/* Input parser for bison
- Copyright 1984, 1986, 1989, 1992, 1998, 2000
+ Copyright 1984, 1986, 1989, 1992, 1998, 2000, 2001
Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
#include "quote.h"
#include "getargs.h"
#include "files.h"
-#include "xalloc.h"
#include "symtab.h"
+#include "options.h"
#include "lex.h"
#include "gram.h"
#include "complain.h"
#include "output.h"
#include "reader.h"
#include "conflicts.h"
-
-/* Number of slots allocated (but not necessarily used yet) in `rline' */
-static int rline_allocated;
+#include "muscle_tab.h"
typedef struct symbol_list
{
struct symbol_list *next;
bucket *sym;
+ int line;
bucket *ruleprec;
}
symbol_list;
/* Incremented for each %left, %right or %nonassoc seen */
static int lastprec;
-/* Incremented for each generated symbol */
-static int gensym_count;
-
static bucket *errtoken;
static bucket *undeftoken;
+
+
+static symbol_list *
+symbol_list_new (bucket *sym)
+{
+ symbol_list *res = XMALLOC (symbol_list, 1);
+ res->next = NULL;
+ res->sym = sym;
+ res->line = lineno;
+ res->ruleprec = NULL;
+ return res;
+}
+
\f
/*===================\
`--------------------------------------------------------------*/
static char *
-get_type_name (int n, symbol_list * rule)
+get_type_name (int n, symbol_list *rule)
{
int i;
symbol_list *rp;
return rp->sym->type_name;
}
\f
-/*-----------------------------------------------------------------.
-| Dump the string from FIN to FOUT and OOUT if non null. MATCH is |
-| the delimiter of the string (either ' or "). |
-`-----------------------------------------------------------------*/
+/*------------------------------------------------------------.
+| Dump the string from FIN to OOUT if non null. MATCH is the |
+| delimiter of the string (either ' or "). |
+`------------------------------------------------------------*/
static inline void
-copy_string (FILE *fin, FILE *fout, struct obstack *oout, int match)
+copy_string2 (FILE *fin, struct obstack *oout, int match, int store)
{
int c;
- if (fout)
- putc (match, fout);
- if (oout)
+ if (store)
obstack_1grow (oout, match);
c = getc (fin);
continue;
}
- if (fout)
- putc (c, fout);
- if (oout)
- obstack_1grow (oout, c);
+ obstack_1grow (oout, c);
if (c == '\\')
{
c = getc (fin);
if (c == EOF)
fatal (_("unterminated string at end of file"));
- if (fout)
- putc (c, fout);
- if (oout)
- obstack_1grow (oout, c);
+ obstack_1grow (oout, c);
if (c == '\n')
lineno++;
c = getc (fin);
}
- if (fout)
- putc (c, fout);
- if (oout)
+ if (store)
obstack_1grow (oout, c);
}
+/* FIXME. */
-/*----------------------------------------------------------------.
-| Dump the wannabee comment from IN to OUT1 and OUT2. In fact we |
-| just saw a `/', which might or might not be a comment. In any |
-| case, copy what we saw. |
-| |
-| OUT2 might be NULL. |
-`----------------------------------------------------------------*/
+static inline void
+copy_string (FILE *fin, struct obstack *oout, int match)
+{
+ copy_string2 (fin, oout, match, 1);
+}
+
+/* FIXME. */
static inline void
-copy_comment2 (FILE *fin, FILE *out1,
- struct obstack *oout2, struct obstack *oout)
+copy_identifier (FILE *fin, struct obstack *oout)
+{
+ int c;
+
+ while (isalnum (c = getc (fin)) || c == '_')
+ obstack_1grow (oout, c);
+
+ ungetc (c, fin);
+}
+
+/*-----------------------------------------------------------------.
+| Dump the wannabee comment from IN to OUT1 and OUT2 (which can be |
+| NULL). In fact we just saw a `/', which might or might not be a |
+| comment. In any case, copy what we saw. |
+| |
+| OUT2 might be NULL. |
+`-----------------------------------------------------------------*/
+
+static inline void
+copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
{
int cplus_comment;
int ended;
int c;
/* We read a `/', output it. */
- if (out1)
- putc ('/', out1);
- if (oout)
- obstack_1grow (oout, '/');
+ obstack_1grow (oout1, '/');
if (oout2)
obstack_1grow (oout2, '/');
return;
}
- if (out1)
- putc (c, out1);
- if (oout)
- obstack_1grow (oout, c);
+ obstack_1grow (oout1, c);
if (oout2)
obstack_1grow (oout2, c);
c = getc (fin);
{
while (c == '*')
{
- if (out1)
- putc (c, out1);
- if (oout)
- obstack_1grow (oout, c);
+ obstack_1grow (oout1, c);
if (oout2)
obstack_1grow (oout2, c);
c = getc (fin);
if (c == '/')
{
- if (out1)
- putc (c, out1);
- if (oout)
- obstack_1grow (oout, c);
+ obstack_1grow (oout1, c);
if (oout2)
obstack_1grow (oout2, c);
ended = 1;
else if (c == '\n')
{
lineno++;
- if (out1)
- putc (c, out1);
- if (oout)
- obstack_1grow (oout, c);
+ obstack_1grow (oout1, c);
if (oout2)
obstack_1grow (oout2, c);
if (cplus_comment)
fatal (_("unterminated comment"));
else
{
- if (out1)
- putc (c, out1);
- if (oout)
- obstack_1grow (oout, c);
+ obstack_1grow (oout1, c);
if (oout2)
obstack_1grow (oout2, c);
c = getc (fin);
/*-------------------------------------------------------------------.
| Dump the comment (actually the current string starting with a `/') |
-| from FIN to FOUT. |
+| from FIN to OOUT. |
`-------------------------------------------------------------------*/
static inline void
-copy_comment (FILE *fin, FILE *fout, struct obstack *oout)
+copy_comment (FILE *fin, struct obstack *oout)
{
- copy_comment2 (fin, fout, NULL, oout);
+ copy_comment2 (fin, oout, NULL);
}
/*-----------------------------------------------------------------.
-| FIN is pointing to a location (i.e., a `@'). Output to FOUT a |
+| FIN is pointing to a location (i.e., a `@'). Output to OOUT a |
| reference to this location. STACK_OFFSET is the number of values |
| in the current rule so far, which says where to find `$0' with |
| respect to the top of the stack. |
`-----------------------------------------------------------------*/
static inline void
-copy_at (FILE *fin, FILE *fout, struct obstack *oout, int stack_offset)
+copy_at (FILE *fin, struct obstack *oout, int stack_offset)
{
int c;
c = getc (fin);
if (c == '$')
{
- if (fout)
- fprintf (fout, "yyloc");
- if (oout)
- obstack_grow_string (oout, "yyloc");
+ obstack_sgrow (oout, "yyloc");
locations_flag = 1;
}
else if (isdigit (c) || c == '-')
{
int n;
- char buf[4096];
ungetc (c, fin);
n = read_signed_integer (fin);
- sprintf (buf, "yylsp[%d]", n - stack_offset);
- if (fout)
- fputs (buf, fout);
- if (oout)
- obstack_grow (oout, buf, strlen (buf));
+ obstack_fgrow1 (oout, "yylsp[%d]", n - stack_offset);
locations_flag = 1;
}
else
| |
| Possible inputs: $[<TYPENAME>]($|integer) |
| |
-| Output to FOUT a reference to this semantic value. STACK_OFFSET is |
+| Output to OOUT a reference to this semantic value. STACK_OFFSET is |
| the number of values in the current rule so far, which says where |
| to find `$0' with respect to the top of the stack. |
`-------------------------------------------------------------------*/
static inline void
-copy_dollar (FILE *fin, FILE *fout, struct obstack *oout,
+copy_dollar (FILE *fin, struct obstack *oout,
symbol_list *rule, int stack_offset)
{
int c = getc (fin);
- char *type_name = NULL;
+ const char *type_name = NULL;
/* Get the type name if explicit. */
if (c == '<')
if (c == '$')
{
- if (fout)
- fputs ("yyval", fout);
- if (oout)
- obstack_grow_string (oout, "yyval");
+ obstack_sgrow (oout, "yyval");
if (!type_name)
type_name = get_type_name (0, rule);
if (type_name)
- {
- if (fout)
- fprintf (fout, ".%s", type_name);
- if (oout)
- obstack_fgrow1 (oout, ".%s", type_name);
- }
+ obstack_fgrow1 (oout, ".%s", type_name);
if (!type_name && typed)
complain (_("$$ of `%s' has no declared type"),
rule->sym->tag);
if (!type_name && n > 0)
type_name = get_type_name (n, rule);
- if (fout)
- fprintf (fout, "yyvsp[%d]", n - stack_offset);
- if (oout)
- obstack_fgrow1 (oout, "yyvsp[%d]", n - stack_offset);
+ obstack_fgrow1 (oout, "yyvsp[%d]", n - stack_offset);
if (type_name)
- {
- if (fout)
- fprintf (fout, ".%s", type_name);
- if (oout)
- obstack_fgrow1 (oout, ".%s", type_name);
- }
+ obstack_fgrow1 (oout, ".%s", type_name);
if (!type_name && typed)
complain (_("$%d of `%s' has no declared type"),
n, rule->sym->tag);
/* -1 while reading a character if prev char was %. */
int after_percent;
+#if 0
if (!no_lines_flag)
- obstack_fgrow2 (&attrs_obstack, "#line %d %s\n",
- lineno, quotearg_style (c_quoting_style, infile));
+ {
+ obstack_fgrow2 (&attrs_obstack, muscle_find ("linef"),
+ lineno, quotearg_style (c_quoting_style,
+ muscle_find("filename")));
+ }
+#endif
after_percent = 0;
case '\'':
case '"':
- copy_string (finput, 0, &attrs_obstack, c);
+ copy_string (finput, &attrs_obstack, c);
break;
case '/':
- copy_comment (finput, 0, &attrs_obstack);
+ copy_comment (finput, &attrs_obstack);
break;
case EOF:
static void
parse_token_decl (symbol_class what_is, symbol_class what_is_not)
{
- int token = 0;
- char *typename = 0;
+ token_t token = tok_undef;
+ char *typename = NULL;
/* The symbol being defined. */
struct bucket *symbol = NULL;
fatal (_("Premature EOF after %s"), token_buffer);
token = lex ();
- if (token == COMMA)
+ if (token == tok_comma)
{
symbol = NULL;
continue;
}
- if (token == TYPENAME)
+ if (token == tok_typename)
{
typename = xstrdup (token_buffer);
value_components_used = 1;
symbol = NULL;
}
- else if (token == IDENTIFIER && *symval->tag == '\"' && symbol)
+ else if (token == tok_identifier && *symval->tag == '\"' && symbol)
{
if (symval->alias)
warn (_("symbol `%s' used more than once as a literal string"),
/* symbol and symval combined are only one symbol */
nsyms--;
}
- translations = 1;
symbol = NULL;
}
- else if (token == IDENTIFIER)
+ else if (token == tok_identifier)
{
int oldclass = symval->class;
symbol = symval;
complain (_("type redeclaration for %s"), symbol->tag);
}
}
- else if (symbol && token == NUMBER)
+ else if (symbol && token == tok_number)
{
symbol->user_token_number = numval;
- translations = 1;
}
else
{
complain (_("`%s' is invalid in %s"),
- token_buffer, (what_is == token_sym) ? "%token" : "%nterm");
+ token_buffer,
+ (what_is == token_sym) ? "%token" : "%nterm");
skip_to_char ('%');
}
}
{
if (start_flag)
complain (_("multiple %s declarations"), "%start");
- if (lex () != IDENTIFIER)
+ if (lex () != tok_identifier)
complain (_("invalid %s declaration"), "%start");
else
{
{
char *name;
- if (lex () != TYPENAME)
+ if (lex () != tok_typename)
{
complain ("%s", _("%type declaration has no <typename>"));
skip_to_char ('%');
for (;;)
{
- int t;
+ token_t t;
int tmp_char = ungetc (skip_white_space (), finput);
if (tmp_char == '%')
switch (t)
{
- case COMMA:
- case SEMICOLON:
+ case tok_comma:
+ case tok_semicolon:
break;
- case IDENTIFIER:
+ case tok_identifier:
if (symval->type_name == NULL)
symval->type_name = name;
else if (strcmp (name, symval->type_name) != 0)
for (;;)
{
- int t;
+ token_t t;
int tmp_char = ungetc (skip_white_space (), finput);
if (tmp_char == '%')
switch (t)
{
- case TYPENAME:
+ case tok_typename:
name = xstrdup (token_buffer);
break;
- case COMMA:
+ case tok_comma:
break;
- case IDENTIFIER:
+ case tok_identifier:
if (symval->prec != 0)
complain (_("redefining precedence of %s"), symval->tag);
symval->prec = lastprec;
}
break;
- case NUMBER:
- if (prev == IDENTIFIER)
+ case tok_number:
+ if (prev == tok_identifier)
{
symval->user_token_number = numval;
- translations = 1;
}
else
{
}
break;
- case SEMICOLON:
+ case tok_semicolon:
return;
default:
}
prev = t;
-
}
}
/*--------------------------------------------------------------.
-| Copy the union declaration into ATTRS_OBSTACK (and fdefines), |
-| where it is made into the definition of YYSTYPE, the type of |
-| elements of the parser value stack. |
+| Copy the union declaration into the stype muscle |
+| (and fdefines), where it is made into the definition of |
+| YYSTYPE, the type of elements of the parser value stack. |
`--------------------------------------------------------------*/
static void
{
int c;
int count = 0;
+ struct obstack union_obstack;
+ const char *prologue = "\
+#ifndef YYSTYPE\n\
+typedef union";
+ const char *epilogue = "\
+ yystype;\n\
+# define YYSTYPE yystype\n\
+#endif\n";
if (typed)
complain (_("multiple %s declarations"), "%union");
typed = 1;
- if (!no_lines_flag)
- obstack_fgrow2 (&attrs_obstack, "\n#line %d %s\n",
- lineno, quotearg_style (c_quoting_style, infile));
- else
+ /* FIXME: I'm worried: are you sure attrs_obstack is properly
+ filled? */
+ /* I don't see any reasons to keep this line, because we should
+ create a special skeleton for this option. */
+ if (no_lines_flag)
obstack_1grow (&attrs_obstack, '\n');
- obstack_grow_string (&attrs_obstack, "typedef union");
+ obstack_init (&union_obstack);
+ obstack_sgrow (&union_obstack, "union");
if (defines_flag)
- obstack_grow_string (&defines_obstack, "typedef union");
+ obstack_sgrow (&defines_obstack, prologue);
c = getc (finput);
while (c != EOF)
{
- obstack_1grow (&attrs_obstack, c);
- if (defines_flag)
- obstack_1grow (&defines_obstack, c);
+ /* If C contains '/', it is output by copy_comment (). */
+ if (c != '/')
+ {
+ obstack_1grow (&union_obstack, c);
+ if (defines_flag)
+ obstack_1grow (&defines_obstack, c);
+ }
switch (c)
{
break;
case '/':
- copy_comment2 (finput, 0, &defines_obstack, &attrs_obstack);
+ copy_comment2 (finput, &defines_obstack, &union_obstack);
break;
case '{':
count--;
if (count <= 0)
{
- obstack_grow_string (&attrs_obstack, " YYSTYPE;\n");
if (defines_flag)
- obstack_grow_string (&defines_obstack, " YYSTYPE;\n");
+ obstack_sgrow (&defines_obstack, epilogue);
/* JF don't choke on trailing semi */
c = skip_white_space ();
if (c != ';')
ungetc (c, finput);
+ obstack_1grow (&union_obstack, 0);
+ muscle_insert ("stype", obstack_finish (&union_obstack));
return;
}
}
c = getc (finput);
}
+
}
static void
parse_thong_decl (void)
{
- int token;
+ token_t token;
struct bucket *symbol;
char *typename = 0;
- int usrtoknum;
+ int usrtoknum = SUNDEF;
- translations = 1;
token = lex (); /* fetch typename or first token */
- if (token == TYPENAME)
+ if (token == tok_typename)
{
typename = xstrdup (token_buffer);
value_components_used = 1;
/* process first token */
- if (token != IDENTIFIER)
+ if (token != tok_identifier)
{
complain (_("unrecognized item %s, expected an identifier"),
token_buffer);
token = lex (); /* get number or literal string */
- if (token == NUMBER)
+ if (token == tok_number)
{
usrtoknum = numval;
token = lex (); /* okay, did number, now get literal */
}
- else
- usrtoknum = 0;
/* process literal string token */
- if (token != IDENTIFIER || *symval->tag != '\"')
+ if (token != tok_identifier || *symval->tag != '\"')
{
complain (_("expected string constant instead of %s"), token_buffer);
skip_to_char ('%');
nsyms--;
}
+static void
+parse_muscle_decl (void)
+{
+ int ch = ungetc (skip_white_space (), finput);
+ char* muscle_key;
+ char* muscle_value;
+
+ /* Read key. */
+ if (!isalpha (ch) && ch != '_')
+ {
+ complain (_("invalid %s declaration"), "%define");
+ skip_to_char ('%');
+ return;
+ }
+ copy_identifier (finput, &muscle_obstack);
+ obstack_1grow (&muscle_obstack, 0);
+ muscle_key = obstack_finish (&muscle_obstack);
+
+ /* Read value. */
+ ch = skip_white_space ();
+ if (ch != '"')
+ {
+ ungetc (ch, finput);
+ if (ch != EOF)
+ {
+ complain (_("invalid %s declaration"), "%define");
+ skip_to_char ('%');
+ return;
+ }
+ else
+ fatal (_("Premature EOF after %s"), "\"");
+ }
+ copy_string2 (finput, &muscle_obstack, '"', 0);
+ obstack_1grow (&muscle_obstack, 0);
+ muscle_value = obstack_finish (&muscle_obstack);
+
+ /* Store the (key, value) pair in the environment. */
+ muscle_insert (muscle_key, muscle_value);
+}
+
+
+/*----------------------------------.
+| Parse what comes after %skeleton. |
+`----------------------------------*/
+
+void
+parse_skel_decl (void)
+{
+ /* Complete with parse_dquoted_param () on the CVS branch 1.29. */
+}
/*----------------------------------------------------------------.
| Read from finput until `%%' is seen. Discard the `%%'. Handle |
static void
read_declarations (void)
{
- int c;
- int tok;
-
for (;;)
{
- c = skip_white_space ();
+ int c = skip_white_space ();
if (c == '%')
{
- tok = parse_percent_token ();
+ token_t tok = parse_percent_token ();
switch (tok)
{
- case TWO_PERCENTS:
+ case tok_two_percents:
return;
- case PERCENT_LEFT_CURLY:
+ case tok_percent_left_curly:
copy_definition ();
break;
- case TOKEN:
+ case tok_token:
parse_token_decl (token_sym, nterm_sym);
break;
- case NTERM:
+ case tok_nterm:
parse_token_decl (nterm_sym, token_sym);
break;
- case TYPE:
+ case tok_type:
parse_type_decl ();
break;
- case START:
+ case tok_start:
parse_start_decl ();
break;
- case UNION:
+ case tok_union:
parse_union_decl ();
break;
- case EXPECT:
+ case tok_expect:
parse_expect_decl ();
break;
- case THONG:
+
+ case tok_thong:
parse_thong_decl ();
break;
- case LEFT:
+ case tok_left:
parse_assoc_decl (left_assoc);
break;
- case RIGHT:
+ case tok_right:
parse_assoc_decl (right_assoc);
break;
- case NONASSOC:
+ case tok_nonassoc:
parse_assoc_decl (non_assoc);
break;
- case SEMANTIC_PARSER:
- semantic_parser = 1;
+ case tok_define:
+ parse_muscle_decl ();
+ break;
+
+ case tok_skel:
+ parse_skel_decl ();
break;
- case PURE_PARSER:
- pure_parser = 1;
+ case tok_noop:
break;
- case NOOP:
+ case tok_stropt:
+ case tok_intopt:
+ case tok_obsolete:
+ abort ();
break;
+ case tok_illegal:
default:
complain (_("unrecognized: %s"), token_buffer);
skip_to_char ('%');
if (semantic_parser)
stack_offset = 0;
- sprintf (buf, "\ncase %d:\n", nrules);
- obstack_grow (&action_obstack, buf, strlen (buf));
+ obstack_fgrow1 (&action_obstack, "\ncase %d:\n", nrules);
if (!no_lines_flag)
{
- sprintf (buf, "#line %d %s\n",
- lineno, quotearg_style (c_quoting_style, infile));
- obstack_grow (&action_obstack, buf, strlen (buf));
+ obstack_fgrow2 (&action_obstack, muscle_find ("linef"),
+ lineno, quotearg_style (c_quoting_style,
+ muscle_find ("filename")));
}
obstack_1grow (&action_obstack, '{');
case '\'':
case '"':
- copy_string (finput, 0, &action_obstack, c);
+ copy_string (finput, &action_obstack, c);
break;
case '/':
- copy_comment (finput, 0, &action_obstack);
+ copy_comment (finput, &action_obstack);
break;
case '$':
- copy_dollar (finput, 0, &action_obstack,
+ copy_dollar (finput, &action_obstack,
rule, stack_offset);
break;
case '@':
- copy_at (finput, 0, &action_obstack,
+ copy_at (finput, &action_obstack,
stack_offset);
break;
}
}
- obstack_grow_string (&action_obstack, ";\n break;}");
+ obstack_sgrow (&action_obstack, ";\n break;}");
}
\f
/*-------------------------------------------------------------------.
obstack_fgrow1 (&guard_obstack, "\ncase %d:\n", nrules);
if (!no_lines_flag)
- obstack_fgrow2 (&guard_obstack, "#line %d %s\n",
- lineno, quotearg_style (c_quoting_style, infile));
+ obstack_fgrow2 (&guard_obstack, muscle_find ("linef"),
+ lineno, quotearg_style (c_quoting_style,
+ muscle_find ("filename")));
obstack_1grow (&guard_obstack, '{');
count = 0;
case '\'':
case '"':
- copy_string (finput, 0, &guard_obstack, c);
+ copy_string (finput, &guard_obstack, c);
break;
case '/':
- copy_comment (finput, 0, &guard_obstack);
+ copy_comment (finput, &guard_obstack);
break;
case '$':
- copy_dollar (finput, 0, &guard_obstack, rule, stack_offset);
+ copy_dollar (finput, &guard_obstack, rule, stack_offset);
break;
case '@':
- copy_at (finput, 0, &guard_obstack, stack_offset);
+ copy_at (finput, &guard_obstack, stack_offset);
break;
case EOF:
c = skip_white_space ();
- obstack_grow_string (&guard_obstack, ";\n break;}");
+ obstack_sgrow (&guard_obstack, ";\n break;}");
if (c == '{')
copy_action (rule, stack_offset);
else if (c == '=')
}
\f
-static void
-record_rule_line (void)
-{
- /* Record each rule's source line number in rline table. */
-
- if (nrules >= rline_allocated)
- {
- rline_allocated = nrules * 2;
- rline = XREALLOC (rline, short, rline_allocated);
- }
- rline[nrules] = lineno;
-}
-
-
/*-------------------------------------------------------------------.
| Generate a dummy symbol, a nonterminal, whose name cannot conflict |
| with the user's names. |
static bucket *
gensym (void)
{
+ /* Incremented for each generated symbol */
+ static int gensym_count = 0;
+ static char buf[256];
+
bucket *sym;
- sprintf (token_buffer, "@%d", ++gensym_count);
+ sprintf (buf, "@%d", ++gensym_count);
+ token_buffer = buf;
sym = getsym (token_buffer);
sym->class = nterm_sym;
sym->value = nvars++;
get_type (void)
{
int k;
- int t;
+ token_t token;
char *name;
- t = lex ();
+ token = lex ();
- if (t != TYPENAME)
+ if (token != tok_typename)
{
complain (_("invalid %s declaration"), "%type");
return t;
for (;;)
{
- t = lex ();
+ token = lex ();
- switch (t)
+ switch (token)
{
- case SEMICOLON:
+ case tok_semicolon:
return lex ();
- case COMMA:
+ case tok_comma:
break;
- case IDENTIFIER:
+ case tok_identifier:
if (symval->type_name == NULL)
symval->type_name = name;
else if (strcmp (name, symval->type_name) != 0)
break;
default:
- return t;
+ return token;
}
}
}
static void
readgram (void)
{
- int t;
+ token_t t;
bucket *lhs = NULL;
symbol_list *p;
symbol_list *p1;
t = lex ();
- while (t != TWO_PERCENTS && t != ENDFILE)
+ while (t != tok_two_percents && t != tok_eof)
{
- if (t == IDENTIFIER || t == BAR)
+ if (t == tok_identifier || t == tok_bar)
{
int action_flag = 0;
/* Number of symbols in rhs of this rule so far */
int xactions = 0; /* JF for error checking */
bucket *first_rhs = 0;
- if (t == IDENTIFIER)
+ if (t == tok_identifier)
{
lhs = symval;
}
t = lex ();
- if (t != COLON)
+ if (t != tok_colon)
{
complain (_("ill-formed rule: initial symbol not followed by colon"));
unlex (t);
}
}
- if (nrules == 0 && t == BAR)
+ if (nrules == 0 && t == tok_bar)
{
complain (_("grammar starts with vertical bar"));
lhs = symval; /* BOGUS: use a random symval */
nrules++;
nitems++;
- record_rule_line ();
-
- p = XCALLOC (symbol_list, 1);
- p->sym = lhs;
+ p = symbol_list_new (lhs);
crule1 = p1;
if (p1)
for (;;)
{
t = lex ();
- if (t == PREC)
+ if (t == tok_prec)
{
t = lex ();
crule->ruleprec = symval;
t = lex ();
}
- if (!(t == IDENTIFIER || t == LEFT_CURLY))
+ if (!(t == tok_identifier || t == tok_left_curly))
break;
/* If next token is an identifier, see if a colon follows it.
If one does, exit this rule now. */
- if (t == IDENTIFIER)
+ if (t == tok_identifier)
{
bucket *ssave;
- int t1;
+ token_t t1;
ssave = symval;
t1 = lex ();
unlex (t1);
symval = ssave;
- if (t1 == COLON)
+ if (t1 == tok_colon)
break;
if (!first_rhs) /* JF */
non-terminal. */
if (action_flag)
{
- bucket *sdummy;
-
/* Since the action was written out with this rule's
number, we must give the new rule this number by
inserting the new rule before it. */
/* Make a dummy nonterminal, a gensym. */
- sdummy = gensym ();
+ bucket *sdummy = gensym ();
/* Make a new rule, whose body is empty,
before the current one, so that the action
just read can belong to it. */
nrules++;
nitems++;
- record_rule_line ();
- p = XCALLOC (symbol_list, 1);
+ p = symbol_list_new (sdummy);
if (crule1)
crule1->next = p;
else
grammar = p;
- p->sym = sdummy;
- crule1 = XCALLOC (symbol_list, 1);
- p->next = crule1;
+ /* End of the rule. */
+ crule1 = symbol_list_new (NULL);
crule1->next = crule;
+ p->next = crule1;
+
/* Insert the dummy generated by that rule into this
rule. */
nitems++;
- p = XCALLOC (symbol_list, 1);
- p->sym = sdummy;
+ p = symbol_list_new (sdummy);
p1->next = p;
p1 = p;
action_flag = 0;
}
- if (t == IDENTIFIER)
+ if (t == tok_identifier)
{
nitems++;
- p = XCALLOC (symbol_list, 1);
- p->sym = symval;
+ p = symbol_list_new (symval);
p1->next = p;
p1 = p;
}
} /* end of read rhs of rule */
/* Put an empty link in the list to mark the end of this rule */
- p = XCALLOC (symbol_list, 1);
+ p = symbol_list_new (NULL);
p1->next = p;
p1 = p;
- if (t == PREC)
+ if (t == tok_prec)
{
complain (_("two @prec's in a row"));
t = lex ();
crule->ruleprec = symval;
t = lex ();
}
- if (t == GUARD)
+ if (t == tok_guard)
{
if (!semantic_parser)
complain (_("%%guard present but %%semantic_parser not specified"));
copy_guard (crule, rulelength);
t = lex ();
}
- else if (t == LEFT_CURLY)
+ else if (t == tok_left_curly)
{
/* This case never occurs -wjh */
if (action_flag)
/* Warn if there is no default for $$ but we need one. */
else if (!xactions && !first_rhs && lhs->type_name != 0)
complain (_("empty rule for typed nonterminal, and no action"));
- if (t == SEMICOLON)
+ if (t == tok_semicolon)
t = lex ();
}
#if 0
b) most of them scan forward until finding a next %
thus they may swallow lots of intervening rules
*/
- else if (t == TOKEN)
+ else if (t == tok_token)
{
parse_token_decl (token_sym, nterm_sym);
t = lex ();
}
- else if (t == NTERM)
+ else if (t == tok_nterm)
{
parse_token_decl (nterm_sym, token_sym);
t = lex ();
}
- else if (t == TYPE)
+ else if (t == tok_type)
{
t = get_type ();
}
- else if (t == UNION)
+ else if (t == tok_union)
{
parse_union_decl ();
t = lex ();
}
- else if (t == EXPECT)
+ else if (t == tok_expect)
{
parse_expect_decl ();
t = lex ();
}
- else if (t == START)
+ else if (t == tok_start)
{
parse_start_decl ();
t = lex ();
else
{
- complain (_("invalid input: %s"), token_buffer);
+ complain (_("invalid input: %s"), quote (token_buffer));
t = lex ();
}
}
if (nrules == 0)
fatal (_("no rules in the input grammar"));
- /* JF put out same default YYSTYPE as YACC does */
- if (typed == 0
- && !value_components_used)
- {
- /* We used to use `unsigned long' as YYSTYPE on MSDOS,
- but it seems better to be consistent.
- Most programs should declare their own type anyway. */
- obstack_grow_string (&attrs_obstack,
- "#ifndef YYSTYPE\n#define YYSTYPE int\n#endif\n");
- if (defines_flag)
- obstack_grow_string (&defines_obstack, "\
-#ifndef YYSTYPE\n\
-# define YYSTYPE int\n\
-#endif\n");
- }
-
/* Report any undefined symbols and consider them nonterminals. */
for (bp = firstsymbol; bp; bp = bp->next)
ntokens = nsyms - nvars;
}
+
+/* At the end of the grammar file, some C source code must
+ be stored. It is going to be associated to the epilogue
+ directive. */
+static void
+read_additionnal_code (void)
+{
+ char c;
+ struct obstack el_obstack;
+
+ obstack_init (&el_obstack);
+
+ while ((c = getc (finput)) != EOF)
+ obstack_1grow (&el_obstack, c);
+
+ obstack_1grow (&el_obstack, 0);
+ muscle_insert ("epilogue", obstack_finish (&el_obstack));
+}
+
\f
/*--------------------------------------------------------------.
| For named tokens, but not literal ones, define the name. The |
if (c != '\0')
continue;
- obstack_fgrow2 (oout, "#define\t%s\t%d\n",
- symbol,
- ((translations && !raw_flag)
- ? bp->user_token_number : bp->value));
+ obstack_fgrow2 (oout, "# define\t%s\t%d\n",
+ symbol, bp->user_token_number);
if (semantic_parser)
- obstack_fgrow2 (oout, "#define\tT%s\t%d\n", symbol, bp->value);
+ /* FIXME: This is certainly dead wrong, and should be just as
+ above. --akim. */
+ obstack_fgrow2 (oout, "# define\tT%s\t%d\n", symbol, bp->value);
}
+}
+
+
+/*------------------------------------------------------------------.
+| Set TOKEN_TRANSLATIONS. Check that no two symbols share the same |
+| number. |
+`------------------------------------------------------------------*/
+
+static void
+token_translations_init (void)
+{
+ bucket *bp = NULL;
+ int i;
+
+ token_translations = XCALLOC (short, max_user_token_number + 1);
- obstack_1grow (oout, '\n');
+ /* Initialize all entries for literal tokens to 2, the internal
+ token number for $undefined., which represents all invalid
+ inputs. */
+ for (i = 0; i <= max_user_token_number; i++)
+ token_translations[i] = 2;
+
+ for (bp = firstsymbol; bp; bp = bp->next)
+ {
+ /* Non-terminal? */
+ if (bp->value >= ntokens)
+ continue;
+ /* A token string alias? */
+ if (bp->user_token_number == SALIAS)
+ continue;
+
+ assert (bp->user_token_number != SUNDEF);
+
+ /* A token which translation has already been set? */
+ if (token_translations[bp->user_token_number] != 2)
+ complain (_("tokens %s and %s both assigned number %d"),
+ tags[token_translations[bp->user_token_number]],
+ bp->tag, bp->user_token_number);
+ token_translations[bp->user_token_number] = bp->value;
+ }
}
static void
packsymbols (void)
{
- bucket *bp;
+ bucket *bp = NULL;
int tokno = 1;
- int i;
int last_user_token_number;
static char DOLLAR[] = "$";
- /* int lossage = 0; JF set but not used */
-
tags = XCALLOC (char *, nsyms + 1);
- tags[0] = DOLLAR;
user_toknums = XCALLOC (short, nsyms + 1);
- user_toknums[0] = 0;
sprec = XCALLOC (short, nsyms);
sassoc = XCALLOC (short, nsyms);
+ /* The EOF token. */
+ tags[0] = DOLLAR;
+ user_toknums[0] = 0;
+
max_user_token_number = 256;
last_user_token_number = 256;
if (bp->class == token_sym)
{
- if (translations && !(bp->user_token_number))
+ if (bp->user_token_number == SUNDEF)
bp->user_token_number = ++last_user_token_number;
if (bp->user_token_number > max_user_token_number)
max_user_token_number = bp->user_token_number;
user_toknums[bp->value] = bp->user_token_number;
sprec[bp->value] = bp->prec;
sassoc[bp->value] = bp->assoc;
-
}
- if (translations)
- {
- int j;
-
- token_translations = XCALLOC (short, max_user_token_number + 1);
-
- /* initialize all entries for literal tokens to 2, the internal
- token number for $undefined., which represents all invalid
- inputs. */
- for (j = 0; j <= max_user_token_number; j++)
- token_translations[j] = 2;
-
- for (bp = firstsymbol; bp; bp = bp->next)
- {
- if (bp->value >= ntokens)
- continue; /* non-terminal */
- if (bp->user_token_number == SALIAS)
- continue;
- if (token_translations[bp->user_token_number] != 2)
- complain (_("tokens %s and %s both assigned number %d"),
- tags[token_translations[bp->user_token_number]],
- bp->tag, bp->user_token_number);
- token_translations[bp->user_token_number] = bp->value;
- }
- }
+ token_translations_init ();
error_token_number = errtoken->value;
- if (!no_parser_flag)
- output_token_defines (&table_obstack);
-
if (startval->class == unknown_sym)
fatal (_("the start symbol %s is undefined"), startval->tag);
else if (startval->class == token_sym)
fatal (_("the start symbol %s is a token"), startval->tag);
start_symbol = startval->value;
+}
+
+
+/*-----------------------------------.
+| Output definition of token names. |
+`-----------------------------------*/
+
+static void
+symbols_output (void)
+{
+ {
+ struct obstack tokendefs;
+ obstack_init (&tokendefs);
+ output_token_defines (&tokendefs);
+ obstack_1grow (&tokendefs, 0);
+ muscle_insert ("tokendef", xstrdup (obstack_finish (&tokendefs)));
+ obstack_free (&tokendefs, NULL);
+ }
+
+#if 0
+ if (!no_parser_flag)
+ output_token_defines (&table_obstack);
+#endif
if (defines_flag)
{
obstack_fgrow1 (&defines_obstack, "\nextern YYSTYPE %slval;\n",
spec_name_prefix);
else
- obstack_grow_string (&defines_obstack,
+ obstack_sgrow (&defines_obstack,
"\nextern YYSTYPE yylval;\n");
}
if (semantic_parser)
- for (i = ntokens; i < nsyms; i++)
- {
- /* don't make these for dummy nonterminals made by gensym. */
- if (*tags[i] != '@')
- obstack_fgrow2 (&defines_obstack,
- "#define\tNT%s\t%d\n", tags[i], i);
- }
+ {
+ int i;
+
+ for (i = ntokens; i < nsyms; i++)
+ {
+ /* don't make these for dummy nonterminals made by gensym. */
+ if (*tags[i] != '@')
+ obstack_fgrow2 (&defines_obstack,
+ "# define\tNT%s\t%d\n", tags[i], i);
+ }
#if 0
- /* `fdefines' is now a temporary file, so we need to copy its
- contents in `done', so we can't close it here. */
- fclose (fdefines);
- fdefines = NULL;
+ /* `fdefines' is now a temporary file, so we need to copy its
+ contents in `done', so we can't close it here. */
+ fclose (fdefines);
+ fdefines = NULL;
#endif
+ }
}
}
int ruleno;
symbol_list *p;
- bucket *ruleprec;
-
ritem = XCALLOC (short, nitems + 1);
- rlhs = XCALLOC (short, nrules) - 1;
- rrhs = XCALLOC (short, nrules) - 1;
- rprec = XCALLOC (short, nrules) - 1;
- rprecsym = XCALLOC (short, nrules) - 1;
- rassoc = XCALLOC (short, nrules) - 1;
+ rule_table = XCALLOC (rule_t, nrules) - 1;
itemno = 0;
ruleno = 1;
p = grammar;
while (p)
{
- rlhs[ruleno] = p->sym->value;
- rrhs[ruleno] = itemno;
- ruleprec = p->ruleprec;
+ bucket *ruleprec = p->ruleprec;
+ rule_table[ruleno].lhs = p->sym->value;
+ rule_table[ruleno].rhs = itemno;
+ rule_table[ruleno].line = p->line;
p = p->next;
while (p && p->sym)
of the last token in it. */
if (p->sym->class == token_sym)
{
- rprec[ruleno] = p->sym->prec;
- rassoc[ruleno] = p->sym->assoc;
+ rule_table[ruleno].prec = p->sym->prec;
+ rule_table[ruleno].assoc = p->sym->assoc;
}
if (p)
p = p->next;
the specified symbol's precedence replaces the default. */
if (ruleprec)
{
- rprec[ruleno] = ruleprec->prec;
- rassoc[ruleno] = ruleprec->assoc;
- rprecsym[ruleno] = ruleprec->value;
+ rule_table[ruleno].prec = ruleprec->prec;
+ rule_table[ruleno].assoc = ruleprec->assoc;
+ rule_table[ruleno].precsym = ruleprec->value;
}
ritem[itemno++] = -ruleno;
start_flag = 0;
startval = NULL; /* start symbol not specified yet. */
-#if 0
- /* initially assume token number translation not needed. */
- translations = 0;
-#endif
- /* Nowadays translations is always set to 1, since we give `error' a
- user-token-number to satisfy the Posix demand for YYERRCODE==256.
- */
- translations = 1;
-
nsyms = 1;
nvars = 0;
nrules = 0;
nitems = 0;
- rline_allocated = 10;
- rline = XCALLOC (short, rline_allocated);
typed = 0;
lastprec = 0;
- gensym_count = 0;
-
semantic_parser = 0;
pure_parser = 0;
grammar = NULL;
- init_lex ();
+ lex_init ();
lineno = 1;
+ /* Initialize the muscle obstack. */
+ obstack_init (&muscle_obstack);
+
/* Initialize the symbol table. */
tabinit ();
+
/* Construct the error token */
errtoken = getsym ("error");
errtoken->class = token_sym;
errtoken->user_token_number = 256; /* Value specified by POSIX. */
+
/* Construct a token that represents all undefined literal tokens.
It is always token number 2. */
undeftoken = getsym ("$undefined.");
/* Read the declaration section. Copy %{ ... %} groups to
TABLE_OBSTACK and FDEFINES file. Also notice any %token, %left,
etc. found there. */
- obstack_1grow (&table_obstack, '\n');
- obstack_fgrow3 (&table_obstack, "\
-/* %s, made from %s\n\
- by GNU bison %s. */\n\
-\n",
- no_parser_flag ? "Bison-generated parse tables" : "A Bison parser",
- infile, VERSION);
-
- obstack_grow_string (&table_obstack,
- "#define YYBISON 1 /* Identify Bison output. */\n\n");
read_declarations ();
- /* Start writing the guard and action files, if they are needed. */
- output_headers ();
/* Read in the grammar, build grammar in list form. Write out
guards and actions. */
readgram ();
+ /* Some C code is given at the end of the grammar file. */
+ read_additionnal_code ();
+
/* Now we know whether we need the line-number stack. If we do,
- write its type into the .tab.h file. */
- if (defines_flag)
- reader_output_yylsp (&defines_obstack);
- /* Write closing delimiters for actions and guards. */
- output_trailers ();
- if (locations_flag)
- obstack_grow_string (&table_obstack, "#define YYLSP_NEEDED 1\n\n");
+ write its type into the .tab.h file.
+ This is no longer need with header skeleton. */
+
/* Assign the symbols their symbol numbers. Write #defines for the
token symbols into FDEFINES if requested. */
packsymbols ();
+ symbols_output ();
/* Convert the grammar into the format described in gram.h. */
packgram ();
- /* Free the symbol table data structure since symbols are now all
- referred to by symbol number. */
- free_symtab ();
-}
-
-
-/*------------------------------------------------------------------.
-| Define YYLTYPE. Cannot be in the skeleton since we might have to |
-| output it in the headers if --defines is used. |
-`------------------------------------------------------------------*/
-
-void
-reader_output_yylsp (struct obstack *oout)
-{
- if (locations_flag)
- obstack_grow_string (oout, "\
-\n\
-#ifndef YYLTYPE\n\
-typedef struct yyltype\n\
-{\n\
- int first_line;\n\
- int first_column;\n\
-\n\
- int last_line;\n\
- int last_column;\n\
-} yyltype;\n\
-\n\
-# define YYLTYPE yyltype\n\
-#endif\n\
-\n");
+ /* Output the headers. */
+ symbols_output ();
}
projects / bison.git / blobdiff