/* Input parser for bison
- Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc.
+ Copyright (C) 1984, 1986, 1989, 1992 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
extern char *program_name;
extern int definesflag;
extern int nolinesflag;
+extern int noparserflag;
+extern int rawtoknumflag;
extern bucket *symval;
extern int numval;
-extern int failure;
extern int expected_conflicts;
extern char *token_buffer;
extern void output_trailers();
extern void free_symtab();
extern void open_extra_files();
+extern char *int_to_string();
extern void fatal();
extern void fatals();
+extern void warn();
+extern void warni();
+extern void warns();
+extern void warnss();
+extern void warnsss();
extern void unlex();
extern void done();
extern int parse_percent_token();
extern int lex();
+void reader_output_yylsp();
void read_declarations();
void copy_definition();
void parse_token_decl();
void parse_assoc_decl();
void parse_union_decl();
void parse_expect_decl();
+void parse_thong_decl();
void copy_action();
void readgram();
void record_rule_line();
void output_token_defines();
void packgram();
int read_signed_integer();
-int get_type();
+static int get_type();
typedef
struct symbol_list
int start_flag;
bucket *startval;
char **tags;
+int *user_toknums;
/* Nonzero if components of semantic values are used, implying
they must be unions. */
extern char *version_string;
+
+static void
+skip_to_char(target)
+ int target;
+{
+ int c;
+ if (target == '\n')
+ warn(" Skipping to next \\n");
+ else
+ warni(" Skipping to next %c", target);
+
+ do
+ c = skip_white_space();
+ while (c != target && c != EOF);
+ if (c != EOF)
+ ungetc(c, finput);
+}
+
+
void
reader()
{
errtoken->user_token_number = 256; /* Value specified by posix. */
/* construct a token that represents all undefined literal tokens. */
/* it is always token number 2. */
- getsym("$illegal.")->class = STOKEN;
+ getsym("$undefined.")->class = STOKEN;
/* Read the declaration section. Copy %{ ... %} groups to ftable and fdefines file.
Also notice any %token, %left, etc. found there. */
- fprintf(ftable, "\n/* A Bison parser, made from %s", infile);
- fprintf(ftable, " with Bison version %s */\n\n", version_string);
+ if (noparserflag)
+ fprintf(ftable, "\n/* Bison-generated parse tables, made from %s\n",
+ infile);
+ else
+ fprintf(ftable, "\n/* A Bison parser, made from %s\n", infile);
+ fprintf(ftable, " by %s */\n\n", version_string);
fprintf(ftable, "#define YYBISON 1 /* Identify Bison output. */\n\n");
read_declarations();
- /* output the definition of YYLTYPE into the fattrs and fdefines files. */
- /* fattrs winds up in the .tab.c file, before bison.simple. */
- fprintf(fattrs, LTYPESTR);
/* 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();
/* Now we know whether we need the line-number stack.
If we do, write its type into the .tab.h file. */
- if (yylsp_needed)
- {
- if (fdefines)
- fprintf(fdefines, LTYPESTR);
- }
+ if (fdefines)
+ reader_output_yylsp(fdefines);
/* write closing delimiters for actions and guards. */
output_trailers();
if (yylsp_needed)
free_symtab();
}
-
+void
+reader_output_yylsp(f)
+ FILE *f;
+{
+ if (yylsp_needed)
+ fprintf(f, LTYPESTR);
+}
/* read from finput until %% is seen. Discard the %%.
Handle any % declarations,
case EXPECT:
parse_expect_decl();
break;
-
+ case THONG:
+ parse_thong_decl();
+ break;
case LEFT:
parse_assoc_decl(LEFT_ASSOC);
break;
pure_parser = 1;
break;
+ case NOOP:
+ break;
+
default:
- fatal("junk after `%%' in definition section");
- }
+ warns("unrecognized: %s", token_buffer);
+ skip_to_char('%');
+ }
}
else if (c == EOF)
fatal("no input grammar");
- else if (c >= 040 && c <= 0177)
- fatals ("unknown character `%c' in declaration section", c);
else
- fatals ("unknown character with code 0x%x in declaration section", c);
+ {
+ char buff[100];
+ sprintf(buff, "unknown character: %s", printable_version(c));
+ warn(buff);
+ skip_to_char('%');
+ }
}
}
while (c != match)
{
- if (c == EOF || c == '\n')
- fatal("unterminated string");
+ if (c == EOF)
+ fatal("unterminated string at end of file");
+ if (c == '\n')
+ {
+ warn("unterminated string");
+ ungetc(c, finput);
+ c = match;
+ continue;
+ }
putc(c, fattrs);
{
c = getc(finput);
if (c == EOF)
- fatal("unterminated string");
+ fatal("unterminated string at end of file");
putc(c, fattrs);
if (c == '\n')
lineno++;
parse_token_decl (what_is, what_is_not)
int what_is, what_is_not;
{
-/* register int start_lineno; JF */
register int token = 0;
- register int prev;
register char *typename = 0;
+ register struct bucket *symbol = NULL; /* pts to symbol being defined */
int k;
-/* start_lineno = lineno; JF */
-
for (;;)
{
if(ungetc(skip_white_space(), finput) == '%')
return;
-
-/* if (lineno != start_lineno)
- return; JF */
-
- /* we have not passed a newline, so the token now starting is in this declaration */
- prev = token;
-
token = lex();
if (token == COMMA)
- continue;
+ {
+ symbol = NULL;
+ continue;
+ }
if (token == TYPENAME)
{
k = strlen(token_buffer);
typename = NEW2(k + 1, char);
strcpy(typename, token_buffer);
value_components_used = 1;
+ symbol = NULL;
+ }
+ else if (token == IDENTIFIER && *symval->tag == '\"'
+ && symbol)
+ {
+ translations = 1;
+ symval->class = STOKEN;
+ symval->type_name = typename;
+ symval->user_token_number = symbol->user_token_number;
+ symbol->user_token_number = SALIAS;
+
+ symval->alias = symbol;
+ symbol->alias = symval;
+ symbol = NULL;
+
+ nsyms--; /* symbol and symval combined are only one symbol */
}
else if (token == IDENTIFIER)
{
int oldclass = symval->class;
+ symbol = symval;
- if (symval->class == what_is_not)
- fatals("symbol %s redefined", symval->tag);
- symval->class = what_is;
+ if (symbol->class == what_is_not)
+ warns("symbol %s redefined", symbol->tag);
+ symbol->class = what_is;
if (what_is == SNTERM && oldclass != SNTERM)
- symval->value = nvars++;
+ symbol->value = nvars++;
if (typename)
{
- if (symval->type_name == NULL)
- symval->type_name = typename;
- else
- fatals("type redeclaration for %s", symval->tag);
+ if (symbol->type_name == NULL)
+ symbol->type_name = typename;
+ else if (strcmp(typename, symbol->type_name) != 0)
+ warns("type redeclaration for %s", symbol->tag);
}
}
- else if (prev == IDENTIFIER && token == NUMBER)
+ else if (symbol && token == NUMBER)
{
- symval->user_token_number = numval;
+ symbol->user_token_number = numval;
translations = 1;
}
else
- fatal("invalid text in %token or %nterm declaration");
+ {
+ warnss("`%s' is invalid in %s",
+ token_buffer,
+ (what_is == STOKEN) ? "%token" : "%nterm");
+ skip_to_char('%');
+ }
}
}
+/* parse what comes after %thong
+ the full syntax is
+ %thong <type> token number literal
+ the <type> or number may be omitted. The number specifies the
+ user_token_number.
+
+ Two symbols are entered in the table, one for the token symbol and
+ one for the literal. Both are given the <type>, if any, from the declaration.
+ The ->user_token_number of the first is SALIAS and the ->user_token_number
+ of the second is set to the number, if any, from the declaration.
+ The two symbols are linked via pointers in their ->alias fields.
+
+ during output_defines_table, the symbol is reported
+ thereafter, only the literal string is retained
+ it is the literal string that is output to yytname
+*/
+
+void
+parse_thong_decl ()
+{
+ register int token;
+ register struct bucket *symbol;
+ register char *typename = 0;
+ int k, usrtoknum;
+
+ translations = 1;
+ token = lex(); /* fetch typename or first token */
+ if (token == TYPENAME) {
+ k = strlen(token_buffer);
+ typename = NEW2(k + 1, char);
+ strcpy(typename, token_buffer);
+ value_components_used = 1;
+ token = lex(); /* fetch first token */
+ }
+
+ /* process first token */
+
+ if (token != IDENTIFIER)
+ {
+ warns("unrecognized item %s, expected an identifier",
+ token_buffer);
+ skip_to_char('%');
+ return;
+ }
+ symval->class = STOKEN;
+ symval->type_name = typename;
+ symval->user_token_number = SALIAS;
+ symbol = symval;
+
+ token = lex(); /* get number or literal string */
+
+ if (token == NUMBER) {
+ usrtoknum = numval;
+ token = lex(); /* okay, did number, now get literal */
+ }
+ else usrtoknum = 0;
+
+ /* process literal string token */
+
+ if (token != IDENTIFIER || *symval->tag != '\"')
+ {
+ warns("expected string constant instead of %s",
+ token_buffer);
+ skip_to_char('%');
+ return;
+ }
+ symval->class = STOKEN;
+ symval->type_name = typename;
+ symval->user_token_number = usrtoknum;
+
+ symval->alias = symbol;
+ symbol->alias = symval;
+
+ nsyms--; /* symbol and symval combined are only one symbol */
+}
/* parse what comes after %start */
parse_start_decl ()
{
if (start_flag)
- fatal("multiple %start declarations");
- start_flag = 1;
+ warn("multiple %start declarations");
if (lex() != IDENTIFIER)
- fatal("invalid %start declaration");
- startval = symval;
+ warn("invalid %start declaration");
+ else
+ {
+ start_flag = 1;
+ startval = symval;
+ }
}
{
register int k;
register char *name;
-/* register int start_lineno; JF */
if (lex() != TYPENAME)
- fatal("ill-formed %type declaration");
+ {
+ warn("%type declaration has no <typename>");
+ skip_to_char('%');
+ return;
+ }
k = strlen(token_buffer);
name = NEW2(k + 1, char);
strcpy(name, token_buffer);
-/* start_lineno = lineno; */
-
for (;;)
{
register int t;
if(ungetc(skip_white_space(), finput) == '%')
return;
-/* if (lineno != start_lineno)
- return; JF */
-
- /* we have not passed a newline, so the token now starting is in this declaration */
-
t = lex();
switch (t)
case IDENTIFIER:
if (symval->type_name == NULL)
symval->type_name = name;
- else
- fatals("type redeclaration for %s", symval->tag);
+ else if (strcmp(name, symval->type_name) != 0)
+ warns("type redeclaration for %s", symval->tag);
break;
default:
- fatal("invalid %type declaration");
+ warns("invalid %%type declaration due to item: `%s'", token_buffer);
+ skip_to_char('%');
}
}
}
{
register int k;
register char *name = NULL;
-/* register int start_lineno; JF */
- register int prev = 0; /* JF added = 0 to keep lint happy */
+ register int prev = 0;
lastprec++; /* Assign a new precedence level, never 0. */
-/* start_lineno = lineno; */
-
for (;;)
{
register int t;
if(ungetc(skip_white_space(), finput) == '%')
return;
- /* if (lineno != start_lineno)
- return; JF */
-
- /* we have not passed a newline, so the token now starting is in this declaration */
-
t = lex();
switch (t)
case IDENTIFIER:
if (symval->prec != 0)
- fatals("redefining precedence of %s", symval->tag);
+ warns("redefining precedence of %s", symval->tag);
symval->prec = lastprec;
symval->assoc = assoc;
if (symval->class == SNTERM)
- fatals("symbol %s redefined", symval->tag);
+ warns("symbol %s redefined", symval->tag);
symval->class = STOKEN;
if (name)
{ /* record the type, if one is specified */
if (symval->type_name == NULL)
symval->type_name = name;
- else
- fatals("type redeclaration for %s", symval->tag);
+ else if (strcmp(name, symval->type_name) != 0)
+ warns("type redeclaration for %s", symval->tag);
}
break;
translations = 1;
}
else
- fatal("invalid text in association declaration");
+ {
+ warns("invalid text (%s) - number should be after identifier",
+ token_buffer);
+ skip_to_char('%');
+ }
break;
case SEMICOLON:
return;
default:
- fatal("malformatted association declaration");
+ warns("unexpected item: %s", token_buffer);
+ skip_to_char('%');
}
prev = t;
int cplus_comment;
if (typed)
- fatal("multiple %union declarations");
+ warn("multiple %union declarations");
typed = 1;
}
}
if (c == EOF)
- fatal("unterminated comment");
+ fatal("unterminated comment at end of file");
if (!cplus_comment && c == '*')
{
case '}':
if (count == 0)
- fatal ("unmatched close-brace (`}')");
+ warn ("unmatched close-brace (`}')");
count--;
- if (count == 0)
+ if (count <= 0)
{
fprintf(fattrs, " YYSTYPE;\n");
if (fdefines)
ungetc (c, finput);
+ if (count <= 0 || count > 10)
+ warn("argument of %expect is not an integer");
expected_conflicts = atoi (buffer);
}
register symbol_list *rp;
if (n < 0)
- fatal(msg);
+ {
+ warn(msg);
+ return NULL;
+ }
rp = rule;
i = 0;
{
rp = rp->next;
if (rp == NULL || rp->sym == NULL)
- fatal(msg);
+ {
+ warn(msg);
+ return NULL;
+ }
i++;
}
}
-
/* after %guard is seen in the input file,
copy the actual guard into the guards file.
If the guard is followed by an action, copy that into the actions file.
putc(c, fguard);
if (count > 0)
count--;
- else
- fatal("unmatched right brace ('}')");
+ else
+ {
+ warn("unmatched right brace (`}')");
+ c = getc(finput); /* skip it */
+ }
break;
case '\'':
while (c != match)
{
- if (c == EOF || c == '\n')
- fatal("unterminated string");
+ if (c == EOF)
+ fatal("unterminated string at end of file");
+ if (c == '\n')
+ {
+ warn("unterminated string");
+ ungetc(c, finput);
+ c = match; /* invent terminator */
+ continue;
+ }
putc(c, fguard);
if (!type_name) type_name = rule->sym->type_name;
if (type_name)
fprintf(fguard, ".%s", type_name);
- if(!type_name && typed) /* JF */
- fprintf(stderr,"%s:%d: warning: $$ of '%s' has no declared type.\n",infile,lineno,rule->sym->tag);
+ if(!type_name && typed)
+ warns("$$ of `%s' has no declared type", rule->sym->tag);
}
else if (isdigit(c) || c == '-')
fprintf(fguard, "yyvsp[%d]", n - stack_offset);
if (type_name)
fprintf(fguard, ".%s", type_name);
- if(!type_name && typed) /* JF */
- fprintf(stderr,"%s:%d: warning: $%d of '%s' has no declared type.\n",infile,lineno,n,rule->sym->tag);
+ if(!type_name && typed)
+ warnss("$%s of `%s' has no declared type", int_to_string(n), rule->sym->tag);
continue;
}
else
- fatals("$%c is invalid",c); /* JF changed style */
+ warni("$%s is invalid", printable_version(c));
break;
c = getc(finput);
}
else
- fatals("@%c is invalid",c); /* JF changed style */
+ {
+ warni("@%s is invalid", printable_version(c));
+ n = 1;
+ }
fprintf(fguard, "yylsp[%d]", n - stack_offset);
yylsp_needed = 1;
continue;
case EOF:
- fatal("unterminated %guard clause");
+ fatal("unterminated %%guard clause");
default:
putc(c, fguard);
copy_action(rule, stack_offset);
else if (c == '=')
{
- c = getc(finput);
+ c = getc(finput); /* why not skip_white_space -wjh */
if (c == '{')
copy_action(rule, stack_offset);
}
while (c != match)
{
- if (c == EOF || c == '\n')
- fatal("unterminated string");
+ if (c == '\n')
+ {
+ warn("unterminated string");
+ ungetc(c, finput);
+ c = match;
+ continue;
+ }
+ else if (c == EOF)
+ fatal("unterminated string at end of file");
putc(c, faction);
if (!type_name) type_name = get_type_name(0, rule);
if (type_name)
fprintf(faction, ".%s", type_name);
- if(!type_name && typed) /* JF */
- fprintf(stderr,"%s:%d: warning: $$ of '%s' has no declared type.\n",infile,lineno,rule->sym->tag);
+ if(!type_name && typed)
+ warns("$$ of `%s' has no declared type", rule->sym->tag);
}
else if (isdigit(c) || c == '-')
{
fprintf(faction, "yyvsp[%d]", n - stack_offset);
if (type_name)
fprintf(faction, ".%s", type_name);
- if(!type_name && typed) /* JF */
- fprintf(stderr,"%s:%d: warning: $%d of '%s' has no declared type.\n",infile,lineno,n,rule->sym->tag);
+ if(!type_name && typed)
+ warnss("$%s of `%s' has no declared type",
+ int_to_string(n), rule->sym->tag);
continue;
}
else
- fatals("$%c is invalid",c); /* JF changed format */
+ warni("$%s is invalid", printable_version(c));
break;
c = getc(finput);
}
else
- fatal("invalid @-construct");
+ {
+ warn("invalid @-construct");
+ n = 1;
+ }
fprintf(faction, "yylsp[%d]", n - stack_offset);
yylsp_needed = 1;
continue;
case EOF:
- fatal("unmatched '{'");
+ fatal("unmatched `{'");
default:
putc(c, faction);
if (t == IDENTIFIER)
{
lhs = symval;
+
+ if (!start_flag)
+ {
+ startval = lhs;
+ start_flag = 1;
+ }
t = lex();
if (t != COLON)
- fatal("ill-formed rule");
+ {
+ warn("ill-formed rule: initial symbol not followed by colon");
+ unlex(t);
+ }
}
- if (nrules == 0)
+ if (nrules == 0 && t == BAR)
{
- if (t == BAR)
- fatal("grammar starts with vertical bar");
-
- if (!start_flag)
- startval = lhs;
+ warn("grammar starts with vertical bar");
+ lhs = symval; /* BOGUS: use a random symval */
}
-
/* start a new rule and record its lhs. */
nrules++;
nvars++;
}
else if (lhs->class == STOKEN)
- fatals("rule given for %s, which is a token", lhs->tag);
+ warns("rule given for %s, which is a token", lhs->tag);
/* read the rhs of the rule. */
for (;;)
{
t = lex();
+ if (t == PREC)
+ {
+ t = lex();
+ crule->ruleprec = symval;
+ t = lex();
+ }
if (! (t == IDENTIFIER || t == LEFT_CURLY)) break;
register bucket *sdummy;
/* Since the action was written out with this rule's */
- /* number, we must write give the new rule this number */
+ /* number, we must give the new rule this number */
/* by inserting the new rule before it. */
/* Make a dummy nonterminal, a gensym. */
xactions++; /* JF */
}
rulelength++;
- }
+ } /* end of read rhs of rule */
/* Put an empty link in the list to mark the end of this rule */
p = NEW(symbol_list);
if (t == PREC)
{
+ warn("two @prec's in a row");
t = lex();
crule->ruleprec = symval;
t = lex();
if (t == GUARD)
{
if (! semantic_parser)
- fatal("%guard present but %semantic_parser not specified");
+ warn("%%guard present but %%semantic_parser not specified");
copy_guard(crule, rulelength);
t = lex();
}
else if (t == LEFT_CURLY)
{
- if (actionflag) fatal("two actions at end of one rule");
+ /* This case never occurs -wjh */
+ if (actionflag) warn("two actions at end of one rule");
copy_action(crule, rulelength);
+ actionflag = 1;
+ xactions++; /* -wjh */
t = lex();
}
/* If $$ is being set in default way,
{
if (lhs->type_name == 0 || first_rhs->type_name == 0
|| strcmp(lhs->type_name,first_rhs->type_name))
- fprintf(stderr, "%s:%d: warning: type clash ('%s' '%s') on default action\n",
- infile,
- lineno,
+ warnss("type clash (`%s' `%s') on default action",
lhs->type_name ? lhs->type_name : "",
first_rhs->type_name ? first_rhs->type_name : "");
}
/* Warn if there is no default for $$ but we need one. */
else if (!xactions && !first_rhs && lhs->type_name != 0)
- fprintf(stderr,
- "%s:%d: warning: empty rule for typed nonterminal, and no action\n",
- infile,
- lineno);
+ warn("empty rule for typed nonterminal, and no action");
if (t == SEMICOLON)
t = lex();
- }
- /* these things can appear as alternatives to rules. */
+ }
+#if 0
+ /* these things can appear as alternatives to rules. */
+/* NO, they cannot.
+ a) none of the documentation allows them
+ b) most of them scan forward until finding a next %
+ thus they may swallow lots of intervening rules
+*/
else if (t == TOKEN)
{
parse_token_decl(STOKEN, SNTERM);
parse_start_decl();
t = lex();
}
+#endif
+
else
- fatal("invalid input");
+ {
+ warns("invalid input: %s", token_buffer);
+ t = lex();
+ }
}
+ /* grammar has been read. Do some checking */
+
if (nsyms > MAXSHORT)
- fatals("too many symbols (tokens plus nonterminals); maximum %d",
- MAXSHORT);
+ fatals("too many symbols (tokens plus nonterminals); maximum %s",
+ int_to_string(MAXSHORT));
if (nrules == 0)
- fatal("no input grammar");
+ fatal("no rules in the input grammar");
if (typed == 0 /* JF put out same default YYSTYPE as YACC does */
&& !value_components_used)
for (bp = firstsymbol; bp; bp = bp->next)
if (bp->class == SUNKNOWN)
{
- fprintf(stderr, "symbol %s used, not defined as token, and no rules for it\n",
+ warns("symbol %s is used, but is not defined as a token and has no rules",
bp->tag);
- failure = 1;
bp->class = SNTERM;
bp->value = nvars++;
}
{
rline_allocated = nrules * 2;
rline = (short *) xrealloc (rline,
- rline_allocated * sizeof (short));
+ rline_allocated * sizeof (short));
}
rline[nrules] = lineno;
}
/* read in a %type declaration and record its information for get_type_name to access */
-
-int
+/* this is unused. it is only called from the #if 0 part of readgram */
+static int
get_type()
{
register int k;
t = lex();
- if (t != TYPENAME)
- fatal("ill-formed %type declaration");
+ if (t != TYPENAME)
+ {
+ warn("ill-formed %type declaration");
+ return t;
+ }
k = strlen(token_buffer);
name = NEW2(k + 1, char);
case IDENTIFIER:
if (symval->type_name == NULL)
symval->type_name = name;
- else
- fatals("type redeclaration for %s", symval->tag);
+ else if (strcmp(name, symval->type_name) != 0)
+ warns("type redeclaration for %s", symval->tag);
break;
tags = NEW2(nsyms + 1, char *);
tags[0] = "$";
+ user_toknums = NEW2(nsyms + 1, int);
+ user_toknums[0] = 0;
sprec = NEW2(nsyms, short);
sassoc = NEW2(nsyms, short);
{
bp->value += ntokens;
}
- else
+ else if (bp->alias)
+ {
+ /* this symbol and its alias are a single token defn.
+ allocate a tokno, and assign to both
+ check agreement of ->prec and ->assoc fields
+ and make both the same
+ */
+ if (bp->value == 0)
+ bp->value = bp->alias->value = tokno++;
+
+ if (bp->prec != bp->alias->prec) {
+ if (bp->prec != 0 && bp->alias->prec != 0
+ && bp->user_token_number == SALIAS)
+ warnss("conflicting precedences for %s and %s",
+ bp->tag, bp->alias->tag);
+ if (bp->prec != 0) bp->alias->prec = bp->prec;
+ else bp->prec = bp->alias->prec;
+ }
+
+ if (bp->assoc != bp->alias->assoc) {
+ if (bp->assoc != 0 && bp->alias->assoc != 0
+ && bp->user_token_number == SALIAS)
+ warnss("conflicting assoc values for %s and %s",
+ bp->tag, bp->alias->tag);
+ if (bp->assoc != 0) bp->alias->assoc = bp->assoc;
+ else bp->assoc = bp->alias->assoc;
+ }
+
+ if (bp->user_token_number == SALIAS)
+ continue; /* do not do processing below for SALIASs */
+
+ }
+ else /* bp->class == STOKEN */
+ {
+ bp->value = tokno++;
+ }
+
+ if (bp->class == STOKEN)
{
if (translations && !(bp->user_token_number))
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;
- bp->value = tokno++;
}
tags[bp->value] = bp->tag;
+ user_toknums[bp->value] = bp->user_token_number;
sprec[bp->value] = bp->prec;
sassoc[bp->value] = bp->assoc;
token_translations = NEW2(max_user_token_number+1, short);
/* initialize all entries for literal tokens to 2,
- the internal token number for $illegal., which represents all invalid inputs. */
+ 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)
- {
- if (bp->value >= ntokens) continue;
- if (translations)
- {
- if (token_translations[bp->user_token_number] != 2)
- {
- /* JF made this a call to fatals() */
- fatals( "tokens %s and %s both assigned number %d",
+ 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)
+ warnsss("tokens %s and %s both assigned number %s",
tags[token_translations[bp->user_token_number]],
bp->tag,
- bp->user_token_number);
- }
- token_translations[bp->user_token_number] = bp->value;
- }
+ int_to_string(bp->user_token_number));
+ token_translations[bp->user_token_number] = bp->value;
+ }
}
error_token_number = errtoken->value;
- output_token_defines(ftable);
+ if (! noparserflag)
+ output_token_defines(ftable);
if (startval->class == SUNKNOWN)
fatals("the start symbol %s is undefined", startval->tag);
}
}
-
+/* For named tokens, but not literal ones, define the name.
+ The value is the user token number.
+*/
void
output_token_defines(file)
FILE *file;
{
bucket *bp;
+ register char *cp, *symbol;
+ register char c;
for (bp = firstsymbol; bp; bp = bp->next)
{
- if (bp->value >= ntokens) continue;
-
- /* For named tokens, but not literal ones, define the name. */
- /* The value is the user token number. */
+ symbol = bp->tag; /* get symbol */
- if ('\'' != *tags[bp->value] && bp != errtoken)
+ if (bp->value >= ntokens) continue;
+ if (bp->user_token_number == SALIAS) continue;
+ if ('\'' == *symbol) continue; /* skip literal character */
+ if (bp == errtoken) continue; /* skip error token */
+ if ('\"' == *symbol)
{
- register char *cp = tags[bp->value];
- register char c;
+ /* use literal string only if given a symbol with an alias */
+ if (bp->alias)
+ symbol = bp->alias->tag;
+ else
+ continue;
+ }
- /* Don't #define nonliteral tokens whose names contain periods. */
+ /* Don't #define nonliteral tokens whose names contain periods. */
+ cp = symbol;
+ while ((c = *cp++) && c != '.');
+ if (c != '\0') continue;
- while ((c = *cp++) && c != '.');
- if (!c)
- {
- fprintf(file, "#define\t%s\t%d\n", tags[bp->value],
- (translations ? bp->user_token_number : bp->value));
- if (semantic_parser)
- fprintf(file, "#define\tT%s\t%d\n", tags[bp->value],
- bp->value);
- }
- }
+ fprintf(file, "#define\t%s\t%d\n", symbol,
+ ((translations && ! rawtoknumflag)
+ ? bp->user_token_number
+ : bp->value));
+ if (semantic_parser)
+ fprintf(file, "#define\tT%s\t%d\n", symbol, bp->value);
}
putc('\n', file);
projects / bison.git / blobdiff