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This class allows extending ExpEvaluator to implement custom fields and functions
~ExpExtender ()
| ~ExpExtender |
[virtual]
Destructor
RefObject* refObj ()
| refObj |
[virtual]
Retrieve the reference counted object owning this interface
Returns: Pointer to object owning the extender, NULL if no ownership
bool hasField (ObjList& stack, const String& name, GenObject* context)
| hasField |
[const virtual]
Check if a certain field is assigned in extender
Parameters:
stack | Evaluation stack in use |
name | Name of the field to test |
context | Pointer to arbitrary object passed from evaluation methods |
Returns: True if the field is present
NamedString* getField (ObjList& stack, const String& name, GenObject* context)
| getField |
[const virtual]
Get a pointer to a field in extender
Parameters:
stack | Evaluation stack in use |
name | Name of the field to retrieve |
context | Pointer to arbitrary object passed from evaluation methods |
Returns: Pointer to field, NULL if not present
bool runFunction (ObjList& stack, const ExpOperation& oper, GenObject* context)
| runFunction |
[virtual]
Try to evaluate a single function
Parameters:
stack | Evaluation stack in use, parameters are popped off this stack and results are pushed back on stack |
oper | Function to evaluate |
context | Pointer to arbitrary object passed from evaluation methods |
Returns: True if evaluation succeeded
bool runField (ObjList& stack, const ExpOperation& oper, GenObject* context)
| runField |
[virtual]
Try to evaluate a single field
Parameters:
stack | Evaluation stack in use, field value must be pushed on it |
oper | Field to evaluate |
context | Pointer to arbitrary object passed from evaluation methods |
Returns: True if evaluation succeeded
bool runAssign (ObjList& stack, const ExpOperation& oper, GenObject* context)
| runAssign |
[virtual]
Try to assign a value to a single field
Parameters:
stack | Evaluation stack in use |
oper | Field to assign to, contains the field name and new value |
context | Pointer to arbitrary object passed from evaluation methods |
Returns: True if assignment succeeded
Generated by: paulc on bussard on Thu Jul 24 18:41:02 2014, using kdoc 2.0a54. |