_set, symbol_list_printer_set):
Invoke semantic_type_destructor_set or semantic_type_printer_set when a
list node contains a semantic type.
* src/symtab.c, src/symtab.h: Extend with a table that associates
semantic types with their %destructor's and %printer's.
(semantic_type_from_uniqstr, semantic_type_get,
semantic_type_destructor_set, semantic_type_printer_set): New functions
composing the public interface of that table.
(symbol_destructor_get, symbol_destructor_location_get,
symbol_printer_get, symbol_printer_location_get): If there's no
per-symbol %destructor/%printer, look up the per-type before trying
the default.
* tests/actions.at (Per-type %printer and %destructor): New test case.
* tests/input.at (Default %printer and %destructor redeclared):
Extend to check that multiple occurrences of %symbol-default in a
single %destructor/%printer declaration is an error.
(Per-type %printer and %destructor redeclared, Unused values with
per-type %destructor): New test cases.
%symbol-default instead of an empty symbol list, and start working on
new per-type %destructor/%printer. Discussed at
<http://lists.gnu.org/archive/html/bison-patches/2006-09/msg00007.html>.
* NEWS (2.3+): Add %symbol-default to example.
* bison.texinfo (Freeing Discarded Symbols): Likewise.
(Bison Symbols): Add entry for %symbol-default.
* src/parse-gram.y (PERCENT_SYMBOL_DEFAULT): New token.
(generic_symlist, generic_symlist_item): New nonterminals for creating
a list in which each item is a symbol, semantic type, or
%symbol-default.
(grammar_declaration): Use generic_symlist in %destructor and %printer
declarations instead of symbols.1 or an empty list.
(symbol_declaration, precedence_declaration, symbols.1): Update actions
for changes to symbol_list.
* src/reader.c: Update for changes to symbol_list.
* src/scan-code.l: Likewise.
* src/scan-gram.l: Scan new PERCENT_SYMBOL_DEFAULT token.
* src/symlist.c, src/symlist.h: Extend such that a list node may
represent a semantic type or a %symbol-default in addition to just an
ordinary symbol. Add switched functions for setting %destructor's and
%printer's.
* tests/actions.at, tests/input.at: Add %symbol-default to all default
%destructor/%printer declarations.
isn't a question of whether the user *declares* that symbol (in %token,
for example). It's a question of whether the user by any means
*defines* the symbol at all (by simply using a char token, for
example). $end is defined by Bison whereas any other token with token
number 0 is defined by the user. The error token is always defined by
Bison regardless of whether the user declares it with %token, but we
may one day let the user define error as a nonterminal instead.
* NEWS (2.3+): Say "user-defined" instead of "user-declared".
* doc/bison.texinfo (Freeing Discarded Symbols): Likewise, and document
the meaning of "user-defined".
* tests/actions.at (Default %printer and %destructor for user-declared
end token): Rename to...
(Default %printer and %destructor for user-defined end token): ...
this.
* src/symtab.c (symbol_destructor_get, symbol_printer_get): In the
computation of whether to apply the default, don't maintain a list of
every Bison-defined symbol. Instead, just check for a first character
of '$', which a user symbol cannot have, and check for the error token.
use these for all user-declared grammar symbols for which the user does
not declare a specific %printer/%destructor. Thus, the parser uses it
for token 0 if the user declares it but not if Bison generates it as
$end. Discussed starting at
<http://lists.gnu.org/archive/html/bison-patches/2006-02/msg00064.html>,
<http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00091.html>,
and
<http://lists.gnu.org/archive/html/bison-patches/2006-07/msg00019.html>.
* NEWS (2.3+): Mention.
* doc/bison.texinfo (Actions in Mid-Rule): It's no longer impossible to
declare a %destructor for a mid-rule's semantic value. It's just
impossible to declare one specific to it.
(Freeing Discarded Symbols): Mention that @$ can be used in %destructor
code. Describe default %destructor form.
* src/parse-gram.y (grammar_declaration): Parse default
%printer/%destructor declarations.
* src/output.c (symbol_destructors_output): Use symbol_destructor_get
and symbol_destructor_location_get rather than accessing the destructor
and destructor_location members of struct symbol.
(symbol_printers_output): Likewise but for %printer's.
* src/reader.c (symbol_should_be_used): Likewise but for %destructor's
again.
* src/symtab.c (default_destructor, default_destructor_location,
default_printer, default_printer_location): New static global
variables to record the default %destructor and %printer.
(symbol_destructor_get, symbol_destructor_location_get,
symbol_printer_get, symbol_printer_location_get): New functions to
compute the appropriate %destructor and %printer for a symbol.
(default_destructor_set, default_printer_set): New functions to set the
default %destructor and %printer.
* src/symtab.h: Prototype all those new functions.
* tests/actions.at (Default %printer and %destructor): New test to
check that the right %printer and %destructor are called, that they're
not called for $end, and that $$ and @$ work correctly.
(Default %printer and %destructor for user-declared end token): New
test to check that the default %printer and %destructor are called for
a user-declared end token.
* tests/input.at (Default %printer and %destructor redeclared, Unused
values with default %destructor): New tests to check related grammar
warnings and errors.
YYSTYPE if your grammar contains at least one <type> tag.
Your YYSTYPE need not be a macro; it can be a typedef.
* doc/bison.texinfo (Value Type, Multiple Types, Location Type):
(Union Decl, Decl Summary): Document this.
* data/glr.c (YYSTYPE): Implement this.
* data/glr.cc (YYSTYPE): Likewise.
* data/lalr1.cc (YYSTYPE): Likewise.
* data/yacc.c (YYSTYPE): Likewise.
* src/output.c (prepare): Output tag_seen_flag.
* src/parse-gram.y (declaration, grammar_declaration):
Use 'union_seen' rather than 'typed' to determine whether
%union has been seen, since grammars can now be typed without
%union.
(symbol_declaration, type.opt, symbol_def):
Keep track of whether a tag has been seen.
* src/reader.c (union_seen, tag_seen): New vars.
(typed): remove.
* src/reader.h (union_seen, tag_seen, typed): Likewise.
* src/scan-code.l (untyped_var_seen): New variable.
(handle_action_dollar): Adjust to above changes.
(handle_action_dollar, handle_action_at):
Improve overflow checking for outlandish numbers.
* tests/input.at (AT_CHECK_UNUSED_VALUES): Redo test to
avoid new diagnostics generated by above changes.
* tests/regression.at (YYSTYPE typedef): Add test to check
for type tags without %union.
New, default to 1.
* data/yacc.c, data/glr.c, data/location.cc: Use them.
* NEWS, doc/bison.texinfo: The initial column and line are 1 by
default.
* tests/calc.at: Adjust.
%end-header. Don't use these declarations to separate pre-prologue
blocks from post-prologue blocks. Add new order-independent
declarations %before-header and %after-header as alternatives to the
traditional Yacc pre-prologue and post-prologue blocks. Discussed at
<http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00110.html>.
* NEWS (2.3+): Update for these changes.
* data/glr.c (b4_before_definitions): Update to...
(b4_start_header): ... this.
(b4_after_definitions): Update to...
(b4_end_header): ... this.
* data/glr.cc: Likewise.
* data/lalr1.cc: Likewise.
* data/yacc.c: Likewise.
* doc/bison.texinfo (The prologue): Update names, and replace remaining
prologue blocks with %*-header declarations.
(Calc++ Parser): Likewise.
(Bison Declaration Summary): Update names.
(Bison Symbols): Update description.
* src/parse-gram.y (PERCENT_AFTER_DEFINITIONS): Update to...
(PERCENT_END_HEADER): ... this.
(PERCENT_BEFORE_DEFINITIONS): Update to...
(PERCENT_START_HEADER): ... this.
(PERCENT_AFTER_HEADER, PERCENT_BEFORE_HEADER): New tokens.
(declaration): Update token names and m4 macro names.
When parsing %end-header and %start-header, invoke translate_code
before muscle_code_grow, and no longer set global booleans to remember
whether these declarations have been seen.
Parse new %after-header and %before-header.
* src/reader.c (before_definitions, after_definitions): Remove.
(prologue_augment): Accept a new bool argument to specify whether to
augment the pre-prologue or post-prologue.
* src/reader.h (before_definitions, after_definitions): Remove these
extern's.
(prologue_augment): Add new bool argument.
* src/scan-gram.l (PERCENT_AFTER_DEFINITIONS): Update to...
(PERCENT_END_HEADER): ... this.
(PERCENT_BEFORE_DEFINITIONS): Update to...
(PERCENT_START_HEADER): ... this.
(PERCENT_AFTER_HEADER, PERCENT_BEFORE_HEADER): New tokens.
* tests/actions.at (Printers and Destructors): Update names.
file and the glr.c header and code files, move the pre-prologue before
the token definitions. Add new %before-definitions and
%after-definitions to declare code that will go in both the header file
and code file. Discussed at
<http://lists.gnu.org/archive/html/bison-patches/2005-12/msg00000.html>,
<http://lists.gnu.org/archive/html/bison-patches/2006-01/msg00016.html>,
and
<http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00055.html>.
* NEWS (2.3+): Describe these changes.
* data/glr.c (b4_pre_prologue): Move from within to before...
(b4_shared_declarations): ... this.
Add new b4_before_definitions before b4_token_enums.
Add new b4_after_definitions at the end.
* data/glr.cc (b4_pre_prologue): Replace with...
(b4_before_definitions): ... this in the header file.
(b4_after_definitions): New near the end of the header file.
* data/lalr1.cc (b4_pre_prologue): Move from the header file to the
code file right before including the header file.
(b4_before_definitions): New in the previous position of
b4_pre_prologue in the header file.
(b4_after_definitions): New near the end of the header file.
* data/yacc.c: Clean up some m4 quoting especially in the header file.
(b4_token_enums_defines): In the code file, move to right before
YYSTYPE for consistency with the header file.
(b4_before_definitions): New right before b4_token_enums_defines in
both the header and code file.
(b4_after_definitions): New right after YYLTYPE and yylloc in both the
header and code file.
* doc/bison.texinfo (Prologue): Show use of %before-definitions instead
of prologues for %union dependencies.
(Bison Declaration Summary): In %defines description, mention the
effect of %before-definitions and %after-definitions on the header
file.
(Calc++ Parser): Forward declare driver in a %before-definitions rather
than in the pre-prologue so that make check succeeds.
(Bison Symbols): Add entries for %before-definitions and
%after-definitions.
* src/parse-gram.y (PERCENT_BEFORE_DEFINITIONS): New token for
%before-definitions.
(PERCENT_AFTER_DEFINITIONS): New token for %after-definitions.
(declaration): Parse those declarations and append to
b4_before_definitions and b4_after_definitions, respectively.
* src/reader.c (before_definitions, after_definitions): New bools to
track whether those declarations have been seen.
(prologue_augment): Add to the post-prologue if %union,
%before-definitions, or %after-definitions has been seen.
* src/reader.h (before_definitions, after_definitions): New extern's.
* src/scan-gram.l: Scan the new declarations.
* tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Place the second
prologue block in a %before-definitions or a %after-definitions based
on whether the %union is declared.
* tests/regression.at (Early token definitions with --yacc, Early token
definitions without --yacc): Move tests for token definitions into the
post-prologue since token names are no longer defined in the
pre-prologue.
#define statements unless `--yacc' is specified; always use enum
yytokentype. Most important discussions start at:
<http://lists.gnu.org/archive/html/bison-patches/2005-09/msg00053.html>,
<http://lists.gnu.org/archive/html/bison-patches/2005-12/msg00052.html>,
and
<http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00043.html>.
* NEWS (2.3+): Mention.
* data/c.m4 (b4_yacc_if): New.
(b4_token_enums_defines): Use b4_yacc_if to decide whether to add the
token #define's.
* doc/bison.texinfo (Bison Options): Describe the effect of `--yacc'
on token name definitions.
* src/getargs.c (usage): Capitalize `Yacc' in English.
* src/output.c (prepare): Define b4_yacc_flag.
* tests/regression.at (Early token definitions): Test that tokens names
are defined before the pre-prologue not just before the post-prologue.
Remove this test case and copy to...
(Early token definitions with --yacc): ... this to test #define's.
(Early token definitions without --yacc): ... and this to test enums.
