cDynamicExpression Class Reference
[Simulation core classes]
A stack-based expression evaluator class, for dynamically created expressions. More...
#include <cdynamicexpression.h>
Classes | |
| class | Elem |
| One element in a (reverse Polish) expression. More... | |
| class | Functor |
| Function object base class. More... | |
Public Types | |
| enum | OpType |
Public Member Functions | |
Constructors, destructor, assignment. | |
| cDynamicExpression () | |
| cDynamicExpression (const cDynamicExpression &other) | |
| virtual | ~cDynamicExpression () |
| cDynamicExpression & | operator= (const cDynamicExpression &other) |
Redefined cObject functions | |
| virtual cDynamicExpression * | dup () const |
| virtual std::string | info () const |
Setter and evaluator methods. | |
| virtual void | setExpression (Elem e[], int size) |
| virtual cNEDValue | evaluate (cComponent *context) const |
| virtual bool | boolValue (cComponent *context) |
| virtual long | longValue (cComponent *context, const char *expectedUnit=NULL) |
| virtual double | doubleValue (cComponent *context, const char *expectedUnit=NULL) |
| virtual std::string | stringValue (cComponent *context) |
| virtual cXMLElement * | xmlValue (cComponent *context) |
Miscellaneous utility functions. | |
|
| |
| virtual std::string | str () const |
| virtual void | parse (const char *text) |
| virtual int | compare (const cExpression *other) const |
| virtual bool | isAConstant () const |
| virtual bool | containsConstSubexpressions () const |
| virtual void | evaluateConstSubexpressions (cComponent *context) |
| static double | convertUnit (double d, const char *unit, const char *targetUnit) |
Detailed Description
A stack-based expression evaluator class, for dynamically created expressions.
NOTE: Experimental class -- API is subject to change.
Member Function Documentation
| static double cDynamicExpression::convertUnit | ( | double | d, | |
| const char * | unit, | |||
| const char * | targetUnit | |||
| ) | [static] |
Convert the given number into the target unit (e.g.
milliwatt to watt). Throws an exception if conversion is not possible (unknown/unrelated units).
Referenced by cNEDValue::doubleValueInUnit().
| virtual cNEDValue cDynamicExpression::evaluate | ( | cComponent * | context | ) | const [virtual] |
Evaluate the expression, and return the results as a cNEDValue.
Throws an error if the expression has some problem (i.e. stack overflow/underflow, "cannot cast", "function not found", etc.)
Reimplemented from cExpression.
| virtual void cDynamicExpression::evaluateConstSubexpressions | ( | cComponent * | context | ) | [virtual] |
Evaluates const subexpressions, and replaces them with their values.
See cDynamicExpression::Elem::CONSTSUBEXPR.
Implements cExpression.
| virtual std::string cDynamicExpression::info | ( | ) | const [virtual] |
Produces a one-line description of the object's contents.
See cObject for more details.
Reimplemented from cExpression.
| virtual void cDynamicExpression::setExpression | ( | Elem | e[], | |
| int | size | |||
| ) | [virtual] |
Sets the Reverse Polish expression to evaluate.
The array must be a dynamically allocated one, and will be deleted by this object. No verification is performed on the expression at this time.
The documentation for this class was generated from the following file:
