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Finish implementation of per-type %destructor/%printer. Discussed
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.
This commit is contained in:
Joel E. Denny
29
ChangeLog
29
ChangeLog
@@ -1,3 +1,32 @@
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2006-09-04 Joel E. Denny <jdenny@ces.clemson.edu>
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Finish implementation of per-type %destructor/%printer. Discussed
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starting at
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<http://lists.gnu.org/archive/html/bison-patches/2006-02/msg00064.html>
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and
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<http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00091.html>.
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* NEWS (2.3+): Add a description of this feature to the default
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%destructor/%printer description.
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* doc/bison.texinfo (Freeing Discarded Symbols): Likewise.
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* src/symlist.c (symbol_list_destructor_set, symbol_list_printer_set):
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Invoke semantic_type_destructor_set or semantic_type_printer_set when a
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list node contains a semantic type.
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* src/symtab.c, src/symtab.h: Extend with a table that associates
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semantic types with their %destructor's and %printer's.
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(semantic_type_from_uniqstr, semantic_type_get,
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semantic_type_destructor_set, semantic_type_printer_set): New functions
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composing the public interface of that table.
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(symbol_destructor_get, symbol_destructor_location_get,
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symbol_printer_get, symbol_printer_location_get): If there's no
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per-symbol %destructor/%printer, look up the per-type before trying
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the default.
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* tests/actions.at (Per-type %printer and %destructor): New test case.
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* tests/input.at (Default %printer and %destructor redeclared):
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Extend to check that multiple occurrences of %symbol-default in a
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single %destructor/%printer declaration is an error.
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(Per-type %printer and %destructor redeclared, Unused values with
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per-type %destructor): New test cases.
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2006-09-04 Joel E. Denny <jdenny@ces.clemson.edu>
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Require default %destructor/%printer to be declared using
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15
NEWS
15
NEWS
@@ -12,7 +12,7 @@ Changes in version 2.3+:
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* Locations columns and lines start at 1.
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In accordance with the GNU Coding Standards and Emacs.
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* You may now declare a default %destructor and %printer:
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* You may now declare per-type and default %destructor's and %printer's:
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For example:
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@@ -21,13 +21,18 @@ Changes in version 2.3+:
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%token <string> STRING2
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%type <string> string1
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%type <string> string2
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%union { char character; }
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%token <character> CHR
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%type <character> chr
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%destructor { free ($$); } %symbol-default
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%destructor { free ($$); printf ("%d", @$.first_line); } STRING1 string1
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%destructor { } <character>
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guarantees that, when the parser discards any user-defined symbol, it passes
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its semantic value to `free'. However, when the parser discards a `STRING1'
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or a `string1', it also prints its line number to `stdout'. It performs only
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the second `%destructor' in this case, so it invokes `free' only once.
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guarantees that, when the parser discards any user-defined symbol that has a
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semantic type tag other than `<character>', it passes its semantic value to
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`free'. However, when the parser discards a `STRING1' or a `string1', it
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also prints its line number to `stdout'. It performs only the second
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`%destructor' in this case, so it invokes `free' only once.
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* Except for LALR(1) parsers in C with POSIX Yacc emulation enabled (with `-y',
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`--yacc', or `%yacc'), Bison no longer generates #define statements for
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@@ -4011,19 +4011,24 @@ Within @var{code}, @code{$$} designates the semantic value associated
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with the discarded symbol, and @code{@@$} designates its location.
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The additional parser parameters are also available (@pxref{Parser Function, ,
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The Parser Function @code{yyparse}}).
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When a symbol is listed among @var{symbols}, its @code{%destructor} is called a
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per-symbol @code{%destructor}.
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You may also define a per-type @code{%destructor} by listing a semantic type
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among @var{symbols}.
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In that case, the parser will invoke this @var{code} whenever it discards any
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grammar symbol that has that semantic type unless that symbol has its own
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per-symbol @code{%destructor}.
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Finally, you may define a default @code{%destructor} by placing
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@code{%symbol-default} in the @var{symbols} list of exactly one
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@code{%destructor} declaration in your grammar file.
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In that case, the parser will invoke the associated @var{code} whenever it
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discards any user-defined grammar symbol for which there is no per-type or
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per-symbol @code{%destructor}.
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@end deffn
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@deffn {Directive} %destructor @{ @var{code} @} %symbol-default
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@cindex default %destructor
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@findex %symbol-default
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Invoke the braced @var{code} whenever the parser discards any user-defined
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grammar symbol for which the user has not specifically declared any
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@code{%destructor}.
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This is known as the default @code{%destructor}.
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As in the previous form, @code{$$}, @code{@@$}, and the additional parser
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parameters are available.
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@end deffn
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@noindent
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For instance:
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@smallexample
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@@ -4032,13 +4037,18 @@ For instance:
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%token <string> STRING2
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%type <string> string1
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%type <string> string2
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%union @{ char character; @}
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%token <character> CHR
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%type <character> chr
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%destructor @{ free ($$); @} %symbol-default
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%destructor @{ free ($$); printf ("%d", @@$.first_line); @} STRING1 string1
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%destructor @{ @} <character>
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@end smallexample
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@noindent
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guarantees that, when the parser discards any user-defined symbol, it passes
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its semantic value to @code{free}.
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guarantees that, when the parser discards any user-defined symbol that has a
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semantic type tag other than @code{<character>}, it passes its semantic value
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to @code{free}.
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However, when the parser discards a @code{STRING1} or a @code{string1}, it also
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prints its line number to @code{stdout}.
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It performs only the second @code{%destructor} in this case, so it invokes
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@@ -212,7 +212,8 @@ symbol_list_destructor_set (symbol_list *node, const char *destructor,
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symbol_destructor_set (node->content.sym, destructor, loc);
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break;
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case SYMLIST_TYPE:
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/* FIXME: */
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semantic_type_destructor_set (
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semantic_type_get (node->content.type_name), destructor, loc);
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break;
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case SYMLIST_DEFAULT:
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default_destructor_set (destructor, loc);
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@@ -229,7 +230,8 @@ symbol_list_printer_set (symbol_list *node, const char *printer, location loc)
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symbol_printer_set (node->content.sym, printer, loc);
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break;
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case SYMLIST_TYPE:
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/* FIXME: */
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semantic_type_printer_set (
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semantic_type_get (node->content.type_name), printer, loc);
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break;
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case SYMLIST_DEFAULT:
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default_printer_set (printer, loc);
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178
src/symtab.c
178
src/symtab.c
@@ -83,6 +83,23 @@ symbol_new (uniqstr tag, location loc)
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return res;
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}
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/*----------------------------------------.
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| Create a new semantic type, named TAG. |
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`----------------------------------------*/
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static semantic_type *
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semantic_type_new (uniqstr tag)
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{
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semantic_type *res = xmalloc (sizeof *res);
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uniqstr_assert (tag);
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res->tag = tag;
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res->destructor = NULL;
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res->printer = NULL;
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return res;
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}
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/*-----------------.
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| Print a symbol. |
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@@ -114,12 +131,21 @@ symbol_print (symbol *s, FILE *f)
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`------------------------------------------------------------------*/
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static void
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redeclaration (symbol* s, const char *what, location first, location second)
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symbol_redeclaration (symbol *s, const char *what, location first,
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location second)
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{
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complain_at (second, _("%s redeclaration for %s"), what, s->tag);
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complain_at (first, _("previous declaration"));
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}
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static void
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semantic_type_redeclaration (semantic_type *s, const char *what, location first,
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location second)
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{
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complain_at (second, _("%s redeclaration for <%s>"), what, s->tag);
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complain_at (first, _("previous declaration"));
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}
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/*-----------------------------------------------------------------.
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| Set the TYPE_NAME associated with SYM. Does nothing if passed 0 |
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@@ -132,7 +158,7 @@ symbol_type_set (symbol *sym, uniqstr type_name, location loc)
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if (type_name)
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{
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if (sym->type_name)
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redeclaration (sym, "%type", sym->type_location, loc);
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symbol_redeclaration (sym, "%type", sym->type_location, loc);
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uniqstr_assert (type_name);
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sym->type_name = type_name;
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sym->type_location = loc;
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@@ -150,12 +176,31 @@ symbol_destructor_set (symbol *sym, const char *destructor, location loc)
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if (destructor)
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{
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if (sym->destructor)
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redeclaration (sym, "%destructor", sym->destructor_location, loc);
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symbol_redeclaration (sym, "%destructor", sym->destructor_location,
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loc);
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sym->destructor = destructor;
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sym->destructor_location = loc;
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}
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}
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/*-------------------------------------------------------------------.
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| Set the DESTRUCTOR associated with TYPE. Do nothing if passed 0. |
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`-------------------------------------------------------------------*/
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void
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semantic_type_destructor_set (semantic_type *type, const char *destructor,
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location loc)
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{
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if (destructor)
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{
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if (type->destructor)
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semantic_type_redeclaration (type, "%destructor",
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type->destructor_location, loc);
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type->destructor = destructor;
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type->destructor_location = loc;
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}
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}
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/*---------------------------------------.
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| Get the computed %destructor for SYM. |
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`---------------------------------------*/
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@@ -167,6 +212,14 @@ symbol_destructor_get (symbol *sym)
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if (sym->destructor != NULL)
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return sym->destructor;
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/* Per-type %destructor. */
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if (sym->type_name)
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{
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semantic_type *type = semantic_type_get (sym->type_name);
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if (type->destructor)
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return type->destructor;
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}
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/* Apply the default %destructor only to user-defined symbols. */
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if (sym->tag[0] == '$' || sym == errtoken)
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return NULL;
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@@ -182,6 +235,12 @@ symbol_destructor_location_get (symbol *sym)
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{
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if (sym->destructor != NULL)
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return sym->destructor_location;
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if (sym->type_name)
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{
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semantic_type *type = semantic_type_get (sym->type_name);
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if (type->destructor)
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return type->destructor_location;
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}
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return default_destructor_location;
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}
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@@ -195,12 +254,30 @@ symbol_printer_set (symbol *sym, const char *printer, location loc)
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if (printer)
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{
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if (sym->printer)
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redeclaration (sym, "%printer", sym->printer_location, loc);
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symbol_redeclaration (sym, "%printer", sym->printer_location, loc);
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sym->printer = printer;
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sym->printer_location = loc;
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}
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}
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/*----------------------------------------------------------------.
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| Set the PRINTER associated with TYPE. Do nothing if passed 0. |
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`----------------------------------------------------------------*/
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void
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semantic_type_printer_set (semantic_type *type, const char *printer,
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location loc)
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{
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if (printer)
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{
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if (type->printer)
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semantic_type_redeclaration (type, "%printer", type->printer_location,
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loc);
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type->printer = printer;
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type->printer_location = loc;
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}
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}
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/*------------------------------------.
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| Get the computed %printer for SYM. |
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`------------------------------------*/
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@@ -212,6 +289,14 @@ symbol_printer_get (symbol *sym)
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if (sym->printer != NULL)
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return sym->printer;
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|
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/* Per-type %printer. */
|
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if (sym->type_name)
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{
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semantic_type *type = semantic_type_get (sym->type_name);
|
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if (type->printer)
|
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return type->printer;
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}
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|
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/* Apply the default %printer only to user-defined symbols. */
|
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if (sym->tag[0] == '$' || sym == errtoken)
|
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return NULL;
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@@ -227,6 +312,12 @@ symbol_printer_location_get (symbol *sym)
|
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{
|
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if (sym->printer != NULL)
|
||||
return sym->printer_location;
|
||||
if (sym->type_name)
|
||||
{
|
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semantic_type *type = semantic_type_get (sym->type_name);
|
||||
if (type->printer)
|
||||
return type->printer_location;
|
||||
}
|
||||
return default_printer_location;
|
||||
}
|
||||
|
||||
@@ -242,7 +333,8 @@ symbol_precedence_set (symbol *sym, int prec, assoc a, location loc)
|
||||
if (a != undef_assoc)
|
||||
{
|
||||
if (sym->prec != 0)
|
||||
redeclaration (sym, assoc_to_string (a), sym->prec_location, loc);
|
||||
symbol_redeclaration (sym, assoc_to_string (a), sym->prec_location,
|
||||
loc);
|
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sym->prec = prec;
|
||||
sym->assoc = a;
|
||||
sym->prec_location = loc;
|
||||
@@ -509,14 +601,15 @@ symbol_translation_processor (void *this, void *null ATTRIBUTE_UNUSED)
|
||||
}
|
||||
|
||||
|
||||
/*----------------------.
|
||||
| A symbol hash table. |
|
||||
`----------------------*/
|
||||
/*---------------------------------------.
|
||||
| Symbol and semantic type hash tables. |
|
||||
`---------------------------------------*/
|
||||
|
||||
/* Initial capacity of symbols hash table. */
|
||||
/* Initial capacity of symbol and semantic type hash table. */
|
||||
#define HT_INITIAL_CAPACITY 257
|
||||
|
||||
static struct hash_table *symbol_table = NULL;
|
||||
static struct hash_table *semantic_type_table = NULL;
|
||||
|
||||
static inline bool
|
||||
hash_compare_symbol (const symbol *m1, const symbol *m2)
|
||||
@@ -525,12 +618,25 @@ hash_compare_symbol (const symbol *m1, const symbol *m2)
|
||||
return UNIQSTR_EQ (m1->tag, m2->tag);
|
||||
}
|
||||
|
||||
static inline bool
|
||||
hash_compare_semantic_type (const semantic_type *m1, const semantic_type *m2)
|
||||
{
|
||||
/* Since names are unique, we can compare the pointers themselves. */
|
||||
return UNIQSTR_EQ (m1->tag, m2->tag);
|
||||
}
|
||||
|
||||
static bool
|
||||
hash_symbol_comparator (void const *m1, void const *m2)
|
||||
{
|
||||
return hash_compare_symbol (m1, m2);
|
||||
}
|
||||
|
||||
static bool
|
||||
hash_semantic_type_comparator (void const *m1, void const *m2)
|
||||
{
|
||||
return hash_compare_semantic_type (m1, m2);
|
||||
}
|
||||
|
||||
static inline size_t
|
||||
hash_symbol (const symbol *m, size_t tablesize)
|
||||
{
|
||||
@@ -538,12 +644,24 @@ hash_symbol (const symbol *m, size_t tablesize)
|
||||
return ((uintptr_t) m->tag) % tablesize;
|
||||
}
|
||||
|
||||
static inline size_t
|
||||
hash_semantic_type (const semantic_type *m, size_t tablesize)
|
||||
{
|
||||
/* Since names are unique, we can hash the pointer itself. */
|
||||
return ((uintptr_t) m->tag) % tablesize;
|
||||
}
|
||||
|
||||
static size_t
|
||||
hash_symbol_hasher (void const *m, size_t tablesize)
|
||||
{
|
||||
return hash_symbol (m, tablesize);
|
||||
}
|
||||
|
||||
static size_t
|
||||
hash_semantic_type_hasher (void const *m, size_t tablesize)
|
||||
{
|
||||
return hash_semantic_type (m, tablesize);
|
||||
}
|
||||
|
||||
/*-------------------------------.
|
||||
| Create the symbol hash table. |
|
||||
@@ -557,6 +675,11 @@ symbols_new (void)
|
||||
hash_symbol_hasher,
|
||||
hash_symbol_comparator,
|
||||
free);
|
||||
semantic_type_table = hash_initialize (HT_INITIAL_CAPACITY,
|
||||
NULL,
|
||||
hash_semantic_type_hasher,
|
||||
hash_semantic_type_comparator,
|
||||
free);
|
||||
}
|
||||
|
||||
|
||||
@@ -584,6 +707,30 @@ symbol_from_uniqstr (const uniqstr key, location loc)
|
||||
}
|
||||
|
||||
|
||||
/*-----------------------------------------------------------------------.
|
||||
| Find the semantic type named KEY, and return it. If it does not exist |
|
||||
| yet, create it. |
|
||||
`-----------------------------------------------------------------------*/
|
||||
|
||||
semantic_type *
|
||||
semantic_type_from_uniqstr (const uniqstr key)
|
||||
{
|
||||
semantic_type probe;
|
||||
semantic_type *entry;
|
||||
|
||||
probe.tag = key;
|
||||
entry = hash_lookup (semantic_type_table, &probe);
|
||||
|
||||
if (!entry)
|
||||
{
|
||||
/* First insertion in the hash. */
|
||||
entry = semantic_type_new (key);
|
||||
hash_insert (semantic_type_table, entry);
|
||||
}
|
||||
return entry;
|
||||
}
|
||||
|
||||
|
||||
/*----------------------------------------------------------------.
|
||||
| Find the symbol named KEY, and return it. If it does not exist |
|
||||
| yet, create it. |
|
||||
@@ -596,6 +743,18 @@ symbol_get (const char *key, location loc)
|
||||
}
|
||||
|
||||
|
||||
/*-----------------------------------------------------------------------.
|
||||
| Find the semantic type named KEY, and return it. If it does not exist |
|
||||
| yet, create it. |
|
||||
`-----------------------------------------------------------------------*/
|
||||
|
||||
semantic_type *
|
||||
semantic_type_get (const char *key)
|
||||
{
|
||||
return semantic_type_from_uniqstr (uniqstr_new (key));
|
||||
}
|
||||
|
||||
|
||||
/*------------------------------------------------------------------.
|
||||
| Generate a dummy nonterminal, whose name cannot conflict with the |
|
||||
| user's names. |
|
||||
@@ -631,6 +790,7 @@ void
|
||||
symbols_free (void)
|
||||
{
|
||||
hash_free (symbol_table);
|
||||
hash_free (semantic_type_table);
|
||||
free (symbols);
|
||||
}
|
||||
|
||||
|
||||
47
src/symtab.h
47
src/symtab.h
@@ -106,7 +106,6 @@ struct symbol
|
||||
bool declared;
|
||||
};
|
||||
|
||||
|
||||
/** Undefined user number. */
|
||||
#define USER_NUMBER_UNDEFINED -1
|
||||
|
||||
@@ -197,15 +196,51 @@ extern symbol *startsymbol;
|
||||
extern location startsymbol_location;
|
||||
|
||||
|
||||
/*---------------.
|
||||
| Symbol table. |
|
||||
`---------------*/
|
||||
/*-----------------.
|
||||
| Semantic types. |
|
||||
`-----------------*/
|
||||
|
||||
/** A semantic type and its associated \c \%destructor and \c \%printer.
|
||||
|
||||
/** Create the symbol table. */
|
||||
Access the fields of this struct only through the interface functions in
|
||||
this file. \sa symbol::destructor */
|
||||
typedef struct semantic_type {
|
||||
/** The key, name of the semantic type. */
|
||||
uniqstr tag;
|
||||
|
||||
/** Any \c %destructor declared for this semantic type. */
|
||||
const char *destructor;
|
||||
/** The location of \c semantic_type::destructor. */
|
||||
location destructor_location;
|
||||
|
||||
/** Any \c %printer declared for this semantic type. */
|
||||
const char *printer;
|
||||
/** The location of \c semantic_type::printer. */
|
||||
location printer_location;
|
||||
} semantic_type;
|
||||
|
||||
/** Fetch (or create) the semantic type associated to KEY. */
|
||||
semantic_type *semantic_type_from_uniqstr (const uniqstr key);
|
||||
|
||||
/** Fetch (or create) the semantic type associated to KEY. */
|
||||
semantic_type *semantic_type_get (const char *key);
|
||||
|
||||
/** Set the \c destructor associated with \c type. */
|
||||
void semantic_type_destructor_set (semantic_type *type, const char *destructor,
|
||||
location loc);
|
||||
|
||||
/** Set the \c printer associated with \c type. */
|
||||
void semantic_type_printer_set (semantic_type *type, const char *printer,
|
||||
location loc);
|
||||
|
||||
/*----------------------------------.
|
||||
| Symbol and semantic type tables. |
|
||||
`----------------------------------*/
|
||||
|
||||
/** Create the symbol and semantic type tables. */
|
||||
void symbols_new (void);
|
||||
|
||||
/** Free all the memory allocated for symbols. */
|
||||
/** Free all the memory allocated for symbols and semantic types. */
|
||||
void symbols_free (void);
|
||||
|
||||
/** Check that all the symbols are defined.
|
||||
|
||||
126
tests/actions.at
126
tests/actions.at
@@ -689,6 +689,132 @@ AT_CLEANUP
|
||||
|
||||
|
||||
|
||||
## ----------------------------------- ##
|
||||
## Per-type %printer and %destructor. ##
|
||||
## ----------------------------------- ##
|
||||
|
||||
AT_SETUP([Per-type %printer and %destructor])
|
||||
|
||||
AT_DATA_GRAMMAR([[input.y]],
|
||||
[[%error-verbose
|
||||
%debug
|
||||
|
||||
%{
|
||||
# include <stdio.h>
|
||||
# include <stdlib.h>
|
||||
static void yyerror (const char *msg);
|
||||
static int yylex (void);
|
||||
# define USE(SYM)
|
||||
%}
|
||||
|
||||
%union { int field0; int field1; int field2; }
|
||||
%type <field0> start 'a' 'g'
|
||||
%type <field1> 'e'
|
||||
%type <field2> 'f'
|
||||
%printer {
|
||||
fprintf (yyoutput, "%%symbol-default/<field2>/e printer");
|
||||
} %symbol-default 'e' <field2>
|
||||
%destructor {
|
||||
fprintf (stdout, "%%symbol-default/<field2>/e destructor.\n");
|
||||
} %symbol-default 'e' <field2>
|
||||
|
||||
%type <field1> 'b'
|
||||
%printer { fprintf (yyoutput, "<field1> printer"); } <field1>
|
||||
%destructor { fprintf (stdout, "<field1> destructor.\n"); } <field1>
|
||||
|
||||
%type <field0> 'c'
|
||||
%printer { fprintf (yyoutput, "'c' printer"); } 'c'
|
||||
%destructor { fprintf (stdout, "'c' destructor.\n"); } 'c'
|
||||
|
||||
%type <field1> 'd'
|
||||
%printer { fprintf (yyoutput, "'d' printer"); } 'd'
|
||||
%destructor { fprintf (stdout, "'d' destructor.\n"); } 'd'
|
||||
|
||||
%%
|
||||
|
||||
start:
|
||||
'a' 'b' 'c' 'd' 'e' 'f' 'g'
|
||||
{
|
||||
USE(($1, $2, $3, $4, $5, $6, $7));
|
||||
$$ = 'S';
|
||||
}
|
||||
;
|
||||
|
||||
%%
|
||||
|
||||
static int
|
||||
yylex (void)
|
||||
{
|
||||
static const char *input = "abcdef";
|
||||
return *input++;
|
||||
}
|
||||
|
||||
static void
|
||||
yyerror (const char *msg)
|
||||
{
|
||||
fprintf (stderr, "%s\n", msg);
|
||||
}
|
||||
|
||||
int
|
||||
main (void)
|
||||
{
|
||||
yydebug = 1;
|
||||
return yyparse ();
|
||||
}
|
||||
]])
|
||||
|
||||
AT_CHECK([bison -o input.c input.y])
|
||||
AT_COMPILE([input])
|
||||
AT_PARSER_CHECK([./input], 1,
|
||||
[[%symbol-default/<field2>/e destructor.
|
||||
%symbol-default/<field2>/e destructor.
|
||||
'd' destructor.
|
||||
'c' destructor.
|
||||
<field1> destructor.
|
||||
%symbol-default/<field2>/e destructor.
|
||||
]],
|
||||
[[Starting parse
|
||||
Entering state 0
|
||||
Reading a token: Next token is token 'a' (%symbol-default/<field2>/e printer)
|
||||
Shifting token 'a' (%symbol-default/<field2>/e printer)
|
||||
Entering state 1
|
||||
Reading a token: Next token is token 'b' (<field1> printer)
|
||||
Shifting token 'b' (<field1> printer)
|
||||
Entering state 3
|
||||
Reading a token: Next token is token 'c' ('c' printer)
|
||||
Shifting token 'c' ('c' printer)
|
||||
Entering state 5
|
||||
Reading a token: Next token is token 'd' ('d' printer)
|
||||
Shifting token 'd' ('d' printer)
|
||||
Entering state 6
|
||||
Reading a token: Next token is token 'e' (%symbol-default/<field2>/e printer)
|
||||
Shifting token 'e' (%symbol-default/<field2>/e printer)
|
||||
Entering state 7
|
||||
Reading a token: Next token is token 'f' (%symbol-default/<field2>/e printer)
|
||||
Shifting token 'f' (%symbol-default/<field2>/e printer)
|
||||
Entering state 8
|
||||
Reading a token: Now at end of input.
|
||||
syntax error, unexpected $end, expecting 'g'
|
||||
Error: popping token 'f' (%symbol-default/<field2>/e printer)
|
||||
Stack now 0 1 3 5 6 7
|
||||
Error: popping token 'e' (%symbol-default/<field2>/e printer)
|
||||
Stack now 0 1 3 5 6
|
||||
Error: popping token 'd' ('d' printer)
|
||||
Stack now 0 1 3 5
|
||||
Error: popping token 'c' ('c' printer)
|
||||
Stack now 0 1 3
|
||||
Error: popping token 'b' (<field1> printer)
|
||||
Stack now 0 1
|
||||
Error: popping token 'a' (%symbol-default/<field2>/e printer)
|
||||
Stack now 0
|
||||
Cleanup: discarding lookahead token $end ()
|
||||
Stack now 0
|
||||
]])
|
||||
|
||||
AT_CLEANUP
|
||||
|
||||
|
||||
|
||||
## ------------------------------------------------------------- ##
|
||||
## Default %printer and %destructor for user-defined end token. ##
|
||||
## ------------------------------------------------------------- ##
|
||||
|
||||
@@ -175,8 +175,8 @@ AT_CLEANUP
|
||||
AT_SETUP([Default %printer and %destructor redeclared])
|
||||
|
||||
AT_DATA([[input.y]],
|
||||
[[%destructor { destroy ($$); } %symbol-default
|
||||
%printer { destroy ($$); } %symbol-default
|
||||
[[%destructor { destroy ($$); } %symbol-default %symbol-default
|
||||
%printer { destroy ($$); } %symbol-default %symbol-default
|
||||
|
||||
%destructor { destroy ($$); } %symbol-default
|
||||
%printer { destroy ($$); } %symbol-default
|
||||
@@ -190,7 +190,11 @@ start: ;
|
||||
]])
|
||||
|
||||
AT_CHECK([bison input.y], [1], [],
|
||||
[[input.y:4.13-29: redeclaration for default %destructor
|
||||
[[input.y:1.13-29: redeclaration for default %destructor
|
||||
input.y:1.13-29: previous declaration
|
||||
input.y:2.10-26: redeclaration for default %printer
|
||||
input.y:2.10-26: previous declaration
|
||||
input.y:4.13-29: redeclaration for default %destructor
|
||||
input.y:1.13-29: previous declaration
|
||||
input.y:5.10-26: redeclaration for default %printer
|
||||
input.y:2.10-26: previous declaration
|
||||
@@ -203,6 +207,49 @@ input.y:5.10-26: previous declaration
|
||||
AT_CLEANUP
|
||||
|
||||
|
||||
## ---------------------------------------------- ##
|
||||
## Per-type %printer and %destructor redeclared. ##
|
||||
## ---------------------------------------------- ##
|
||||
|
||||
AT_SETUP([Per-type %printer and %destructor redeclared])
|
||||
|
||||
AT_DATA([[input.y]],
|
||||
[[%destructor { destroy ($$); } <field1> <field2>
|
||||
%printer { destroy ($$); } <field1> <field2>
|
||||
|
||||
%destructor { destroy ($$); } <field1> <field1>
|
||||
%printer { destroy ($$); } <field2> <field2>
|
||||
|
||||
%%
|
||||
|
||||
start: ;
|
||||
|
||||
%destructor { destroy ($$); } <field2> <field1>;
|
||||
%printer { destroy ($$); } <field2> <field1>;
|
||||
]])
|
||||
|
||||
AT_CHECK([bison input.y], [1], [],
|
||||
[[input.y:4.13-29: %destructor redeclaration for <field1>
|
||||
input.y:1.13-29: previous declaration
|
||||
input.y:4.13-29: %destructor redeclaration for <field1>
|
||||
input.y:4.13-29: previous declaration
|
||||
input.y:5.10-26: %printer redeclaration for <field2>
|
||||
input.y:2.10-26: previous declaration
|
||||
input.y:5.10-26: %printer redeclaration for <field2>
|
||||
input.y:5.10-26: previous declaration
|
||||
input.y:11.13-29: %destructor redeclaration for <field1>
|
||||
input.y:4.13-29: previous declaration
|
||||
input.y:11.13-29: %destructor redeclaration for <field2>
|
||||
input.y:1.13-29: previous declaration
|
||||
input.y:12.10-26: %printer redeclaration for <field1>
|
||||
input.y:2.10-26: previous declaration
|
||||
input.y:12.10-26: %printer redeclaration for <field2>
|
||||
input.y:5.10-26: previous declaration
|
||||
]])
|
||||
|
||||
AT_CLEANUP
|
||||
|
||||
|
||||
## ---------------------------------------- ##
|
||||
## Unused values with default %destructor. ##
|
||||
## ---------------------------------------- ##
|
||||
@@ -227,6 +274,31 @@ input.y:6.6-8: warning: unset value: $$
|
||||
AT_CLEANUP
|
||||
|
||||
|
||||
## ----------------------------------------- ##
|
||||
## Unused values with per-type %destructor. ##
|
||||
## ----------------------------------------- ##
|
||||
|
||||
AT_SETUP([Unused values with per-type %destructor])
|
||||
|
||||
AT_DATA([[input.y]],
|
||||
[[%destructor { destroy ($$); } <field1>
|
||||
%type <field1> start end
|
||||
|
||||
%%
|
||||
|
||||
start: end end { $1; } ;
|
||||
end: { } ;
|
||||
]])
|
||||
|
||||
AT_CHECK([bison input.y], [0], [],
|
||||
[[input.y:6.8-22: warning: unset value: $$
|
||||
input.y:6.8-22: warning: unused value: $2
|
||||
input.y:7.6-8: warning: unset value: $$
|
||||
]])
|
||||
|
||||
AT_CLEANUP
|
||||
|
||||
|
||||
## ---------------------- ##
|
||||
## Incompatible Aliases. ##
|
||||
## ---------------------- ##
|
||||
|
||||
Reference in New Issue
Block a user