globle struct expr *GetRHSPattern(
char *readSource,
struct token *tempToken,
int *error,
int constantsOnly,
int readFirstParen,
int checkFirstParen,
int endType)
{
struct expr *lastOne = NULL;
struct expr *nextOne, *firstOne, *argHead = NULL;
int printError, count;
struct deftemplate *theDeftemplate;
struct symbolHashNode *templateName;
/*=================================================*/
/* Get the opening parenthesis of the RHS pattern. */
/*=================================================*/
*error = FALSE;
if (readFirstParen) GetToken(readSource,tempToken);
if (checkFirstParen)
{
if (tempToken->type == endType) return(NULL);
if (tempToken->type != LPAREN)
{
SyntaxErrorMessage("RHS patterns");
*error = TRUE;
return(NULL);
}
}
/*======================================================*/
/* The first field of an asserted fact must be a symbol */
/* (but not = or : which have special significance). */
/*======================================================*/
GetToken(readSource,tempToken);
if (tempToken->type != SYMBOL)
{
SyntaxErrorMessage("first field of a RHS pattern");
*error = TRUE;
return(NULL);
}
else if ((strcmp(ValueToString(tempToken->value),"=") == 0) ||
(strcmp(ValueToString(tempToken->value),":") == 0))
{
SyntaxErrorMessage("first field of a RHS pattern");
*error = TRUE;
return(NULL);
}
/*=========================================================*/
/* Check to see if the relation name is a reserved symbol. */
/*=========================================================*/
templateName = (struct symbolHashNode *) tempToken->value;
if (ReservedPatternSymbol(ValueToString(templateName),NULL))
{
ReservedPatternSymbolErrorMsg(ValueToString(templateName),"a relation name");
*error = TRUE;
return(NULL);
}
/*============================================================*/
/* A module separator in the name is illegal in this context. */
/*============================================================*/
if (FindModuleSeparator(ValueToString(templateName)))
{
IllegalModuleSpecifierMessage();
*error = TRUE;
return(NULL);
}
/*=============================================================*/
/* Determine if there is an associated deftemplate. If so, let */
/* the deftemplate parsing functions parse the RHS pattern and */
/* then return the fact pattern that was parsed. */
/*=============================================================*/
theDeftemplate = (struct deftemplate *)
FindImportedConstruct("deftemplate",NULL,ValueToString(templateName),
&count,TRUE,NULL);
if (count > 1)
{
AmbiguousReferenceErrorMessage("deftemplate",ValueToString(templateName));
*error = TRUE;
return(NULL);
}
/*======================================================*/
/* If no deftemplate exists with the specified relation */
/* name, then create an implied deftemplate. */
/*======================================================*/
if (theDeftemplate == NULL)
#if (! BLOAD_ONLY) && (! RUN_TIME)
{
#if BLOAD || BLOAD_AND_BSAVE
if ((Bloaded()) && (! CheckSyntaxMode))
{
NoSuchTemplateError(ValueToString(templateName));
*error = TRUE;
return(NULL);
}
#endif
#if DEFMODULE_CONSTRUCT
if (FindImportExportConflict("deftemplate",((struct defmodule *) GetCurrentModule()),ValueToString(templateName)))
{
ImportExportConflictMessage("implied deftemplate",ValueToString(templateName),NULL,NULL);
*error = TRUE;
return(NULL);
}
#endif
if (! CheckSyntaxMode)
{ theDeftemplate = CreateImpliedDeftemplate((SYMBOL_HN *) templateName,TRUE); }
}
#else
{
NoSuchTemplateError(ValueToString(templateName));
*error = TRUE;
return(NULL);
}
#endif
/*=========================================*/
/* If an explicit deftemplate exists, then */
/* parse the fact as a deftemplate fact. */
/*=========================================*/
if ((theDeftemplate != NULL) && (theDeftemplate->implied == FALSE))
{
firstOne = GenConstant(DEFTEMPLATE_PTR,theDeftemplate);
firstOne->nextArg = ParseAssertTemplate(readSource,tempToken,
error,endType,
constantsOnly,theDeftemplate);
if (*error)
{
ReturnExpression(firstOne);
firstOne = NULL;
}
return(firstOne);
}
/*========================================*/
/* Parse the fact as an ordered RHS fact. */
/*========================================*/
firstOne = GenConstant(DEFTEMPLATE_PTR,theDeftemplate);
#if (! RUN_TIME) && (! BLOAD_ONLY)
SavePPBuffer(" ");
#endif
while ((nextOne = GetAssertArgument(readSource,tempToken,
error,endType,constantsOnly,&printError)) != NULL)
{
if (argHead == NULL) argHead = nextOne;
else lastOne->nextArg = nextOne;
lastOne = nextOne;
#if (! RUN_TIME) && (! BLOAD_ONLY)
SavePPBuffer(" ");
#endif
}
/*===========================================================*/
/* If an error occurred, set the error flag and return NULL. */
/*===========================================================*/
if (*error)
{
if (printError) SyntaxErrorMessage("RHS patterns");
ReturnExpression(firstOne);
ReturnExpression(argHead);
return(NULL);
}
/*=====================================*/
/* Fix the pretty print representation */
/* of the RHS ordered fact. */
/*=====================================*/
#if (! RUN_TIME) && (! BLOAD_ONLY)
PPBackup();
PPBackup();
SavePPBuffer(tempToken->printForm);
#endif
/*==========================================================*/
/* Ordered fact assertions are processed by stuffing all of */
/* the fact's proposition (except the relation name) into a */
/* single multifield slot. */
/*==========================================================*/
firstOne->nextArg = GenConstant(FACT_STORE_MULTIFIELD,AddBitMap("\0",1));
firstOne->nextArg->argList = argHead;
/*==============================*/
/* Return the RHS ordered fact. */
/*==============================*/
return(firstOne);
}
globle struct lhsParseNode *FactPatternParse(
void *theEnv,
char *readSource,
struct token *theToken)
{
struct deftemplate *theDeftemplate;
int count;
/*=========================================*/
/* A module separator can not be included */
/* as part of the pattern's relation name. */
/*=========================================*/
if (FindModuleSeparator(ValueToString(theToken->value)))
{
IllegalModuleSpecifierMessage(theEnv);
return(NULL);
}
/*=========================================================*/
/* Find the deftemplate associated with the relation name. */
/*=========================================================*/
theDeftemplate = (struct deftemplate *)
FindImportedConstruct(theEnv,"deftemplate",NULL,ValueToString(theToken->value),
&count,TRUE,NULL);
if (count > 1)
{
AmbiguousReferenceErrorMessage(theEnv,"deftemplate",ValueToString(theToken->value));
return(NULL);
}
/*======================================================*/
/* If no deftemplate exists with the specified relation */
/* name, then create an implied deftemplate. */
/*======================================================*/
if (theDeftemplate == NULL)
{
#if DEFMODULE_CONSTRUCT
if (FindImportExportConflict(theEnv,"deftemplate",((struct defmodule *) EnvGetCurrentModule(theEnv)),ValueToString(theToken->value)))
{
ImportExportConflictMessage(theEnv,"implied deftemplate",ValueToString(theToken->value),NULL,NULL);
return(NULL);
}
#endif /* DEFMODULE_CONSTRUCT */
if (! ConstructData(theEnv)->CheckSyntaxMode)
{ theDeftemplate = CreateImpliedDeftemplate(theEnv,(SYMBOL_HN *) theToken->value,TRUE); }
else
{ theDeftemplate = NULL; }
}
/*===============================================*/
/* If an explicit deftemplate exists, then parse */
/* the pattern as a deftemplate pattern. */
/*===============================================*/
if ((theDeftemplate != NULL) && (theDeftemplate->implied == FALSE))
{ return(DeftemplateLHSParse(theEnv,readSource,theDeftemplate)); }
/*================================*/
/* Parse an ordered fact pattern. */
/*================================*/
return(SequenceRestrictionParse(theEnv,readSource,theToken));
}
globle SYMBOL_HN *GetConstructNameAndComment(
void *theEnv,
char *readSource,
struct token *inputToken,
char *constructName,
void *(*findFunction)(void *,char *),
int (*deleteFunction)(void *,void *),
char *constructSymbol,
int fullMessageCR,
int getComment,
int moduleNameAllowed)
{
#if (MAC_MCW || WIN_MCW || MAC_XCD) && (! DEBUGGING_FUNCTIONS)
#pragma unused(fullMessageCR)
#endif
SYMBOL_HN *name, *moduleName;
int redefining = FALSE;
void *theConstruct;
unsigned separatorPosition;
struct defmodule *theModule;
/*==========================*/
/* Next token should be the */
/* name of the construct. */
/*==========================*/
GetToken(theEnv,readSource,inputToken);
if (inputToken->type != SYMBOL)
{
PrintErrorID(theEnv,"CSTRCPSR",2,TRUE);
EnvPrintRouter(theEnv,WERROR,"Missing name for ");
EnvPrintRouter(theEnv,WERROR,constructName);
EnvPrintRouter(theEnv,WERROR," construct\n");
return(NULL);
}
name = (SYMBOL_HN *) inputToken->value;
/*===============================*/
/* Determine the current module. */
/*===============================*/
separatorPosition = FindModuleSeparator(ValueToString(name));
if (separatorPosition)
{
if (moduleNameAllowed == FALSE)
{
SyntaxErrorMessage(theEnv,"module specifier");
return(NULL);
}
moduleName = ExtractModuleName(theEnv,separatorPosition,ValueToString(name));
if (moduleName == NULL)
{
SyntaxErrorMessage(theEnv,"construct name");
return(NULL);
}
theModule = (struct defmodule *) EnvFindDefmodule(theEnv,ValueToString(moduleName));
if (theModule == NULL)
{
CantFindItemErrorMessage(theEnv,"defmodule",ValueToString(moduleName));
return(NULL);
}
EnvSetCurrentModule(theEnv,(void *) theModule);
name = ExtractConstructName(theEnv,separatorPosition,ValueToString(name));
if (name == NULL)
{
SyntaxErrorMessage(theEnv,"construct name");
return(NULL);
}
}
/*=====================================================*/
/* If the module was not specified, record the current */
/* module name as part of the pretty-print form. */
/*=====================================================*/
else
{
theModule = ((struct defmodule *) EnvGetCurrentModule(theEnv));
if (moduleNameAllowed)
{
PPBackup(theEnv);
SavePPBuffer(theEnv,EnvGetDefmoduleName(theEnv,theModule));
SavePPBuffer(theEnv,"::");
SavePPBuffer(theEnv,ValueToString(name));
}
}
/*==================================================================*/
/* Check for import/export conflicts from the construct definition. */
/*==================================================================*/
#if DEFMODULE_CONSTRUCT
if (FindImportExportConflict(theEnv,constructName,theModule,ValueToString(name)))
{
ImportExportConflictMessage(theEnv,constructName,ValueToString(name),NULL,NULL);
return(NULL);
}
#endif
/*========================================================*/
/* Remove the construct if it is already in the knowledge */
/* base and we're not just checking syntax. */
/*========================================================*/
if ((findFunction != NULL) && (! ConstructData(theEnv)->CheckSyntaxMode))
{
theConstruct = (*findFunction)(theEnv,ValueToString(name));
if (theConstruct != NULL)
{
redefining = TRUE;
if (deleteFunction != NULL)
{
if ((*deleteFunction)(theEnv,theConstruct) == FALSE)
{
PrintErrorID(theEnv,"CSTRCPSR",4,TRUE);
EnvPrintRouter(theEnv,WERROR,"Cannot redefine ");
EnvPrintRouter(theEnv,WERROR,constructName);
EnvPrintRouter(theEnv,WERROR," ");
EnvPrintRouter(theEnv,WERROR,ValueToString(name));
EnvPrintRouter(theEnv,WERROR," while it is in use.\n");
return(NULL);
}
}
}
}
/*=============================================*/
/* If compilations are being watched, indicate */
/* that a construct is being compiled. */
/*=============================================*/
#if DEBUGGING_FUNCTIONS
if ((EnvGetWatchItem(theEnv,"compilations") == TRUE) &&
GetPrintWhileLoading(theEnv) && (! ConstructData(theEnv)->CheckSyntaxMode))
{
if (redefining)
{
PrintWarningID(theEnv,"CSTRCPSR",1,TRUE);
EnvPrintRouter(theEnv,WDIALOG,"Redefining ");
}
else EnvPrintRouter(theEnv,WDIALOG,"Defining ");
EnvPrintRouter(theEnv,WDIALOG,constructName);
EnvPrintRouter(theEnv,WDIALOG,": ");
EnvPrintRouter(theEnv,WDIALOG,ValueToString(name));
if (fullMessageCR) EnvPrintRouter(theEnv,WDIALOG,"\n");
else EnvPrintRouter(theEnv,WDIALOG," ");
}
else
#endif
{
if (GetPrintWhileLoading(theEnv) && (! ConstructData(theEnv)->CheckSyntaxMode))
{ EnvPrintRouter(theEnv,WDIALOG,constructSymbol); }
}
/*===============================*/
/* Get the comment if it exists. */
/*===============================*/
GetToken(theEnv,readSource,inputToken);
if ((inputToken->type == STRING) && getComment)
{
PPBackup(theEnv);
SavePPBuffer(theEnv," ");
SavePPBuffer(theEnv,inputToken->printForm);
GetToken(theEnv,readSource,inputToken);
if (inputToken->type != RPAREN)
{
PPBackup(theEnv);
SavePPBuffer(theEnv,"\n ");
SavePPBuffer(theEnv,inputToken->printForm);
}
}
else if (inputToken->type != RPAREN)
{
PPBackup(theEnv);
SavePPBuffer(theEnv,"\n ");
SavePPBuffer(theEnv,inputToken->printForm);
}
/*===================================*/
/* Return the name of the construct. */
/*===================================*/
return(name);
}
static intBool GetVariableDefinition(
void *theEnv,
char *readSource,
int *defglobalError,
int tokenRead,
struct token *theToken)
{
SYMBOL_HN *variableName;
struct expr *assignPtr;
DATA_OBJECT assignValue;
/*========================================*/
/* Get next token, which should either be */
/* a closing parenthesis or a variable. */
/*========================================*/
if (! tokenRead) GetToken(theEnv,readSource,theToken);
if (theToken->type == RPAREN) return(FALSE);
if (theToken->type == SF_VARIABLE)
{
SyntaxErrorMessage(theEnv,"defglobal");
*defglobalError = TRUE;
return(FALSE);
}
else if (theToken->type != GBL_VARIABLE)
{
SyntaxErrorMessage(theEnv,"defglobal");
*defglobalError = TRUE;
return(FALSE);
}
variableName = (SYMBOL_HN *) theToken->value;
SavePPBuffer(theEnv," ");
/*================================*/
/* Print out compilation message. */
/*================================*/
#if DEBUGGING_FUNCTIONS
if ((EnvGetWatchItem(theEnv,"compilations") == ON) && GetPrintWhileLoading(theEnv))
{
if (QFindDefglobal(theEnv,variableName) != NULL)
{
PrintWarningID(theEnv,"CSTRCPSR",1,TRUE);
EnvPrintRouter(theEnv,WDIALOG,"Redefining defglobal: ");
}
else EnvPrintRouter(theEnv,WDIALOG,"Defining defglobal: ");
EnvPrintRouter(theEnv,WDIALOG,ValueToString(variableName));
EnvPrintRouter(theEnv,WDIALOG,"\n");
}
else
#endif
{ if (GetPrintWhileLoading(theEnv)) EnvPrintRouter(theEnv,WDIALOG,":"); }
/*==================================================================*/
/* Check for import/export conflicts from the construct definition. */
/*==================================================================*/
#if DEFMODULE_CONSTRUCT
if (FindImportExportConflict(theEnv,"defglobal",((struct defmodule *) EnvGetCurrentModule(theEnv)),ValueToString(variableName)))
{
ImportExportConflictMessage(theEnv,"defglobal",ValueToString(variableName),NULL,NULL);
*defglobalError = TRUE;
return(FALSE);
}
#endif
/*==============================*/
/* The next token must be an =. */
/*==============================*/
GetToken(theEnv,readSource,theToken);
if (strcmp(theToken->printForm,"=") != 0)
{
SyntaxErrorMessage(theEnv,"defglobal");
*defglobalError = TRUE;
return(FALSE);
}
SavePPBuffer(theEnv," ");
/*======================================================*/
/* Parse the expression to be assigned to the variable. */
/*======================================================*/
assignPtr = ParseAtomOrExpression(theEnv,readSource,NULL);
if (assignPtr == NULL)
{
*defglobalError = TRUE;
return(FALSE);
}
/*==========================*/
/* Evaluate the expression. */
/*==========================*/
if (! ConstructData(theEnv)->CheckSyntaxMode)
{
SetEvaluationError(theEnv,FALSE);
if (EvaluateExpression(theEnv,assignPtr,&assignValue))
{
ReturnExpression(theEnv,assignPtr);
*defglobalError = TRUE;
return(FALSE);
}
}
else
{ ReturnExpression(theEnv,assignPtr); }
SavePPBuffer(theEnv,")");
/*======================================*/
/* Add the variable to the global list. */
/*======================================*/
if (! ConstructData(theEnv)->CheckSyntaxMode)
{ AddDefglobal(theEnv,variableName,&assignValue,assignPtr); }
/*==================================================*/
/* Return TRUE to indicate that the global variable */
/* definition was successfully parsed. */
/*==================================================*/
return(TRUE);
}
globle struct expr *GetRHSPattern(
char *readSource,
struct token *tempToken,
int *error,
int constantsOnly,
int readFirstParen,
int checkFirstParen,
int endType)
{
struct expr *lastOne = NULL;
struct expr *nextOne, *firstOne, *argHead = NULL;
int printError, count;
struct deftemplate *theDeftemplate;
struct symbolHashNode *templateName;
/*=================================================*/
/* Get the opening parenthesis of the RHS pattern. */
/*=================================================*/
*error = FALSE;
if (readFirstParen) GetToken(readSource,tempToken);
if (checkFirstParen)
{
if (tempToken->type == endType) return(NULL);
if (tempToken->type != LPAREN)
{
SyntaxErrorMessage("RHS patterns");
*error = TRUE;
return(NULL);
}
}
/*======================================================*/
/* The first field of an asserted fact must be a symbol */
/* (but not = or : which have special significance). */
/*======================================================*/
GetToken(readSource,tempToken);
if (tempToken->type != SYMBOL)
{
SyntaxErrorMessage("first field of a RHS pattern");
*error = TRUE;
return(NULL);
}
else if ((strcmp(ValueToString(tempToken->value),"=") == 0) ||
(strcmp(ValueToString(tempToken->value),":") == 0))
{
SyntaxErrorMessage("first field of a RHS pattern");
*error = TRUE;
return(NULL);
}
/*=========================================================*/
/* Check to see if the relation name is a reserved symbol. */
/*=========================================================*/
templateName = (struct symbolHashNode *) tempToken->value;
if (ReservedPatternSymbol(ValueToString(templateName),NULL))
{
ReservedPatternSymbolErrorMsg(ValueToString(templateName),"a relation name");
*error = TRUE;
return(NULL);
}
/*============================================================*/
/* A module separator in the name is illegal in this context. */
/*============================================================*/
if (FindModuleSeparator(ValueToString(templateName)))
{
IllegalModuleSpecifierMessage();
*error = TRUE;
return(NULL);
}
/*=============================================================*/
/* Determine if there is an associated deftemplate. If so, let */
/* the deftemplate parsing functions parse the RHS pattern and */
/* then return the fact pattern that was parsed. */
/*=============================================================*/
theDeftemplate = (struct deftemplate *)
FindImportedConstruct("deftemplate",NULL,ValueToString(templateName),
&count,TRUE,NULL);
if (count > 1)
{
AmbiguousReferenceErrorMessage("deftemplate",ValueToString(templateName));
*error = TRUE;
return(NULL);
}
/*======================================================*/
/* If no deftemplate exists with the specified relation */
/* name, then create an implied deftemplate. */
/*======================================================*/
if (theDeftemplate == NULL)
#if (! BLOAD_ONLY) && (! RUN_TIME)
{
#if BLOAD || BLOAD_AND_BSAVE
if ((Bloaded()) && (! CheckSyntaxMode))
{
NoSuchTemplateError(ValueToString(templateName));
*error = TRUE;
return(NULL);
}
#endif
#if DEFMODULE_CONSTRUCT
if (FindImportExportConflict("deftemplate",((struct defmodule *) GetCurrentModule()),ValueToString(templateName)))
{
ImportExportConflictMessage("implied deftemplate",ValueToString(templateName),NULL,NULL);
*error = TRUE;
return(NULL);
}
#endif
if (! CheckSyntaxMode)
{ theDeftemplate = CreateImpliedDeftemplate((SYMBOL_HN *) templateName,TRUE); }
}
#else
{
NoSuchTemplateError(ValueToString(templateName));
*error = TRUE;
return(NULL);
}
#endif
/*=========================================*/
/* If an explicit deftemplate exists, then */
/* parse the fact as a deftemplate fact. */
/*=========================================*/
if ((theDeftemplate != NULL) && (theDeftemplate->implied == FALSE))
{
firstOne = GenConstant(DEFTEMPLATE_PTR,theDeftemplate);
#if FUZZY_DEFTEMPLATES
if (theDeftemplate->fuzzyTemplate != NULL)
firstOne->nextArg = ParseAssertFuzzyFact(readSource,tempToken,
error,endType,
constantsOnly,theDeftemplate,
TRUE);
else
#endif
firstOne->nextArg = ParseAssertTemplate(readSource,tempToken,
error,endType,
constantsOnly,theDeftemplate);
if (*error)
{
ReturnExpression(firstOne);
firstOne = NULL;
}
#if CERTAINTY_FACTORS
else
{
/* if certaintly factors allowed then the next item after a fact
specifier COULD be a certainty factor spec --- CF x.xxx
*/
SavePPBuffer(" ");
GetToken(readSource,tempToken);
if ((tempToken->type == SYMBOL) &&
((strcmp(ValueToString(tempToken->value),"CF") == 0) ||
(strcmp(ValueToString(tempToken->value),"cf") == 0))
)
{
struct expr *CFexpr;
/* expecting a certainty factor (float) expression */
/* tokenToFloatExpression expect 1st token already read */
SavePPBuffer(" ");
GetToken(readSource,tempToken);
CFexpr = tokenToFloatExpression(readSource,tempToken,error,constantsOnly);
if (*error)
{
ReturnExpression(firstOne);
return( NULL );
}
if (CFexpr->type == FLOAT) /* if constant -- check range */
{
double cfval = ValueToDouble(CFexpr->value);
if (cfval > 1.0 || cfval < 0.0)
{
*error = TRUE;
ReturnExpression(CFexpr);
cfRangeError();
ReturnExpression(firstOne);
return( NULL );
}
}
/* store the CF expression in the argList of the DEFTEMPLATE_PTR expr */
firstOne->argList = CFexpr;
}
else
{
/* Do an 'UnGetToken' function here to undo the lookahead for a CF.
Also need to PPBackup over the space added before reading the
potential CF expression -- UnGetToken does one PPBackup over the
token which was added to the PP Buffer
*/
UnGetToken(tempToken);
PPBackup();
}
}
#endif
return(firstOne);
}
/*========================================*/
/* Parse the fact as an ordered RHS fact. */
/*========================================*/
firstOne = GenConstant(DEFTEMPLATE_PTR,theDeftemplate);
#if FUZZY_DEFTEMPLATES
/*=============================================*/
/* Fuzzy facts parsed differently */
/*=============================================*/
if (theDeftemplate->fuzzyTemplate != NULL)
{
firstOne->nextArg = ParseAssertFuzzyFact(readSource,tempToken,
error,endType,
constantsOnly,theDeftemplate,
TRUE);
if (*error)
{
ReturnExpression(firstOne);
return(NULL);
}
}
else
{ /* --- matches } below with FUZZY_DEFTEMPLATES */
#endif /* FUZZY_DEFTEMPLATES */
#if (! RUN_TIME) && (! BLOAD_ONLY)
SavePPBuffer(" ");
#endif
while ((nextOne = GetAssertArgument(readSource,tempToken,
error,endType,constantsOnly,&printError)) != NULL)
{
if (argHead == NULL) argHead = nextOne;
else lastOne->nextArg = nextOne;
lastOne = nextOne;
#if (! RUN_TIME) && (! BLOAD_ONLY)
SavePPBuffer(" ");
#endif
}
/*===========================================================*/
/* If an error occurred, set the error flag and return NULL. */
/*===========================================================*/
if (*error)
{
if (printError) SyntaxErrorMessage("RHS patterns");
ReturnExpression(firstOne);
ReturnExpression(argHead);
return(NULL);
}
/*=====================================*/
/* Fix the pretty print representation */
/* of the RHS ordered fact. */
/*=====================================*/
#if (! RUN_TIME) && (! BLOAD_ONLY)
PPBackup();
PPBackup();
SavePPBuffer(tempToken->printForm);
#endif
/*==========================================================*/
/* Ordered fact assertions are processed by stuffing all of */
/* the fact's proposition (except the relation name) into a */
/* single multifield slot. */
/*==========================================================*/
firstOne->nextArg = GenConstant(FACT_STORE_MULTIFIELD,AddBitMap("\0",1));
firstOne->nextArg->argList = argHead;
#if FUZZY_DEFTEMPLATES
} /* --- matches else { above with FUZZY_DEFTEMPLATES */
#endif
#if CERTAINTY_FACTORS
/* if certaintly factors allowed then the next item after a fact
specifier could be a certainty factor spec --- CF x.xxx
*/
#if (! RUN_TIME) && (! BLOAD_ONLY)
SavePPBuffer(" ");
#endif
GetToken(readSource,tempToken);
if ((tempToken->type == SYMBOL) &&
((strcmp(ValueToString(tempToken->value),"CF") == 0) ||
(strcmp(ValueToString(tempToken->value),"cf") == 0))
)
{
struct expr *CFexpr;
/* expecting a certainty factor (float) expression */
/* tokenToFloatExpression expect 1st token already read */
#if (! RUN_TIME) && (! BLOAD_ONLY)
SavePPBuffer(" ");
#endif
GetToken(readSource,tempToken);
CFexpr = tokenToFloatExpression(readSource,tempToken,error,constantsOnly);
if (*error)
{
ReturnExpression(firstOne);
return( NULL );
}
if (CFexpr->type == FLOAT) /* if constant -- check range */
{
double cfval = ValueToDouble(CFexpr->value);
if (cfval > 1.0 || cfval < 0.0)
{
*error = TRUE;
ReturnExpression(CFexpr);
cfRangeError();
ReturnExpression(firstOne);
return( NULL );
}
}
/* store the CF expression in the argList of the DEFTEMPLATE_PTR expr */
firstOne->argList = CFexpr;
}
else
{
/* Do an 'UnGetToken' function here to undo the lookahead for a CF.
Also need to PPBackup over the space added before reading the
potential CF expression -- UnGetToken does one PPBackup over the
token which was added to the PP Buffer
*/
UnGetToken(tempToken);
#if (! RUN_TIME) && (! BLOAD_ONLY)
PPBackup();
#endif
}
#endif /* CERTAINTY_FACTORS */
/*==============================*/
/* Return the RHS ordered fact. */
/*==============================*/
return(firstOne);
}
