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Change the handling of the symbols in the skeletons.

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Before we were using tables which lines were the symbols and which
columns were things like number, tag, type-name etc.  It is was
difficult to extend: each time a column was added, all the numbers had
to be updated (you asked for colon $2, not for "tag").  Also, it was
hard to filter these tables when only a subset of the symbols (say the
tokens, or the nterms, or the tokens that have and external number
*and* a type-name) was of interest.

Now instead of monolithic tables, we define one macro per cell.  For
instance "b4_symbol(0, tag)" is a macro name which contents is
self-decriptive.  The macro "b4_symbol" provides easier access to
these cells.

	* src/output.c (type_names_output): Remove.
	(symbol_numbers_output, symbol_definitions_output): New.
	(muscles_output): Call them.
	(prepare_symbols): Define b4_symbols_number.
This commit is contained in:
Akim Demaille
2008-08-12 21:48:53 +02:00
parent 5263bea9f7
commit d69c9694a7
3 changed files with 91 additions and 31 deletions
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65
src/output.c
View File

@@ -143,6 +143,7 @@ prepare_symbols (void)
MUSCLE_INSERT_BOOL ("token_table", token_table_flag);
MUSCLE_INSERT_INT ("tokens_number", ntokens);
MUSCLE_INSERT_INT ("nterms_number", nvars);
MUSCLE_INSERT_INT ("symbols_number", nsyms);
MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number);
MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number);
@@ -283,26 +284,17 @@ prepare_states (void)
/*-----------------------------------------------.
| For each symbol type, its tags and type name. |
`-----------------------------------------------*/
/*-------------------------------------.
| The list of all the symbol numbers. |
`-------------------------------------*/
static void
type_names_output (FILE *out)
symbol_numbers_output (FILE *out)
{
int i;
fputs ("m4_define([b4_type_names],\n[", out);
fputs ("m4_define([b4_symbol_numbers],\n[", out);
for (i = 0; i < nsyms; ++i)
{
symbol *sym = symbols[i];
/* Symbol-name, Symbol-number, optional typename. */
fprintf (out, "%s[", i ? ",\n" : "");
escaped_output (out, sym->tag);
fprintf (out, ", %d, [[%s]]]",
sym->number,
sym->type_name ? sym->type_name : "");
}
fprintf (out, "%s[%d]", i ? ", " : "", i);
fputs ("])\n\n", out);
}
@@ -351,6 +343,42 @@ merger_output (FILE *out)
fputs ("]])\n\n", out);
}
/*---------------------------------------.
| Output the symbol definitions to OUT. |
`---------------------------------------*/
static void
symbol_definitions_output (FILE *out)
{
int i;
for (i = 0; i < nsyms; ++i)
{
symbol *sym = symbols[i];
const char *key;
#define SET_KEY(Entry) \
obstack_fgrow2 (&format_obstack, "symbol(%d, %s)", i, Entry); \
obstack_1grow (&format_obstack, 0); \
key = obstack_finish (&format_obstack);
SET_KEY("tag");
MUSCLE_INSERT_STRING (key, sym->tag);
SET_KEY("user_number");
MUSCLE_INSERT_INT (key, sym->user_token_number);
SET_KEY("number");
MUSCLE_INSERT_INT (key, sym->number);
SET_KEY("type_name");
MUSCLE_INSERT_STRING (key, sym->type_name ? sym->type_name : "");
#undef SET_KEY
}
}
/*--------------------------------------.
| Output the tokens definition to OUT. |
`--------------------------------------*/
@@ -496,12 +524,13 @@ muscles_output (FILE *out)
{
fputs ("m4_init()\n", out);
type_names_output (out);
user_actions_output (out);
merger_output (out);
token_definitions_output (out);
symbol_code_props_output (out, "destructors", &symbol_destructor_get);
symbol_code_props_output (out, "printers", &symbol_printer_get);
symbol_definitions_output (out);
symbol_numbers_output (out);
token_definitions_output (out);
user_actions_output (out);
muscles_m4_output (out);
}