From b2a0b7ca70f9490693d517d10c9c4a64c9fc1af0 Mon Sep 17 00:00:00 2001 From: "Joel E. Denny" Date: Mon, 4 Sep 2006 22:20:52 +0000 Subject: [PATCH] Finish implementation of per-type %destructor/%printer. Discussed starting at and . * 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. --- ChangeLog | 29 ++++++++ NEWS | 31 ++++---- doc/bison.texinfo | 34 +++++---- src/symlist.c | 6 +- src/symtab.c | 178 +++++++++++++++++++++++++++++++++++++++++++--- src/symtab.h | 47 ++++++++++-- tests/actions.at | 126 ++++++++++++++++++++++++++++++++ tests/input.at | 78 +++++++++++++++++++- 8 files changed, 484 insertions(+), 45 deletions(-) diff --git a/ChangeLog b/ChangeLog index d582940b..dfa5420a 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,32 @@ +2006-09-04 Joel E. Denny + + Finish implementation of per-type %destructor/%printer. Discussed + starting at + + and + . + * 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. + 2006-09-04 Joel E. Denny Require default %destructor/%printer to be declared using diff --git a/NEWS b/NEWS index 5ecabf59..749a2fa4 100644 --- a/NEWS +++ b/NEWS @@ -12,22 +12,27 @@ Changes in version 2.3+: * Locations columns and lines start at 1. In accordance with the GNU Coding Standards and Emacs. -* You may now declare a default %destructor and %printer: +* You may now declare per-type and default %destructor's and %printer's: For example: - %union { char *string; } - %token STRING1 - %token STRING2 - %type string1 - %type string2 - %destructor { free ($$); } %symbol-default - %destructor { free ($$); printf ("%d", @$.first_line); } STRING1 string1 - - guarantees that, when the parser discards any user-defined symbol, it passes - its semantic value to `free'. However, when the parser discards a `STRING1' - or a `string1', it also prints its line number to `stdout'. It performs only - the second `%destructor' in this case, so it invokes `free' only once. + %union { char *string; } + %token STRING1 + %token STRING2 + %type string1 + %type string2 + %union { char character; } + %token CHR + %type chr + %destructor { free ($$); } %symbol-default + %destructor { free ($$); printf ("%d", @$.first_line); } STRING1 string1 + %destructor { } + + guarantees that, when the parser discards any user-defined symbol that has a + semantic type tag other than `', it passes its semantic value to + `free'. However, when the parser discards a `STRING1' or a `string1', it + also prints its line number to `stdout'. It performs only the second + `%destructor' in this case, so it invokes `free' only once. * Except for LALR(1) parsers in C with POSIX Yacc emulation enabled (with `-y', `--yacc', or `%yacc'), Bison no longer generates #define statements for diff --git a/doc/bison.texinfo b/doc/bison.texinfo index e7325ee3..94a384e0 100644 --- a/doc/bison.texinfo +++ b/doc/bison.texinfo @@ -4011,19 +4011,24 @@ Within @var{code}, @code{$$} designates the semantic value associated with the discarded symbol, and @code{@@$} designates its location. The additional parser parameters are also available (@pxref{Parser Function, , The Parser Function @code{yyparse}}). -@end deffn -@deffn {Directive} %destructor @{ @var{code} @} %symbol-default -@cindex default %destructor -@findex %symbol-default -Invoke the braced @var{code} whenever the parser discards any user-defined -grammar symbol for which the user has not specifically declared any -@code{%destructor}. -This is known as the default @code{%destructor}. -As in the previous form, @code{$$}, @code{@@$}, and the additional parser -parameters are available. +When a symbol is listed among @var{symbols}, its @code{%destructor} is called a +per-symbol @code{%destructor}. +You may also define a per-type @code{%destructor} by listing a semantic type +among @var{symbols}. +In that case, the parser will invoke this @var{code} whenever it discards any +grammar symbol that has that semantic type unless that symbol has its own +per-symbol @code{%destructor}. + +Finally, you may define a default @code{%destructor} by placing +@code{%symbol-default} in the @var{symbols} list of exactly one +@code{%destructor} declaration in your grammar file. +In that case, the parser will invoke the associated @var{code} whenever it +discards any user-defined grammar symbol for which there is no per-type or +per-symbol @code{%destructor}. @end deffn +@noindent For instance: @smallexample @@ -4032,13 +4037,18 @@ For instance: %token STRING2 %type string1 %type string2 +%union @{ char character; @} +%token CHR +%type chr %destructor @{ free ($$); @} %symbol-default %destructor @{ free ($$); printf ("%d", @@$.first_line); @} STRING1 string1 +%destructor @{ @} @end smallexample @noindent -guarantees that, when the parser discards any user-defined symbol, it passes -its semantic value to @code{free}. +guarantees that, when the parser discards any user-defined symbol that has a +semantic type tag other than @code{}, it passes its semantic value +to @code{free}. However, when the parser discards a @code{STRING1} or a @code{string1}, it also prints its line number to @code{stdout}. It performs only the second @code{%destructor} in this case, so it invokes diff --git a/src/symlist.c b/src/symlist.c index 0e84a528..d91c3fca 100644 --- a/src/symlist.c +++ b/src/symlist.c @@ -212,7 +212,8 @@ symbol_list_destructor_set (symbol_list *node, const char *destructor, symbol_destructor_set (node->content.sym, destructor, loc); break; case SYMLIST_TYPE: - /* FIXME: */ + semantic_type_destructor_set ( + semantic_type_get (node->content.type_name), destructor, loc); break; case SYMLIST_DEFAULT: default_destructor_set (destructor, loc); @@ -229,7 +230,8 @@ symbol_list_printer_set (symbol_list *node, const char *printer, location loc) symbol_printer_set (node->content.sym, printer, loc); break; case SYMLIST_TYPE: - /* FIXME: */ + semantic_type_printer_set ( + semantic_type_get (node->content.type_name), printer, loc); break; case SYMLIST_DEFAULT: default_printer_set (printer, loc); diff --git a/src/symtab.c b/src/symtab.c index e3c450f4..4470f3a1 100644 --- a/src/symtab.c +++ b/src/symtab.c @@ -83,6 +83,23 @@ symbol_new (uniqstr tag, location loc) return res; } +/*----------------------------------------. +| Create a new semantic type, named TAG. | +`----------------------------------------*/ + +static semantic_type * +semantic_type_new (uniqstr tag) +{ + semantic_type *res = xmalloc (sizeof *res); + + uniqstr_assert (tag); + res->tag = tag; + res->destructor = NULL; + res->printer = NULL; + + return res; +} + /*-----------------. | Print a symbol. | @@ -114,12 +131,21 @@ symbol_print (symbol *s, FILE *f) `------------------------------------------------------------------*/ static void -redeclaration (symbol* s, const char *what, location first, location second) +symbol_redeclaration (symbol *s, const char *what, location first, + location second) { complain_at (second, _("%s redeclaration for %s"), what, s->tag); complain_at (first, _("previous declaration")); } +static void +semantic_type_redeclaration (semantic_type *s, const char *what, location first, + location second) +{ + complain_at (second, _("%s redeclaration for <%s>"), what, s->tag); + complain_at (first, _("previous declaration")); +} + /*-----------------------------------------------------------------. | Set the TYPE_NAME associated with SYM. Does nothing if passed 0 | @@ -132,7 +158,7 @@ symbol_type_set (symbol *sym, uniqstr type_name, location loc) if (type_name) { if (sym->type_name) - redeclaration (sym, "%type", sym->type_location, loc); + symbol_redeclaration (sym, "%type", sym->type_location, loc); uniqstr_assert (type_name); sym->type_name = type_name; sym->type_location = loc; @@ -150,12 +176,31 @@ symbol_destructor_set (symbol *sym, const char *destructor, location loc) if (destructor) { if (sym->destructor) - redeclaration (sym, "%destructor", sym->destructor_location, loc); + symbol_redeclaration (sym, "%destructor", sym->destructor_location, + loc); sym->destructor = destructor; sym->destructor_location = loc; } } +/*-------------------------------------------------------------------. +| Set the DESTRUCTOR associated with TYPE. Do nothing if passed 0. | +`-------------------------------------------------------------------*/ + +void +semantic_type_destructor_set (semantic_type *type, const char *destructor, + location loc) +{ + if (destructor) + { + if (type->destructor) + semantic_type_redeclaration (type, "%destructor", + type->destructor_location, loc); + type->destructor = destructor; + type->destructor_location = loc; + } +} + /*---------------------------------------. | Get the computed %destructor for SYM. | `---------------------------------------*/ @@ -167,6 +212,14 @@ symbol_destructor_get (symbol *sym) if (sym->destructor != NULL) return sym->destructor; + /* Per-type %destructor. */ + if (sym->type_name) + { + semantic_type *type = semantic_type_get (sym->type_name); + if (type->destructor) + return type->destructor; + } + /* Apply the default %destructor only to user-defined symbols. */ if (sym->tag[0] == '$' || sym == errtoken) return NULL; @@ -182,6 +235,12 @@ symbol_destructor_location_get (symbol *sym) { if (sym->destructor != NULL) return sym->destructor_location; + if (sym->type_name) + { + semantic_type *type = semantic_type_get (sym->type_name); + if (type->destructor) + return type->destructor_location; + } return default_destructor_location; } @@ -195,12 +254,30 @@ symbol_printer_set (symbol *sym, const char *printer, location loc) if (printer) { if (sym->printer) - redeclaration (sym, "%printer", sym->printer_location, loc); + symbol_redeclaration (sym, "%printer", sym->printer_location, loc); sym->printer = printer; sym->printer_location = loc; } } +/*----------------------------------------------------------------. +| Set the PRINTER associated with TYPE. Do nothing if passed 0. | +`----------------------------------------------------------------*/ + +void +semantic_type_printer_set (semantic_type *type, const char *printer, + location loc) +{ + if (printer) + { + if (type->printer) + semantic_type_redeclaration (type, "%printer", type->printer_location, + loc); + type->printer = printer; + type->printer_location = loc; + } +} + /*------------------------------------. | Get the computed %printer for SYM. | `------------------------------------*/ @@ -212,6 +289,14 @@ symbol_printer_get (symbol *sym) if (sym->printer != NULL) return sym->printer; + /* Per-type %printer. */ + if (sym->type_name) + { + semantic_type *type = semantic_type_get (sym->type_name); + if (type->printer) + return type->printer; + } + /* Apply the default %printer only to user-defined symbols. */ if (sym->tag[0] == '$' || sym == errtoken) return NULL; @@ -227,6 +312,12 @@ symbol_printer_location_get (symbol *sym) { if (sym->printer != NULL) return sym->printer_location; + if (sym->type_name) + { + 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); 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); } diff --git a/src/symtab.h b/src/symtab.h index 647a9e4c..243d3d0c 100644 --- a/src/symtab.h +++ b/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. + + 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 table. */ +/** 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. diff --git a/tests/actions.at b/tests/actions.at index d0cb12f9..e1b2cb99 100644 --- a/tests/actions.at +++ b/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 +# include + static void yyerror (const char *msg); + static int yylex (void); +# define USE(SYM) +%} + +%union { int field0; int field1; int field2; } +%type start 'a' 'g' +%type 'e' +%type 'f' +%printer { + fprintf (yyoutput, "%%symbol-default//e printer"); +} %symbol-default 'e' +%destructor { + fprintf (stdout, "%%symbol-default//e destructor.\n"); +} %symbol-default 'e' + +%type 'b' +%printer { fprintf (yyoutput, " printer"); } +%destructor { fprintf (stdout, " destructor.\n"); } + +%type 'c' +%printer { fprintf (yyoutput, "'c' printer"); } 'c' +%destructor { fprintf (stdout, "'c' destructor.\n"); } 'c' + +%type '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//e destructor. +%symbol-default//e destructor. +'d' destructor. +'c' destructor. + destructor. +%symbol-default//e destructor. +]], +[[Starting parse +Entering state 0 +Reading a token: Next token is token 'a' (%symbol-default//e printer) +Shifting token 'a' (%symbol-default//e printer) +Entering state 1 +Reading a token: Next token is token 'b' ( printer) +Shifting token 'b' ( 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//e printer) +Shifting token 'e' (%symbol-default//e printer) +Entering state 7 +Reading a token: Next token is token 'f' (%symbol-default//e printer) +Shifting token 'f' (%symbol-default//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//e printer) +Stack now 0 1 3 5 6 7 +Error: popping token 'e' (%symbol-default//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' ( printer) +Stack now 0 1 +Error: popping token 'a' (%symbol-default//e printer) +Stack now 0 +Cleanup: discarding lookahead token $end () +Stack now 0 +]]) + +AT_CLEANUP + + + ## ------------------------------------------------------------- ## ## Default %printer and %destructor for user-defined end token. ## ## ------------------------------------------------------------- ## diff --git a/tests/input.at b/tests/input.at index 5ddd3b99..7b009758 100644 --- a/tests/input.at +++ b/tests/input.at @@ -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 ($$); } %symbol-default @@ -190,7 +190,11 @@ start: ; ]]) AT_CHECK([bison input.y], [1], [], -[[input.y:4.13-29: redeclaration for default %destructor +[[input.y:1.13-29: redeclaration for default %destructor +input.y:1.13-29: previous declaration +input.y:2.10-26: redeclaration for default %printer +input.y:2.10-26: previous declaration +input.y:4.13-29: redeclaration for default %destructor input.y:1.13-29: previous declaration input.y:5.10-26: redeclaration for default %printer input.y:2.10-26: previous declaration @@ -203,6 +207,49 @@ input.y:5.10-26: previous declaration AT_CLEANUP +## ---------------------------------------------- ## +## Per-type %printer and %destructor redeclared. ## +## ---------------------------------------------- ## + +AT_SETUP([Per-type %printer and %destructor redeclared]) + +AT_DATA([[input.y]], +[[%destructor { destroy ($$); } +%printer { destroy ($$); } + +%destructor { destroy ($$); } +%printer { destroy ($$); } + +%% + +start: ; + +%destructor { destroy ($$); } ; +%printer { destroy ($$); } ; +]]) + +AT_CHECK([bison input.y], [1], [], +[[input.y:4.13-29: %destructor redeclaration for +input.y:1.13-29: previous declaration +input.y:4.13-29: %destructor redeclaration for +input.y:4.13-29: previous declaration +input.y:5.10-26: %printer redeclaration for +input.y:2.10-26: previous declaration +input.y:5.10-26: %printer redeclaration for +input.y:5.10-26: previous declaration +input.y:11.13-29: %destructor redeclaration for +input.y:4.13-29: previous declaration +input.y:11.13-29: %destructor redeclaration for +input.y:1.13-29: previous declaration +input.y:12.10-26: %printer redeclaration for +input.y:2.10-26: previous declaration +input.y:12.10-26: %printer redeclaration for +input.y:5.10-26: previous declaration +]]) + +AT_CLEANUP + + ## ---------------------------------------- ## ## Unused values with default %destructor. ## ## ---------------------------------------- ## @@ -227,6 +274,31 @@ input.y:6.6-8: warning: unset value: $$ AT_CLEANUP +## ----------------------------------------- ## +## Unused values with per-type %destructor. ## +## ----------------------------------------- ## + +AT_SETUP([Unused values with per-type %destructor]) + +AT_DATA([[input.y]], +[[%destructor { destroy ($$); } +%type start end + +%% + +start: end end { $1; } ; +end: { } ; +]]) + +AT_CHECK([bison input.y], [0], [], +[[input.y:6.8-22: warning: unset value: $$ +input.y:6.8-22: warning: unused value: $2 +input.y:7.6-8: warning: unset value: $$ +]]) + +AT_CLEANUP + + ## ---------------------- ## ## Incompatible Aliases. ## ## ---------------------- ## -- 2.47.2