+/*
+ * antlr.g -- PCCTS Version 1.xx ANTLR
+ *
+ * $Id: antlr.g,v 1.7 95/10/05 11:57:12 parrt Exp $
+ * $Revision: 1.7 $
+ *
+ * Parse an antlr input grammar and build a syntax-diagram.
+ *
+ * Written in itself (needs at least 1.06 to work)
+ *
+ * SOFTWARE RIGHTS
+ *
+ * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
+ * Set (PCCTS) -- PCCTS is in the public domain. An individual or
+ * company may do whatever they wish with source code distributed with
+ * PCCTS or the code generated by PCCTS, including the incorporation of
+ * PCCTS, or its output, into commerical software.
+ *
+ * We encourage users to develop software with PCCTS. However, we do ask
+ * that credit is given to us for developing PCCTS. By "credit",
+ * we mean that if you incorporate our source code into one of your
+ * programs (commercial product, research project, or otherwise) that you
+ * acknowledge this fact somewhere in the documentation, research report,
+ * etc... If you like PCCTS and have developed a nice tool with the
+ * output, please mention that you developed it using PCCTS. In
+ * addition, we ask that this header remain intact in our source code.
+ * As long as these guidelines are kept, we expect to continue enhancing
+ * this system and expect to make other tools available as they are
+ * completed.
+ *
+ * ANTLR 1.33
+ * Terence Parr
+ * Parr Research Corporation
+ * with Purdue University and AHPCRC, University of Minnesota
+ * 1989-1995
+ */
+#header <<
+ #ifdef __cplusplus
+ #ifndef __STDC__
+ #define __STDC__
+ #endif
+ #endif
+ #include "set.h"
+ #include <ctype.h>
+ #include "syn.h"
+ #include "hash.h"
+ #include "generic.h"
+ #define zzcr_attr(attr,tok,t)
+ >>
+
+<<
+#ifdef __STDC__
+static void chkToken(char *, char *, char *, int);
+#else
+static void chkToken();
+#endif
+
+static int class_nest_level = 0;
+extern int inAlt;
+extern set attribsRefdFromAction;
+extern int UsedOldStyleAttrib;
+extern int UsedNewStyleLabel;
+>>
+
+#lexaction <<
+/* maintained, but not used for now */
+set AST_nodes_refd_in_actions = set_init;
+int inAlt = 0;
+set attribsRefdFromAction;
+int UsedOldStyleAttrib = 0;
+int UsedNewStyleLabel = 0;
+#ifdef __USE_PROTOS
+char *inline_set(char *);
+#else
+char *inline_set();
+#endif
+>>
+
+#lexclass STRINGS
+#token QuotedTerm "\"" << zzmode(START); >>
+#token "[\n\r]" <<
+ zzline++;
+ warn("eoln found in string");
+ zzskip();
+ >>
+#token "\\[\n\r]" << zzline++; zzmore(); >>
+#token "\\~[]" << zzmore(); >>
+#token "~[\n\r\"\\]+" << zzmore(); >>
+
+#lexclass ACTION_STRINGS
+#token "\"" << zzmode(ACTIONS); zzmore(); >>
+#token "[\n\r]" <<
+ zzline++;
+ warn("eoln found in string (in user action)");
+ zzskip();
+ >>
+#token "\\[\n\r]" << zzline++; zzmore(); >>
+#token "\\~[]" << zzmore(); >>
+#token "~[\n\r\"\\]+" << zzmore(); >>
+
+#lexclass ACTION_CHARS
+#token "'" << zzmode(ACTIONS); zzmore(); >>
+#token "[\n\r]" <<
+ zzline++;
+ warn("eoln found in char literal (in user action)");
+ zzskip();
+ >>
+#token "\\~[]" << zzmore(); >>
+#token "~[\n\r'\\]+" << zzmore(); >>
+
+#lexclass ACTION_COMMENTS
+#token "\*/" << zzmode(ACTIONS); zzmore(); >>
+#token "\*" << zzmore(); >>
+#token "[\n\r]" << zzline++; zzmore(); DAWDLE; >>
+#token "~[\n\r\*]+" << zzmore(); >>
+
+#lexclass TOK_DEF_COMMENTS
+#token "\*/" << zzmode(PARSE_ENUM_FILE);
+zzmore(); >>
+#token "\*" << zzmore(); >>
+#token "[\n\r]" << zzline++; zzmore(); DAWDLE; >>
+#token "~[\n\r\*]+" << zzmore(); >>
+
+#lexclass TOK_DEF_CPP_COMMENTS
+#token "[\n\r]" << zzline++; zzmode(PARSE_ENUM_FILE); zzskip(); DAWDLE; >>
+#token "~[\n\r]+" << zzskip(); >>
+
+#lexclass ACTION_CPP_COMMENTS
+#token "[\n\r]" << zzline++; zzmode(ACTIONS); zzmore(); DAWDLE; >>
+#token "~[\n\r]+" << zzmore(); >>
+
+#lexclass CPP_COMMENTS
+#token "[\n\r]" << zzline++; zzmode(START); zzskip(); DAWDLE; >>
+#token "~[\n\r]+" << zzskip(); >>
+
+#lexclass COMMENTS
+#token "\*/" << zzmode(START); zzskip(); >>
+#token "\*" << zzskip(); >>
+#token "[\n\r]" << zzline++; zzskip(); DAWDLE; >>
+#token "~[\n\r\*]+" << zzskip(); >>
+
+/*
+ * This lexical class accepts actions of type [..] and <<..>>
+ *
+ * It translates the following special items for C:
+ *
+ * $j --> "zzaArg(current zztasp, j)"
+ * $i.j --> "zzaArg(zztaspi, j)"
+ * $i.nondigit> "zzaArg(current zztasp, i).nondigit"
+ * $$ --> "zzaRet"
+ * $alnum --> "alnum" (used to ref parameters)
+ * $rule --> "zzaRet"
+ * $retval --> "_retv.retval" if > 1 return values else "_retv"
+ * $[token, text] --> "zzconstr_attr(token, text)"
+ * $[] --> "zzempty_attr()"
+ *
+ * It translates the following special items for C++:
+ * (attributes are now stored with 'Token' and $i's are only
+ * pointers to the Tokens. Rules don't have attributes now.)
+ *
+ * $j --> "_tbj" where b is the block level
+ * $i.j --> "_tij"
+ * $j->nondigit> "_tbj->nondigit"
+ * $$ --> "$$"
+ * $alnum --> "alnum" (used to ref parameters)
+ * $rule --> "$rule"
+ * $retval --> "_retv.retval" if > 1 return values else "_retv"
+ * $[token, text] --> invalid
+ * $[] --> invalid
+ *
+ * And, for trees:
+ *
+ * #0 --> "(*_root)"
+ * #i --> "zzastArg(i)"
+ * #[args] --> "zzmk_ast(zzastnew(), args)"
+ * #[] --> "zzastnew()"
+ * #( root, child1, ..., childn )
+ * --> "zztmake(root, child1, ...., childn, NULL)"
+ * #() --> "NULL"
+ *
+ * For C++, ...
+ *
+ * #0 --> "(*_root)"
+ * #i --> "_astbi" where b is the block level
+ * #alnum --> "alnum_ast" (used to ref #label)
+ * #[args] --> "new AST(args)"
+ * #[] --> "new AST"
+ * #( root, child1, ..., childn )
+ * --> "AST::tmake(root, child1, ...., childn, NULL)"
+ * #() --> "NULL"
+ *
+ * To escape,
+ *
+ * \] --> ]
+ * \) --> )
+ * \$ --> $
+ * \# --> #
+ *
+ * A stack is used to nest action terminators because they can be nested
+ * like crazy: << #[$[..],..] >>
+ */
+#lexclass ACTIONS
+#token Action "\>\>" << /* these do not nest */
+ zzmode(START);
+ NLATEXT[0] = ' ';
+ NLATEXT[1] = ' ';
+ zzbegexpr[0] = ' ';
+ zzbegexpr[1] = ' ';
+ if ( zzbufovf ) {
+ err( eMsgd("action buffer overflow; size %d",ZZLEXBUFSIZE));
+ }
+ >>
+#token Pred "\>\>?" << /* these do not nest */
+ zzmode(START);
+ NLATEXT[0] = ' ';
+ NLATEXT[1] = ' ';
+ zzbegexpr[0] = '\0';
+ if ( zzbufovf ) {
+ err( eMsgd("predicate buffer overflow; size %d",ZZLEXBUFSIZE));
+ }
+ >>
+#token PassAction "\]" << if ( topint() == ']' ) {
+ popint();
+ if ( istackempty() ) /* terminate action */
+ {
+ zzmode(START);
+ NLATEXT[0] = ' ';
+ zzbegexpr[0] = ' ';
+ if ( zzbufovf ) {
+ err( eMsgd("parameter buffer overflow; size %d",ZZLEXBUFSIZE));
+ }
+ }
+ else {
+ /* terminate $[..] and #[..] */
+ if ( GenCC ) zzreplstr("))");
+ else zzreplstr(")");
+ zzmore();
+ }
+ }
+ else if ( topint() == '|' ) { /* end of simple [...] */
+ popint();
+ zzmore();
+ }
+ else zzmore();
+ >>
+#token "consumeUntil\( [\ \t]* \{~[\}]+\} [\ \t]* \)"
+ <<
+ zzmore();
+ zzreplstr(inline_set(zzbegexpr+
+ strlen("consumeUntil(")));
+ >>
+#token "consumeUntil\( ~[\)]+ \)"
+ << zzmore(); >>
+#token "[\n\r]" << zzline++; zzmore(); DAWDLE; >>
+#token "\>" << zzmore(); >>
+#token "$" << zzmore(); >>
+#token "$$" << if ( !GenCC ) {zzreplstr("zzaRet"); zzmore();}
+ else err("$$ use invalid in C++ mode"); >>
+
+#token "$\[\]" << if ( !GenCC ) {zzreplstr("zzempty_attr"); zzmore();}
+ else err("$[] use invalid in C++ mode"); >>
+#token "$\[" <<
+ pushint(']');
+ if ( !GenCC ) zzreplstr("zzconstr_attr(");
+ else err("$[..] use invalid in C++ mode");
+ zzmore();
+ >>
+#token "$[0-9]+" <<{
+ static char buf[100];
+ if ( strlen(zzbegexpr)>(size_t)85 )
+ fatal("$i attrib ref too big");
+ set_orel(atoi(zzbegexpr+1), &attribsRefdFromAction);
+ if ( !GenCC ) sprintf(buf,"zzaArg(zztasp%d,%s)",
+ BlkLevel-1,zzbegexpr+1);
+ else sprintf(buf,"_t%d%s",
+ BlkLevel-1,zzbegexpr+1);
+ zzreplstr(buf);
+ zzmore();
+ UsedOldStyleAttrib = 1;
+ if ( UsedNewStyleLabel )
+ err("cannot mix old-style $i with new-style labels");
+ }
+ >>
+#token "$[0-9]+." <<{
+ static char buf[100];
+ if ( strlen(zzbegexpr)>(size_t)85 )
+ fatal("$i.field attrib ref too big");
+ zzbegexpr[strlen(zzbegexpr)-1] = ' ';
+ set_orel(atoi(zzbegexpr+1), &attribsRefdFromAction);
+ if ( !GenCC ) sprintf(buf,"zzaArg(zztasp%d,%s).",
+ BlkLevel-1,zzbegexpr+1);
+ else sprintf(buf,"_t%d%s.",
+ BlkLevel-1,zzbegexpr+1);
+ zzreplstr(buf);
+ zzmore();
+ UsedOldStyleAttrib = 1;
+ if ( UsedNewStyleLabel )
+ err("cannot mix old-style $i with new-style labels");
+ }
+ >>
+#token "$[0-9]+.[0-9]+" <<{
+ static char buf[100];
+ static char i[20], j[20];
+ char *p,*q;
+ if (strlen(zzbegexpr)>(size_t)85) fatal("$i.j attrib ref too big");
+ for (p=zzbegexpr+1,q= &i[0]; *p!='.'; p++) {
+ if ( q == &i[20] )
+ fatalFL("i of $i.j attrib ref too big",
+ FileStr[CurFile], zzline );
+ *q++ = *p;
+ }
+ *q = '\0';
+ for (p++, q= &j[0]; *p!='\0'; p++) {
+ if ( q == &j[20] )
+ fatalFL("j of $i.j attrib ref too big",
+ FileStr[CurFile], zzline );
+ *q++ = *p;
+ }
+ *q = '\0';
+ if ( !GenCC ) sprintf(buf,"zzaArg(zztasp%s,%s)",i,j);
+ else sprintf(buf,"_t%s%s",i,j);
+ zzreplstr(buf);
+ zzmore();
+ UsedOldStyleAttrib = 1;
+ if ( UsedNewStyleLabel )
+ err("cannot mix old-style $i with new-style labels");
+ }
+ >>
+#token "$[_a-zA-Z][_a-zA-Z0-9]*"
+ <<{ static char buf[300]; LabelEntry *el;
+ zzbegexpr[0] = ' ';
+ if ( CurRule != NULL &&
+ strcmp(CurRule, &zzbegexpr[1])==0 ) {
+ if ( !GenCC ) zzreplstr("zzaRet");
+ }
+ else if ( CurRetDef != NULL &&
+ strmember(CurRetDef, &zzbegexpr[1])) {
+ if ( HasComma( CurRetDef ) ) {
+ require (strlen(zzbegexpr)<=(size_t)285,
+ "$retval attrib ref too big");
+ sprintf(buf,"_retv.%s",&zzbegexpr[1]);
+ zzreplstr(buf);
+ }
+ else zzreplstr("_retv");
+ }
+ else if ( CurParmDef != NULL &&
+ strmember(CurParmDef, &zzbegexpr[1])) {
+ ;
+ }
+ else if ( Elabel==NULL ) {
+ { err("$-variables in actions outside of rules are not allowed"); }
+ } else if ( (el=(LabelEntry *)hash_get(Elabel, &zzbegexpr[1]))!=NULL ) {
+ if ( GenCC && (el->elem==NULL || el->elem->ntype==nRuleRef) )
+ { err(eMsg1("There are no token ptrs for rule references: '$%s'",&zzbegexpr[1])); }
+ }
+ else
+ warn(eMsg1("$%s not parameter, return value, or element label",&zzbegexpr[1]));
+ }
+ zzmore();
+ >>
+#token "#0" << zzreplstr("(*_root)"); zzmore(); chkGTFlag(); >>
+#token "#\[\]" << if ( GenCC ) {zzreplstr("(new AST)");}
+ else {zzreplstr("zzastnew()");} zzmore();
+ chkGTFlag();
+ >>
+#token "#\(\)" << zzreplstr("NULL"); zzmore(); chkGTFlag(); >>
+#token "#[0-9]+" <<{
+ static char buf[100];
+ if ( strlen(zzbegexpr)>(size_t)85 )
+ fatal("#i AST ref too big");
+ if ( GenCC ) sprintf(buf,"_ast%d%s",BlkLevel-1,zzbegexpr+1);
+ else sprintf(buf,"zzastArg(%s)",zzbegexpr+1);
+ zzreplstr(buf);
+ zzmore();
+ set_orel(atoi(zzbegexpr+1), &AST_nodes_refd_in_actions);
+ chkGTFlag();
+ }
+ >>
+#token "#[_a-zA-Z][_a-zA-Z0-9]*"
+ <<
+ if ( !(strcmp(zzbegexpr, "#ifdef")==0 ||
+ strcmp(zzbegexpr, "#if")==0 ||
+ strcmp(zzbegexpr, "#else")==0 ||
+ strcmp(zzbegexpr, "#endif")==0 ||
+ strcmp(zzbegexpr, "#ifndef")==0 ||
+ strcmp(zzbegexpr, "#define")==0 ||
+ strcmp(zzbegexpr, "#pragma")==0 ||
+ strcmp(zzbegexpr, "#undef")==0 ||
+ strcmp(zzbegexpr, "#import")==0 ||
+ strcmp(zzbegexpr, "#line")==0 ||
+ strcmp(zzbegexpr, "#include")==0 ||
+ strcmp(zzbegexpr, "#error")==0) )
+ {
+ static char buf[100];
+ sprintf(buf, "%s_ast", zzbegexpr+1);
+ zzreplstr(buf);
+ chkGTFlag();
+ }
+ zzmore();
+ >>
+#token "#\[" <<
+ pushint(']');
+ if ( GenCC ) zzreplstr("(new AST(");
+ else zzreplstr("zzmk_ast(zzastnew(),");
+ zzmore();
+ chkGTFlag();
+ >>
+#token "#\(" <<
+ pushint('}');
+ if ( GenCC ) zzreplstr("ASTBase::tmake(");
+ else zzreplstr("zztmake(");
+ zzmore();
+ chkGTFlag();
+ >>
+#token "#" << zzmore(); >>
+#token "\)" <<
+ if ( istackempty() )
+ zzmore();
+ else if ( topint()==')' ) {
+ popint();
+ }
+ else if ( topint()=='}' ) {
+ popint();
+ /* terminate #(..) */
+ zzreplstr(", NULL)");
+ }
+ zzmore();
+ >>
+#token "\[" <<
+ pushint('|'); /* look for '|' to terminate simple [...] */
+ zzmore();
+ >>
+#token "\(" <<
+ pushint(')');
+ zzmore();
+ >>
+
+#token "\\\]" << zzreplstr("]"); zzmore(); >>
+#token "\\\)" << zzreplstr(")"); zzmore(); >>
+#token "\\>" << zzreplstr(">"); zzmore(); >>
+
+
+#token "'" << zzmode(ACTION_CHARS); zzmore();>>
+#token "\"" << zzmode(ACTION_STRINGS); zzmore();>>
+#token "\\$" << zzreplstr("$"); zzmore(); >>
+#token "\\#" << zzreplstr("#"); zzmore(); >>
+#token "\\[\n\r]" << zzline++; zzmore(); >>
+#token "\\~[\]\)>$#]" << zzmore(); >> /* escaped char, always ignore */
+#token "/" << zzmore(); >>
+#token "/\*" << zzmode(ACTION_COMMENTS); zzmore(); >>
+#token "\*/" << warn("Missing /*; found dangling */ in action"); zzmore(); >>
+#token "//" << zzmode(ACTION_CPP_COMMENTS); zzmore(); >>
+#token "~[\n\r\)\(\\$#\>\]\[\"'/]+" << zzmore(); >>
+
+#lexclass START
+#token "[\t\ ]+" << zzskip(); >> /* Ignore White */
+#token "[\n\r]" << zzline++; zzskip(); >> /* Track Line # */
+#token "\[" << zzmode(ACTIONS); zzmore();
+ istackreset();
+ pushint(']'); >>
+#token "\<\<" << action_file=CurFile; action_line=zzline;
+ zzmode(ACTIONS); zzmore();
+ istackreset();
+ pushint('>'); >>
+#token "\"" << zzmode(STRINGS); zzmore(); >>
+#token "/\*" << zzmode(COMMENTS); zzskip(); >>
+#token "\*/" << warn("Missing /*; found dangling */"); zzskip(); >>
+#token "//" << zzmode(CPP_COMMENTS); zzskip(); >>
+#token "\>\>" << warn("Missing <<; found dangling \\>\\>"); zzskip(); >>
+#token WildCard "."
+#token "\@" <<FoundException = 1;>>
+#token Eof "@"
+ << /* L o o k F o r A n o t h e r F i l e */
+ {
+ FILE *new_input;
+ new_input = NextFile();
+ if ( new_input == NULL ) { NLA=Eof; return; }
+ fclose( input );
+ input = new_input;
+ zzrdstream( input );
+ zzskip(); /* Skip the Eof (@) char i.e continue */
+ }
+ >>
+
+#token LABEL
+
+#errclass "grammar-element" { element }
+#errclass "meta-symbol" { "\}" "!" ";" "\|" "\~" "^" "\)" }
+
+/*
+ * Get a grammar -- Build a list of rules like:
+ *
+ * o-->Rule1--o
+ * |
+ * o-->Rule2--o
+ * |
+ * ...
+ * |
+ * o-->RuleN--o
+ */
+grammar : <<Graph g;>>
+ ( "#header" Action
+ <<
+ if ( HdrAction==NULL ) {
+ HdrAction = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(HdrAction!=NULL, "rule grammar: cannot allocate header action");
+ strcpy(HdrAction, LATEXT(1));
+ }
+ else warn("additional #header statement ignored");
+ >>
+ | "#parser" QuotedTerm
+ <<
+ if ( GenCC ) {
+ warn("#parser meta-op incompatible with -CC; ignored");
+ }
+ else {
+ if ( strcmp(ParserName,"zzparser")==0 ) {
+ ParserName=StripQuotes(mystrdup(LATEXT(1)));
+ if ( RulePrefix[0]!='\0' )
+ {
+ warn("#parser meta-op incompatible with '-gp prefix'; '-gp' ignored");
+ RulePrefix[0]='\0';
+ }
+ }
+ else warn("additional #parser statement ignored");
+ }
+ >>
+ | "#tokdefs" QuotedTerm
+ <<{
+ char *fname;
+ zzantlr_state st; FILE *f; struct zzdlg_state dst;
+ UserTokenDefsFile = mystrdup(LATEXT(1));
+ zzsave_antlr_state(&st);
+ zzsave_dlg_state(&dst);
+ fname = mystrdup(LATEXT(1));
+ f = fopen(StripQuotes(fname), "r");
+ if ( f==NULL ) {warn(eMsg1("cannot open token defs file '%s'", fname+1));}
+ else {
+ ANTLRm(enum_file(fname+1), f, PARSE_ENUM_FILE);
+ UserDefdTokens = 1;
+ }
+ zzrestore_antlr_state(&st);
+ zzrestore_dlg_state(&dst);
+ }>>
+ )*
+ ( Action
+ <<{
+ UserAction *ua = newUserAction(LATEXT(1));
+ ua->file = action_file; ua->line = action_line;
+ if ( class_nest_level>0 ) list_add(&class_before_actions, ua);
+ else list_add(&BeforeActions, ua);
+ }>>
+ | laction
+ | aLexclass
+ | token
+ | error
+ | tclass
+ | default_exception_handler
+ | class_def
+ | "\}"
+ <<
+ if ( class_nest_level==0 )
+ warn("missing class definition for trailing '}'");
+ class_nest_level--;
+ >>
+ )*
+ rule <<g=$3; SynDiag = (Junction *) $3.left;>>
+ ( rule <<if ( $1.left!=NULL ) {g.right = NULL; g = Or(g, $1);}>>
+ | aLexclass
+ | token
+ | error
+ | tclass
+ | class_def
+ | "\}"
+ <<
+ if ( class_nest_level==0 )
+ warn("missing class definition for trailing '}'");
+ class_nest_level--;
+ >>
+ )*
+ ( Action
+ <<{
+ UserAction *ua = newUserAction(LATEXT(1));
+ ua->file = action_file; ua->line = action_line;
+ if ( class_nest_level>0 ) list_add(&class_after_actions, ua);
+ else list_add(&AfterActions, ua);
+ }>>
+ | laction
+ | error
+ | tclass
+ | class_def
+ | "\}"
+ <<
+ if ( class_nest_level==0 )
+ warn("missing class definition for trailing '}'");
+ class_nest_level--;
+ >>
+ )*
+ Eof
+ ;
+ <<CannotContinue=TRUE;>>
+
+class_def
+ : <<int go=1; char name[MaxRuleName+1];>>
+ "class"
+ ( NonTerminal <<if(go) strncpy(name,LATEXT(1),MaxRuleName);>>
+ | TokenTerm <<if(go) strncpy(name,LATEXT(1),MaxRuleName);>>
+ )
+ <<
+ if ( CurrentClassName[0]!='\0' && strcmp(CurrentClassName,name)!=0
+ && GenCC ) {
+ err("only one grammar class allowed in this release");
+ go = 0;
+ }
+ else strcpy(CurrentClassName, name);
+ >>
+ <<if ( !GenCC ) { err("class meta-op used without C++ option"); }>>
+ "\{"
+ <<
+ no_classes_found = 0;
+ if ( class_nest_level>=1 ) {warn("cannot have nested classes");}
+ else class_nest_level++;
+ >>
+ ;
+ <<CannotContinue=TRUE;>>
+
+/*
+ * Build -o-->o-R-o-->o- where -o-R-o- is the block from rule 'block'.
+ * Construct the RuleBlk front and EndRule node on the end of the
+ * block. This is used to add FOLLOW pointers to the rule end. Add the
+ * new rule name to the Rname hash table and sets its rulenum.
+ * Store the parameter definitions if any are found.
+ *
+ * Note that locks are required on the RuleBlk and EndRule nodes to thwart
+ * infinite recursion.
+ *
+ * Return the left graph pointer == NULL to indicate error/dupl rule def.
+ */
+rule : <<
+ ListNode *ex_groups = NULL;
+ ExceptionGroup *eg;
+ RuleEntry *q; Junction *p; Graph r; int f, l; ECnode *e;
+ set toksrefd, rulesrefd;
+ char *pdecl=NULL, *ret=NULL, *a; CurRetDef = CurParmDef = NULL;
+ CurExGroups = NULL;
+ CurElementLabels = NULL;
+ /* We want a new element label hash table for each rule */
+ if ( Elabel!=NULL ) killHashTable(Elabel);
+ Elabel = newHashTable();
+ attribsRefdFromAction = empty;
+ >>
+ NonTerminal
+ <<q=NULL;
+ if ( hash_get(Rname, LATEXT(1))!=NULL ) {
+ err(eMsg1("duplicate rule definition: '%s'",LATEXT(1)));
+ CannotContinue=TRUE;
+ }
+ else
+ {
+ q = (RuleEntry *)hash_add(Rname,
+ LATEXT(1),
+ (Entry *)newRuleEntry(LATEXT(1)));
+ CurRule = q->str;
+ }
+ CurRuleNode = q;
+ f = CurFile; l = zzline;
+ NumRules++;
+ >>
+ { "!" <<if ( q!=NULL ) q->noAST = TRUE;>> }
+ { <<;>>
+ {"\<"}
+ PassAction
+ << pdecl = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(pdecl!=NULL, "rule rule: cannot allocate param decl");
+ strcpy(pdecl, LATEXT(1));
+ CurParmDef = pdecl;
+ >>
+ }
+ { "\>"
+ PassAction
+ << ret = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(ret!=NULL, "rule rule: cannot allocate ret type");
+ strcpy(ret, LATEXT(1));
+ CurRetDef = ret;
+ >>
+ }
+ { QuotedTerm <<if ( q!=NULL ) q->egroup=mystrdup(LATEXT(1));>> }
+ <<
+ if ( GenEClasseForRules && q!=NULL ) {
+ e = newECnode;
+ require(e!=NULL, "cannot allocate error class node");
+ if ( q->egroup == NULL ) {a = q->str; a[0] = (char)toupper(a[0]);}
+ else a = q->egroup;
+ if ( Tnum( a ) == 0 )
+ {
+ e->tok = addTname( a );
+ list_add(&eclasses, (char *)e);
+ if ( q->egroup == NULL ) a[0] = (char)tolower(a[0]);
+ /* refers to itself */
+ list_add(&(e->elist), mystrdup(q->str));
+ }
+ else {
+ warn(eMsg1("default errclass for '%s' would conflict with token/errclass/tokclass",a));
+ if ( q->egroup == NULL ) a[0] = (char)tolower(a[0]);
+ free((char *)e);
+ }
+ }
+ >>
+ <<BlkLevel++;>>
+ ":" <<inAlt=1;>>
+ block[&toksrefd, &rulesrefd]
+ <<r = makeBlk($7,0);
+ CurRuleBlk = (Junction *)r.left;
+ CurRuleBlk->blockid = CurBlockID;
+ CurRuleBlk->jtype = RuleBlk;
+ if ( q!=NULL ) CurRuleBlk->rname = q->str;
+ CurRuleBlk->file = f;
+ CurRuleBlk->line = l;
+ CurRuleBlk->pdecl = pdecl;
+ CurRuleBlk->ret = ret;
+ CurRuleBlk->lock = makelocks();
+ CurRuleBlk->pred_lock = makelocks();
+ CurRuleBlk->tokrefs = toksrefd;
+ CurRuleBlk->rulerefs = rulesrefd;
+ p = newJunction(); /* add EndRule Node */
+ ((Junction *)r.right)->p1 = (Node *)p;
+ r.right = (Node *) p;
+ p->jtype = EndRule;
+ p->lock = makelocks();
+ p->pred_lock = makelocks();
+ CurRuleBlk->end = p;
+ if ( q!=NULL ) q->rulenum = NumRules;
+ $7 = r;
+ >>
+ <<--BlkLevel;>>
+ ";" <<inAlt=0;>>
+ { Action
+ << a = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(a!=NULL, "rule rule: cannot allocate error action");
+ strcpy(a, LATEXT(1));
+ CurRuleBlk->erraction = a;
+ >>
+ }
+ ( exception_group > [eg]
+ <<if ( eg!=NULL ) {
+ list_add(&CurExGroups, (void *)eg);
+ if ( eg->label=='\0' ) q->has_rule_exception = 1;
+ }
+ >>
+ )*
+ <<if ( q==NULL ) $0.left = NULL; else $0 = $7;>>
+ <<CurRuleNode = NULL;>>
+ <<CurRuleBlk->exceptions = CurExGroups;>>
+ <<CurRuleBlk->el_labels = CurElementLabels;>>
+ ;
+ <<CannotContinue=TRUE;>>
+
+/*
+pragma : "#pragma" "dup\-labeled\-tokens"
+ <<Pragma_DupLabeledTokens=1;>>
+ ;
+*/
+
+laction : <<char *a;>>
+ "#lexaction"
+ Action
+ <<
+ a = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(a!=NULL, "rule laction: cannot allocate action");
+ strcpy(a, LATEXT(1));
+ list_add(&LexActions, a);
+ >>
+ ;
+ <<CannotContinue=TRUE;>>
+
+aLexclass: "#lexclass" TokenTerm <<lexclass(mystrdup(LATEXT(1)));>>
+ ;
+ <<CannotContinue=TRUE;>>
+
+error : <<char *t=NULL; ECnode *e; int go=1; TermEntry *p;>>
+ "#errclass"
+ (<<;>> TokenTerm <<t=mystrdup(LATEXT(1));>>
+ | QuotedTerm <<t=mystrdup(LATEXT(1));>>
+ )
+ <<e = newECnode;
+ require(e!=NULL, "cannot allocate error class node");
+ e->lexclass = CurrentLexClass;
+ if ( Tnum( (t=StripQuotes(t)) ) == 0 )
+ {
+ if ( hash_get(Texpr, t) != NULL )
+ warn(eMsg1("errclass name conflicts with regular expression '%s'",t));
+ e->tok = addTname( t );
+ set_orel(e->tok, &imag_tokens);
+ require((p=(TermEntry *)hash_get(Tname, t)) != NULL,
+ "hash table mechanism is broken");
+ p->classname = 1; /* entry is errclass name, not token */
+ list_add(&eclasses, (char *)e);
+ }
+ else
+ {
+ warn(eMsg1("redefinition of errclass or conflict w/token or tokclass '%s'; ignored",t));
+ free( (char *)e );
+ go=0;
+ }
+ >>
+ "\{"
+ ( NonTerminal <<if ( go ) t=mystrdup(LATEXT(1));>>
+ | TokenTerm <<if ( go ) t=mystrdup(LATEXT(1));>>
+ | QuotedTerm <<if ( go ) t=mystrdup(LATEXT(1));>>
+ )
+ <<if ( go ) list_add(&(e->elist), t);>>
+ (
+ ( NonTerminal <<if ( go ) t=mystrdup(LATEXT(1));>>
+ | TokenTerm <<if ( go ) t=mystrdup(LATEXT(1));>>
+ | QuotedTerm <<if ( go ) t=mystrdup(LATEXT(1));>>
+ )
+ <<if ( go ) list_add(&(e->elist), t);>>
+ )*
+ "\}"
+ ;
+ <<CannotContinue=TRUE;>>
+
+tclass : <<char *t=NULL; TCnode *e; int go=1,tok; TermEntry *p, *term;>>
+ "#tokclass" TokenTerm <<t=mystrdup(LATEXT(1));>>
+ <<e = newTCnode;
+ require(e!=NULL, "cannot allocate token class node");
+ e->lexclass = CurrentLexClass;
+ if ( Tnum( t ) == 0 )
+ {
+ e->tok = addTname( t );
+ set_orel(e->tok, &imag_tokens);
+ set_orel(e->tok, &tokclasses);
+ require((p=(TermEntry *)hash_get(Tname, t)) != NULL,
+ "hash table mechanism is broken");
+ p->classname = 1; /* entry is class name, not token */
+ p->tclass = e; /* save ptr to this tclass def */
+ list_add(&tclasses, (char *)e);
+ }
+ else
+ {
+ warn(eMsg1("redefinition of tokclass or conflict w/token '%s'; ignored",t));
+ free( (char *)e );
+ go=0;
+ }
+ >>
+ "\{"
+ (
+ ( TokenTerm
+ <<if ( go ) {
+ term = (TermEntry *) hash_get(Tname, LATEXT(1));
+ if ( term==NULL && UserDefdTokens ) {
+ err("implicit token definition not allowed with #tokdefs");
+ go = 0;
+ }
+ else {t=mystrdup(LATEXT(1)); tok=addTname(LATEXT(1));}
+ }>>
+ | QuotedTerm
+ <<if ( go ) {
+ term = (TermEntry *) hash_get(Texpr, LATEXT(1));
+ if ( term==NULL && UserDefdTokens ) {
+ err("implicit token definition not allowed with #tokdefs");
+ go = 0;
+ }
+ else {t=mystrdup(LATEXT(1)); tok=addTexpr(LATEXT(1));}
+ }>>
+ )
+ <<if ( go ) list_add(&(e->tlist), t);>>
+ )*
+ "\}"
+ ;
+ <<CannotContinue=TRUE;>>
+
+token : <<char *t=NULL, *e=NULL, *a=NULL; int tnum=0;>>
+ "#token"
+ { TokenTerm <<t=mystrdup(LATEXT(1));>>
+ { "=" "[0-9]+" /* define the token type number */
+ <<tnum = atoi(LATEXT(1));>>
+ }
+ }
+ { QuotedTerm <<e=mystrdup(LATEXT(1));>> }
+ { Action
+ <<
+ a = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(a!=NULL, "rule token: cannot allocate action");
+ strcpy(a, LATEXT(1));
+ >>
+ }
+ <<chkToken(t, e, a, tnum);>>
+ ;
+ <<CannotContinue=TRUE;>>
+
+block[set *toksrefd, set *rulesrefd]
+ : <<
+ Graph g, b;
+ set saveblah;
+ int saveinalt = inAlt;
+ ExceptionGroup *eg;
+ *$toksrefd = empty;
+ *$rulesrefd = empty;
+ set_clr(AST_nodes_refd_in_actions);
+ CurBlockID++;
+ CurAltNum = 1;
+ saveblah = attribsRefdFromAction;
+ attribsRefdFromAction = empty;
+ >>
+ alt[toksrefd,rulesrefd] <<b = g = $1;>>
+ <<
+ if ( ((Junction *)g.left)->p1->ntype == nAction )
+ {
+ if ( !((ActionNode *)(((Junction *)g.left)->p1))->is_predicate )
+ {
+ ((ActionNode *)(((Junction *)g.left)->p1))->init_action = TRUE;
+ }
+ }
+ ((Junction *)g.left)->blockid = CurBlockID;
+ >>
+
+ ( exception_group > [eg]
+ <<
+ if ( eg!=NULL ) {
+ eg->altID = makeAltID(CurBlockID,CurAltNum);
+ CurAltStart->exception_label = eg->altID;
+ list_add(&CurExGroups, (void *)eg);
+ }
+ >>
+ )*
+ <<CurAltNum++;>>
+
+ ( "\|" <<inAlt=1;>>
+ alt[toksrefd,rulesrefd] <<g = Or(g, $2);>>
+ <<
+ ((Junction *)g.left)->blockid = CurBlockID;
+ >>
+
+ ( exception_group > [eg]
+ <<
+ if ( eg!=NULL ) {
+ eg->altID = makeAltID(CurBlockID,CurAltNum);
+ CurAltStart->exception_label = eg->altID;
+ list_add(&CurExGroups, (void *)eg);
+ }
+ >>
+ )*
+
+ <<CurAltNum++;>>
+
+ )*
+ <<$0 = b;>>
+ <<attribsRefdFromAction = saveblah; inAlt = saveinalt;>>
+ ;
+ <<CannotContinue=TRUE;>>
+
+alt[set *toksrefd, set *rulesrefd]
+ : <<int n=0,ne=0; Graph g; int e_num=0, not=0; Node *node; set elems, dif;
+ int first_on_line = 1, use_def_MT_handler = 0;
+ g.left=NULL; g.right=NULL;
+ CurAltStart = NULL;
+ elems = empty;
+ inAlt = 1;
+ >>
+ { "\@" /* handle MismatchedToken signals with default handler */
+ <<use_def_MT_handler = 1;>>
+ }
+ ( <<int tok;>>
+ { <<not=0;>> "\~" <<not=1;>> }
+ element[not, first_on_line, use_def_MT_handler] > [node]
+ <<if ( node!=NULL && node->ntype!=nAction ) first_on_line = 0;>>
+ <<
+ if ( $2.left!=NULL ) {
+ g = Cat(g, $2);
+ n++;
+ if ( node!=NULL ) {
+ if ( node->ntype!=nAction ) e_num++;
+ /* record record number of all rule and token refs */
+ if ( node->ntype==nToken ) {
+ TokNode *tk = (TokNode *)((Junction *)$2.left)->p1;
+ tk->elnum = e_num;
+ set_orel(e_num, &elems);
+ }
+ else if ( node->ntype==nRuleRef ) {
+ RuleRefNode *rn = (RuleRefNode *)((Junction *)$2.left)->p1;
+ rn->elnum = e_num;
+ set_orel(e_num, $rulesrefd);
+ }
+ }
+ }
+ >>
+ )*
+ <<if ( n == 0 ) g = emptyAlt();
+ $0 = g;
+ /* We want to reduce number of LT(i) calls and the number of
+ * local attribute variables in C++ mode (for moment, later we'll
+ * do for C also). However, if trees are being built, they
+ * require most of the attrib variables to create the tree nodes
+ * with; therefore, we gen a token ptr for each token ref in C++
+ */
+ if ( GenCC && !GenAST )
+ {
+ /* This now free's the temp set -ATG 5/6/95 */
+ set temp;
+ temp = set_and(elems, attribsRefdFromAction);
+ set_orin($toksrefd, temp);
+ set_free(temp);
+ }
+ else set_orin($toksrefd, elems);
+ if ( GenCC ) {
+ dif = set_dif(attribsRefdFromAction, elems);
+ if ( set_deg(dif)>0 )
+ err("one or more $i in action(s) refer to non-token elements");
+ set_free(dif);
+ }
+ set_free(elems);
+ set_free(attribsRefdFromAction);
+ inAlt = 0;
+ >>
+ ;
+ <<CannotContinue=TRUE;>>
+
+element_label > [LabelEntry *label]
+ : <<TermEntry *t=NULL; LabelEntry *l=NULL; RuleEntry *r=NULL; char *lab;>>
+ LABEL <<lab = mystrdup(LATEXT(1));>>
+ <<
+ UsedNewStyleLabel = 1;
+ if ( UsedOldStyleAttrib ) err("cannot mix with new-style labels with old-style $i");
+ t = (TermEntry *) hash_get(Tname, lab);
+ if ( t==NULL ) t = (TermEntry *) hash_get(Texpr, lab);
+ if ( t==NULL ) r = (RuleEntry *) hash_get(Rname, lab);
+ if ( t!=NULL ) {
+ err(eMsg1("label definition clashes with token/tokclass definition: '%s'", lab));
+ $label = NULL;
+ }
+ else if ( r!=NULL ) {
+ err(eMsg1("label definition clashes with rule definition: '%s'", lab));
+ $label = NULL;
+ }
+ else {
+ /* we don't clash with anybody else */
+ l = (LabelEntry *) hash_get(Elabel, lab);
+ if ( l==NULL ) { /* ok to add new element label */
+ l = (LabelEntry *)hash_add(Elabel,
+ lab,
+ (Entry *)newLabelEntry(lab));
+ /* add to list of element labels for this rule */
+ list_add(&CurElementLabels, (void *)lab);
+ $label = l;
+ }
+ else {
+ err(eMsg1("label definitions must be unique per rule: '%s'", lab));
+ $label = NULL;
+ }
+ }
+ >>
+ ":"
+ ;
+
+element[int not, int first_on_line, int use_def_MT_handler] > [Node *node]
+ : <<
+ Attrib blk;
+ Predicate *pred = NULL;
+ int local_use_def_MT_handler=0;
+ ActionNode *act;
+ RuleRefNode *rr;
+ set toksrefd, rulesrefd;
+ TermEntry *term;
+ TokNode *p=NULL; RuleRefNode *q; int approx=0;
+ LabelEntry *label=NULL;
+ $node = NULL;
+ >>
+ {element_label>[label]}
+ ( TokenTerm
+ <<
+ term = (TermEntry *) hash_get(Tname, LATEXT(1));
+ if ( term==NULL && UserDefdTokens ) {
+ err("implicit token definition not allowed with #tokdefs");
+ $$.left = $$.right = NULL;
+ }
+ else {
+ $$ = buildToken(LATEXT(1));
+ p=((TokNode *)((Junction *)$$.left)->p1);
+ term = (TermEntry *) hash_get(Tname, LATEXT(1));
+ require( term!= NULL, "hash table mechanism is broken");
+ p->tclass = term->tclass;
+ p->complement = $not;
+ if ( label!=NULL ) {
+ p->el_label = label->str;
+ label->elem = (Node *)p;
+ }
+ }
+ >>
+ { ".."
+ ( QuotedTerm
+ <<if ( p!=NULL ) setUpperRange(p, LATEXT(1));>>
+ | TokenTerm
+ <<if ( p!=NULL ) setUpperRange(p, LATEXT(1));>>
+ )
+ }
+ <<
+ if ( p!=NULL && (p->upper_range!=0 || p->tclass || $not) )
+ list_add(&MetaTokenNodes, (void *)p);
+ >>
+ ( "^" <<if ( p!=NULL ) p->astnode=ASTroot;>>
+ | <<if ( p!=NULL ) p->astnode=ASTchild;>>
+ | "!" <<if ( p!=NULL ) p->astnode=ASTexclude;>>
+ )
+ { "\@" <<local_use_def_MT_handler = 1;>> }
+ <<
+ if ( p!=NULL && $first_on_line ) {
+ CurAltStart = (Junction *)$$.left;
+ p->altstart = CurAltStart;
+ }
+ if ( p!=NULL )
+ p->use_def_MT_handler = $use_def_MT_handler || local_use_def_MT_handler;
+ $node = (Node *)p;
+ >>
+ | QuotedTerm
+ <<
+ term = (TermEntry *) hash_get(Texpr, LATEXT(1));
+ if ( term==NULL && UserDefdTokens ) {
+ err("implicit token definition not allowed with #tokdefs");
+ $$.left = $$.right = NULL;
+ }
+ else {
+ $$ = buildToken(LATEXT(1)); p=((TokNode *)((Junction *)$$.left)->p1);
+ p->complement = $not;
+ if ( label!=NULL ) {
+ p->el_label = label->str;
+ label->elem = (Node *)p;
+ }
+ }
+ >>
+ { ".."
+ ( QuotedTerm
+ <<if ( p!=NULL ) setUpperRange(p, LATEXT(1));>>
+ | TokenTerm
+ <<if ( p!=NULL ) setUpperRange(p, LATEXT(1));>>
+ )
+ }
+ ( "^" <<if ( p!=NULL ) p->astnode=ASTroot;>>
+ | <<if ( p!=NULL ) p->astnode=ASTchild;>>
+ | "!" <<if ( p!=NULL ) p->astnode=ASTexclude;>>
+ )
+ { "\@" <<local_use_def_MT_handler = 1;>> }
+ <<
+ if ( p!=NULL && (p->upper_range!=0 || p->tclass || $not) )
+ list_add(&MetaTokenNodes, (void *)p);
+ >>
+ <<
+ if ( $first_on_line ) {
+ CurAltStart = (Junction *)$$.left;
+ p->altstart = CurAltStart;
+ }
+ if ( p!=NULL )
+ p->use_def_MT_handler = $use_def_MT_handler || local_use_def_MT_handler;
+ $node = (Node *)p;
+ >>
+
+ | <<if ( $not ) warn("~ WILDCARD is an undefined operation (implies 'nothing')");>>
+ "."
+ <<$$ = buildWildCard(LATEXT(1)); p=((TokNode *)((Junction *)$$.left)->p1);>>
+ ( "^" <<p->astnode=ASTroot;>>
+ | <<p->astnode=ASTchild;>>
+ | "!" <<p->astnode=ASTexclude;>>
+ )
+ <<list_add(&MetaTokenNodes, (void *)p);>>
+ <<
+ if ( $first_on_line ) {
+ CurAltStart = (Junction *)$$.left;
+ p->altstart = CurAltStart;
+ if ( label!=NULL ) {
+ p->el_label = label->str;
+ label->elem = (Node *)p;
+ }
+ }
+ $node = (Node *)p;
+ >>
+
+ | <<if ( $not ) warn("~ NONTERMINAL is an undefined operation");>>
+ NonTerminal
+ <<$$ = buildRuleRef(LATEXT(1));>>
+ { "!" <<q = (RuleRefNode *) ((Junction *)$$.left)->p1;
+ q->astnode=ASTexclude;>>
+ }
+ { {"\<"}
+ PassAction <<addParm(((Junction *)$$.left)->p1, LATEXT(1));>>
+ }
+ <<rr=(RuleRefNode *) ((Junction *)$$.left)->p1;>>
+ { <<char *a;>>
+ "\>"
+ PassAction
+ <<
+ a = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(a!=NULL, "rule element: cannot allocate assignment");
+ strcpy(a, LATEXT(1));
+ rr->assign = a;
+ >>
+ }
+ <<
+ if ( label!=NULL ) {
+ rr->el_label = label->str;
+ label->elem = (Node *)rr;
+ }
+ if ( $first_on_line ) {
+ CurAltStart = (Junction *)$$.left;
+ ((RuleRefNode *)((Junction *)$$.left)->p1)->altstart = CurAltStart;
+ }
+ $node = (Node *)rr;
+ >>
+ )
+
+ | <<if ( $not ) warn("~ ACTION is an undefined operation");>>
+ Action <<$0 = buildAction(LATEXT(1),action_file,action_line, 0);>>
+ <<if ( $first_on_line ) CurAltStart = (Junction *)$0.left;>>
+ <<$node = (Node *) ((Junction *)$0.left)->p1;>>
+
+ | <<if ( $not ) warn("~ SEMANTIC-PREDICATE is an undefined operation");>>
+ Pred <<$0 = buildAction(LATEXT(1),action_file,action_line, 1);>>
+ <<act = (ActionNode *) ((Junction *)$0.left)->p1;>>
+ { <<char *a;>>
+ PassAction
+ <<
+ a = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(a!=NULL, "rule element: cannot allocate predicate fail action");
+ strcpy(a, LATEXT(1));
+ act->pred_fail = a;
+ >>
+ }
+ <<if ( $first_on_line ) CurAltStart = (Junction *)$0.left;>>
+ <<$node = (Node *)act;>>
+
+ | <<if ( $not ) warn("~ BLOCK is an undefined operation");>>
+ <<BlkLevel++;>>
+ { "#pragma"
+ ( "approx" <<approx=LL_k;>>
+ | "LL(1)" <<approx = 1;>>
+ | "LL(2)" <<approx = 2;>>
+ )
+ }
+ ( "\(" block[&toksrefd,&rulesrefd] "\)"
+ <<blk = $$ = $2; --BlkLevel;>>
+ ( "\*" <<$$ = makeLoop($$,approx);>>
+ | "\+" <<$$ = makePlus($$,approx);>>
+ | "?"
+ ( "=>" Pred /* generalized predicate */
+ /* first make into a predicate */
+ <<$$ = buildAction(LATEXT(1),action_file,action_line,1);>>
+ <<act = (ActionNode *) ((Junction *)$$.left)->p1;>>
+ { <<char *a;>>
+ PassAction
+ <<
+ a = (char *)calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(a!=NULL, "rule element: cannot allocate predicate fail action");
+ strcpy(a, LATEXT(1));
+ act->pred_fail = a;
+ >>
+ }
+ <<if ($first_on_line) CurAltStart=(Junction *)$$.left;>>
+ <<$node = (Node *)act;>>
+
+ /* for now, just snag context */
+ <<
+ pred = computePredicateFromContextGuard(blk);
+ if ( pred==NULL )
+ err("invalid or missing context guard");
+ else {
+ pred->expr = act->action;
+ pred->source = act;
+ act->guardpred = pred;
+ }
+ >>
+ | <<$$ = makeBlk($$,approx);
+ FoundGuessBlk = 1;
+ ((Junction *) ((Junction *)$$.left)->p1)->guess=1;
+ if ( !$first_on_line ) {
+ err("(...)? predicate must be first element of production");
+ }
+ >>
+ )
+ | <<$$ = makeBlk($$,approx);>>
+ )
+ <<
+ if ( pred==NULL ) {
+ ((Junction *)((Junction *)$$.left)->p1)->blockid = CurBlockID;
+ ((Junction *)((Junction *)$$.left)->p1)->tokrefs = toksrefd;
+ ((Junction *)((Junction *)$$.left)->p1)->rulerefs = rulesrefd;
+ if ( $first_on_line )
+ CurAltStart = (Junction *)((Junction *)((Junction *)$$.left)->p1);
+ $node = (Node *) ((Junction *)$$.left)->p1;
+ }
+ >>
+
+ | "\{" block[&toksrefd,&rulesrefd]
+ <<$$ = makeOpt($2,approx); --BlkLevel;>>
+ "\}"
+ <<
+ ((Junction *)((Junction *)$$.left)->p1)->blockid = CurBlockID;
+ ((Junction *)((Junction *)$$.left)->p1)->tokrefs = toksrefd;
+ ((Junction *)((Junction *)$$.left)->p1)->rulerefs = rulesrefd;
+ >>
+ <<if ( $first_on_line )
+ CurAltStart = (Junction *) ((Junction *)((Junction *)$$.left)->p1);
+ >>
+ <<$node = (Node *) ((Junction *)$$.left)->p1;>>
+
+ )
+
+/* Error catching alternatives */
+ | "\*" <<warn("don't you want a ')' with that '*'?"); CannotContinue=TRUE;>>
+ | "\+" <<warn("don't you want a ')' with that '+'?"); CannotContinue=TRUE;>>
+ | "\>" <<warn("'>' can only appear after a nonterminal"); CannotContinue=TRUE;>>
+ | PassAction <<warn("[...] out of context 'rule > [...]'");
+ CannotContinue=TRUE;>>
+ ;
+ <<CannotContinue=TRUE;>>
+
+default_exception_handler
+ : exception_group > [DefaultExGroup]
+ ;
+
+exception_group > [ExceptionGroup *eg]
+ : <<ExceptionHandler *h; LabelEntry *label=NULL; FoundException = 1;>>
+ "exception" <<$eg = (ExceptionGroup *)calloc(1, sizeof(ExceptionGroup));>>
+ { <<char *p;>>
+ PassAction /* did they attach a label? */
+ <<
+ p = LATEXT(1)+1;
+ p[strlen(p)-1] = '\0'; /* kill trailing space */
+ label = (LabelEntry *) hash_get(Elabel, LATEXT(1)+1);
+ if ( label==NULL )
+ {
+ err(eMsg1("unknown label in exception handler: '%s'", LATEXT(1)+1));
+ }
+ >>
+ }
+ ( exception_handler > [h]
+ <<list_add(&($eg->handlers), (void *)h);>>
+ )*
+ { "default" ":" Action
+ <<{
+ ExceptionHandler *eh = (ExceptionHandler *)
+ calloc(1, sizeof(ExceptionHandler));
+ char *a = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require(eh!=NULL, "exception: cannot allocate handler");
+ require(a!=NULL, "exception: cannot allocate action");
+ strcpy(a, LATEXT(1));
+ eh->action = a;
+ eh->signalname = (char *) calloc(strlen("default")+1, sizeof(char));
+ require(eh->signalname!=NULL, "exception: cannot allocate sig name");
+ strcpy(eh->signalname, "default");
+ list_add(&($eg->handlers), (void *)eh);
+ }>>
+ }
+ <<
+ if ( label!=NULL ) {
+ /* Record ex group in sym tab for this label */
+ if ( label->ex_group!=NULL ) {
+ err(eMsg1("duplicate exception handler for label '%s'",label->str));
+ }
+ else {
+ label->ex_group = $eg;
+ /* Label the exception group itself */
+ $eg->label = label->str;
+ /* Make the labelled element pt to the exception also */
+ switch ( label->elem->ntype ) {
+ case nRuleRef :
+ {
+ RuleRefNode *r = (RuleRefNode *)label->elem;
+ r->ex_group = $eg;
+ break;
+ }
+ case nToken :
+ {
+ TokNode *t = (TokNode *)label->elem;
+ t->ex_group = $eg;
+ break;
+ }
+ }
+ }
+ /* You may want to remove this exc from the rule list
+ * and handle at the labeled element site.
+ */
+ $eg = NULL;
+ }
+ >>
+ ;
+ <<CannotContinue=TRUE;>>
+
+exception_handler > [ExceptionHandler *eh]
+ : <<char *a;>>
+ "catch"
+ <<
+ $eh = (ExceptionHandler *)calloc(1, sizeof(ExceptionHandler));
+ require($eh!=NULL, "exception: cannot allocate handler");
+ >>
+ ( NonTerminal
+ <<
+ $eh->signalname = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require($eh->signalname!=NULL, "exception: cannot allocate sig name");
+ strcpy($eh->signalname, LATEXT(1));
+ >>
+ | TokenTerm
+ <<
+ $eh->signalname = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require($eh->signalname!=NULL, "exception: cannot allocate sig name");
+ strcpy($eh->signalname, LATEXT(1));
+ >>
+ )
+ ":"
+ { <<$eh->action = NULL;>>
+ Action
+ <<
+ $eh->action = (char *) calloc(strlen(LATEXT(1))+1, sizeof(char));
+ require($eh->action!=NULL, "exception: cannot allocate action");
+ strcpy($eh->action, LATEXT(1));
+ >>
+ }
+ ;
+ <<CannotContinue=TRUE;>>
+
+#token NonTerminal "[a-z] [A-Za-z0-9_]*"
+ <<
+ while ( zzchar==' ' || zzchar=='\t' ) {
+ zzadvance();
+ }
+ if ( zzchar == ':' && inAlt ) NLA = LABEL;
+ >>
+#token TokenTerm "[A-Z] [A-Za-z0-9_]*"
+ <<
+ while ( zzchar==' ' || zzchar=='\t' ) {
+ zzadvance();
+ }
+ if ( zzchar == ':' && inAlt ) NLA = LABEL;
+ >>
+#token "#[A-Za-z0-9_]*" <<warn(eMsg1("unknown meta-op: %s",LATEXT(1))); zzskip(); >>
+
+#lexclass PARSE_ENUM_FILE
+
+#token "[\t\ ]+" << zzskip(); >> /* Ignore White */
+#token "[\n\r]" << zzline++; zzskip(); >> /* Track Line # */
+#token "//" << zzmode(TOK_DEF_CPP_COMMENTS); zzmore(); >>
+#token "/\*" << zzmode(TOK_DEF_COMMENTS); zzskip(); >>
+#token "#ifdef" << zzmode(TOK_DEF_CPP_COMMENTS); zzskip(); >>
+#token "#if" << zzmode(TOK_DEF_CPP_COMMENTS); zzskip(); >>
+#token "#ifndef" << ; >>
+#token "#else" << zzmode(TOK_DEF_CPP_COMMENTS); zzskip(); >>
+#token "#endif" << zzmode(TOK_DEF_CPP_COMMENTS); zzskip(); >>
+#token "#undef" << zzmode(TOK_DEF_CPP_COMMENTS); zzskip(); >>
+#token "#import" << zzmode(TOK_DEF_CPP_COMMENTS); zzskip(); >>
+#token "@" << ; >>
+
+enum_file[char *fname]
+ : { "#ifndef" ID
+ { "#define" ID /* ignore if it smells like a gate */
+ /* First #define after the first #ifndef (if any) is ignored */
+ }
+ }
+ ( ( enum_def[$fname] )+
+ | defines[$fname]
+ )
+ |
+ ;
+
+defines[char *fname]
+ : <<int v,maxt= -1; char *t;>>
+ (
+ "#define" ID
+ <<t = mystrdup(LATEXT(1));>>
+ INT
+ <<
+ v = atoi(LATEXT(1));
+/* fprintf(stderr, "#token %s=%d\n", t, v);*/
+ TokenNum = v;
+ if ( v>maxt ) maxt=v;
+ if ( Tnum( t ) == 0 ) addForcedTname( t, v );
+ else {
+ warnFL(eMsg1("redefinition of token %s; ignored",t),$fname,zzline);
+ }
+ >>
+ )+
+ <<TokenNum = maxt + 1;>>
+ ;
+
+enum_def[char *fname]
+ : <<int v= 0; char *t;>>
+ "enum" ID
+ "\{"
+ ID
+ <<t = mystrdup(LATEXT(1));>>
+ ( "=" INT <<v=atoi(LATEXT(1));>>
+ | <<v++;>>
+ )
+ <<
+/* fprintf(stderr, "#token %s=%d\n", t, v);*/
+ TokenNum = v;
+ if ( Tnum( t ) == 0 ) addForcedTname( t, v );
+ else {
+ warnFL(eMsg1("redefinition of token %s; ignored",t),$fname,zzline);
+ }
+ >>
+ ( ","
+ { ID
+ <<t = mystrdup(LATEXT(1));>>
+ ( "=" INT <<v=atoi(LATEXT(1));>>
+ | <<v++;>>
+ )
+ <<
+/* fprintf(stderr, "#token %s=%d\n", t, v);*/
+ TokenNum = v;
+ if ( Tnum( t ) == 0 ) addForcedTname( t, v );
+ else {
+ warnFL(eMsg1("redefinition of token %s; ignored",t),$fname,zzline);
+ }
+ >>
+ }
+ )*
+ "\}"
+ ";"
+ <<TokenNum++;>>
+ ;
+
+#token INT "[0-9]+"
+#token ID "[a-zA-Z_][_a-zA-Z0-9]*"
+
+#lexclass START
+
+<<
+/* semantics of #token */
+static void
+#ifdef __STDC__
+chkToken(char *t, char *e, char *a, int tnum)
+#else
+chkToken(t,e,a,tnum)
+char *t, *e, *a;
+int tnum;
+#endif
+{
+ TermEntry *p;
+
+ /* check to see that they don't try to redefine a token as a token class */
+ if ( t!=NULL ) {
+ p = (TermEntry *) hash_get(Tname, t);
+ if ( p!=NULL && p->classname ) {
+ err(eMsg1("redefinition of #tokclass '%s' to #token not allowed; ignored",t));
+ if ( a!=NULL ) free((char *)a);
+ return;
+ }
+ }
+
+ if ( t==NULL && e==NULL ) { /* none found */
+ err("#token requires at least token name or rexpr");
+ }
+ else if ( t!=NULL && e!=NULL ) { /* both found */
+ if ( UserDefdTokens ) { /* if #tokdefs, must not define new */
+ p = (TermEntry *) hash_get(Tname, t);
+ if ( p==NULL ) {
+ err(eMsg1("#token definition '%s' not allowed with #tokdefs; ignored",t));
+ return;
+ }
+ }
+ Tklink(t, e);
+ if ( a!=NULL ) {
+ if ( hasAction(e) ) {
+ err(eMsg1("redefinition of action for %s; ignored",e));
+ }
+ else setHasAction(e, a);
+ }
+ }
+ else if ( t!=NULL ) { /* only one found */
+ if ( UserDefdTokens ) {
+ err(eMsg1("#token definition '%s' not allowed with #tokdefs; ignored",t));
+ return;
+ }
+ if ( Tnum( t ) == 0 ) addTname( t );
+ else {
+ err(eMsg1("redefinition of token %s; ignored",t));
+ }
+ if ( a!=NULL ) {
+ err(eMsg1("action cannot be attached to a token name (%s); ignored",t));
+ free((char *)a);
+ }
+ }
+ else if ( e!=NULL ) {
+ if ( Tnum( e ) == 0 ) addTexpr( e );
+ else {
+ if ( hasAction(e) ) {
+ err(eMsg1("redefinition of action for expr %s; ignored",e));
+ }
+ else if ( a==NULL ) {
+ err(eMsg1("redefinition of expr %s; ignored",e));
+ }
+ }
+ if ( a!=NULL ) setHasAction(e, a);
+ }
+
+ /* if a token type number was specified, then add the token ID and 'tnum'
+ * pair to the ForcedTokens list. (only applies if an id was given)
+ */
+ if ( t!=NULL && tnum>0 )
+ {
+ if ( set_el(tnum, reserved_positions) )
+ {
+ err(eMsgd("a token has already been forced to token number %d; ignored", tnum));
+ }
+ else
+ {
+ list_add(&ForcedTokens, newForcedToken(t,tnum));
+ set_orel(tnum, &reserved_positions);
+ }
+ }
+}
+>>
+
+<<
+static int
+#ifdef __USE_PROTOS
+match_token(char *s, char **nxt)
+#else
+match_token(s,nxt)
+char *s;
+char **nxt;
+#endif
+{
+ if ( !(*s>='A' && *s<='Z') ) return 0;
+ s++;
+ while ( (*s>='a' && *s<='z') ||
+ (*s>='A' && *s<='Z') ||
+ (*s>='0' && *s<='9') ||
+ *s=='_' )
+ {
+ s++;
+ }
+ if ( *s!=' ' && *s!='}' ) return 0;
+ *nxt = s;
+ return 1;
+}
+
+static int
+#ifdef __USE_PROTOS
+match_rexpr(char *s, char **nxt)
+#else
+match_rexpr(s,nxt)
+char *s;
+char **nxt;
+#endif
+{
+ if ( *s!='"' ) return 0;
+ s++;
+ while ( *s!='"' )
+ {
+ if ( *s=='\n' )
+ warn("eoln found in regular expression");
+ if ( *s=='\\' ) s++;
+ s++;
+ }
+ *nxt = s+1;
+ return 1;
+}
+
+/*
+ * Walk a string "{ A .. Z }" where A..Z is a space separated list
+ * of token references (either labels or reg exprs). Return a
+ * string "inlineX_set" for some unique integer X. Basically,
+ * we pretend as if we had seen "#tokclass inlineX { A .. Z }"
+ * on the input stream outside of an action.
+ */
+char *
+#ifdef __USE_PROTOS
+inline_set(char *s)
+#else
+inline_set(s)
+char *s;
+#endif
+{
+ char *nxt;
+ fprintf(stderr, "found consumeUntil( {...} )\n");
+ while ( *s==' ' || *s=='\t' || *s=='\n' || *s=='\r' ) {s++;}
+ if ( *s!='{' )
+ {
+ err("malformed consumeUntil( {...} ); missing '{'");
+ return "bad_set";
+ }
+ s++;
+ while ( *s==' ' || *s=='\t' || *s=='\n' || *s=='\r' ) {s++;}
+ while ( *s!='}' )
+ {
+ if ( match_token(s,&nxt) ) fprintf(stderr, "found token %s\n", s);
+ else if ( match_rexpr(s,&nxt) ) fprintf(stderr, "found rexpr %s\n", s);
+ else {
+ err("invalid element in consumeUntil( {...} )");
+ return "bad_set";
+ }
+ s = nxt;
+ while ( *s==' ' || *s=='\t' || *s=='\n' || *s=='\r' ) {s++;}
+ }
+ return "inlineX_set";
+}
+>>
+
+<<
+/* ANTLR-specific syntax error message generator
+ * (define USER_ZZSYN when compiling so don't get 2 definitions)
+ */
+void
+#ifdef __STDC__
+zzsyn(char *text, int tok, char *egroup, SetWordType *eset, int etok,
+int k, char *bad_text)
+#else
+zzsyn(text, tok, egroup, eset, etok, k, bad_text)
+char *text, *egroup, *bad_text;
+int tok;
+int etok;
+int k;
+SetWordType *eset;
+#endif
+{
+ fprintf(stderr, ErrHdr, FileStr[CurFile]!=NULL?FileStr[CurFile]:"stdin", zzline);
+ fprintf(stderr, " syntax error at \"%s\"", (tok==zzEOF_TOKEN)?"EOF":text);
+ if ( !etok && !eset ) {fprintf(stderr, "\n"); return;}
+ if ( k==1 ) fprintf(stderr, " missing");
+ else
+ {
+ fprintf(stderr, "; \"%s\" not", bad_text);
+ if ( zzset_deg(eset)>1 ) fprintf(stderr, " in");
+ }
+ if ( zzset_deg(eset)>0 ) zzedecode(eset);
+ else fprintf(stderr, " %s", zztokens[etok]);
+ if ( strlen(egroup) > (size_t)0 ) fprintf(stderr, " in %s", egroup);
+ fprintf(stderr, "\n");
+}
+>>
projects / pccts / commitdiff