/***************************************************
NAME : ReplaceClassNameWithReference
DESCRIPTION : In parsing a make instance call,
this function replaces a constant
class name with an actual pointer
to the class
INPUTS : The expression
RETURNS : TRUE if all OK, FALSE
if class cannot be found
SIDE EFFECTS : The expression type and value are
modified if class is found
NOTES : Searches current nd imported
modules for reference
CHANGES : It's now possible to create an instance of a
class that's not in scope if the module name
is specified.
***************************************************/
static intBool ReplaceClassNameWithReference(
void *theEnv,
EXPRESSION *theExp)
{
const char *theClassName;
void *theDefclass;
if (theExp->type == SYMBOL)
{
theClassName = ValueToString(theExp->value);
//theDefclass = (void *) LookupDefclassInScope(theEnv,theClassName);
theDefclass = (void *) LookupDefclassByMdlOrScope(theEnv,theClassName); // Module or scope is now allowed
if (theDefclass == NULL)
{
CantFindItemErrorMessage(theEnv,"class",theClassName);
return(FALSE);
}
if (EnvClassAbstractP(theEnv,theDefclass))
{
PrintErrorID(theEnv,"INSMNGR",3,FALSE);
EnvPrintRouter(theEnv,WERROR,"Cannot create instances of abstract class ");
EnvPrintRouter(theEnv,WERROR,theClassName);
EnvPrintRouter(theEnv,WERROR,".\n");
return(FALSE);
}
theExp->type = DEFCLASS_PTR;
theExp->value = theDefclass;
#if (! RUN_TIME) && (! BLOAD_ONLY)
if (! ConstructData(theEnv)->ParsingConstruct)
{ ConstructData(theEnv)->DanglingConstructs++; }
#endif
}
return(TRUE);
}
/***************************************************
NAME : ReplaceClassNameWithReference
DESCRIPTION : In parsing a make instance call,
this function replaces a constant
class name with an actual pointer
to the class
INPUTS : The expression
RETURNS : TRUE if all OK, FALSE
if class cannot be found
SIDE EFFECTS : The expression type and value are
modified if class is found
NOTES : Searches current nd imported
modules for reference
***************************************************/
static intBool ReplaceClassNameWithReference(
void *theEnv,
EXPRESSION *theExp)
{
char *theClassName;
void *theDefclass;
if (theExp->type == SYMBOL)
{
theClassName = ValueToString(theExp->value);
theDefclass = (void *) LookupDefclassInScope(theEnv,theClassName);
if (theDefclass == NULL)
{
CantFindItemErrorMessage(theEnv,(char*)"class",theClassName);
return(FALSE);
}
if (EnvClassAbstractP(theEnv,theDefclass))
{
PrintErrorID(theEnv,(char*)"INSMNGR",3,FALSE);
EnvPrintRouter(theEnv,WERROR,(char*)"Cannot create instances of abstract class ");
EnvPrintRouter(theEnv,WERROR,theClassName);
EnvPrintRouter(theEnv,WERROR,(char*)".\n");
return(FALSE);
}
theExp->type = DEFCLASS_PTR;
theExp->value = theDefclass;
}
return(TRUE);
}
/*********************************************************************
NAME : ClassAbstractPCommand
DESCRIPTION : Determines if direct instances of a class can be made
INPUTS : None
RETURNS : TRUE (1) if class is abstract, FALSE (0) if concrete
SIDE EFFECTS : None
NOTES : Syntax: (class-abstractp <class>)
*********************************************************************/
globle int ClassAbstractPCommand(
void *theEnv)
{
DATA_OBJECT tmp;
DEFCLASS *cls;
if (EnvArgTypeCheck(theEnv,"class-abstractp",1,SYMBOL,&tmp) == FALSE)
return(FALSE);
cls = LookupDefclassByMdlOrScope(theEnv,DOToString(tmp));
if (cls == NULL)
{
ClassExistError(theEnv,"class-abstractp",ValueToString(tmp.value));
return(FALSE);
}
return(EnvClassAbstractP(theEnv,(void *) cls));
}
globle intBool ClassAbstractP(
void *clsptr)
{
return EnvClassAbstractP(GetCurrentEnvironment(),clsptr);
}