Class to convert a LEL node from one numerical type to another. More...
#include <LELConvert.h>
Public Member Functions | |
LELConvert (const CountedPtr< LELInterface< F > > &expr) | |
Constructor. | |
~LELConvert () | |
Destructor does nothing. | |
virtual void | eval (LELArray< T > &result, const Slicer §ion) const |
Recursively evaluate the expression. | |
virtual LELScalar< T > | getScalar () const |
Recursively evaluate the scalar. | |
virtual Bool | prepareScalarExpr () |
Do further preparations (e.g. | |
virtual String | className () const |
Get class name. | |
virtual Bool | lock (FileLocker::LockType, uInt nattempts) |
Handle locking/syncing of a lattice in a lattice expression. | |
virtual void | unlock () |
virtual Bool | hasLock (FileLocker::LockType) const |
virtual void | resync () |
Private Attributes | |
CountedPtr< LELInterface< F > > | pExpr_p |
Class to convert a LEL node from one numerical type to another.
Internal
This derived LEL letter class handles numerical type conversions
This LEL letter class is derived from LELInterface. It is used to construct LEL objects that know how to convert between numerical types, such as Double to Float. They operate on numerical Lattices and return a numerical Lattice. The LELConvert object is embedded in the tree, and the conversion actually happens at tree evaluation time.
A description of the implementation details of the LEL classes can be found in Note 216
Examples are not very useful as the user would never use these classes directly. Look in LatticeExprNode.cc to see how it invokes these classes. An example of how the user would indirectly use this class (through the envelope) is:
IPosition shape(2,5,10); ArrayLattice<Float> x(shape); x.set(1.0); ArrayLattice<Double> y(shape); y.copyData(x); // y = x;
The LELConvert class is embedded in the tree at construction time so as to handle the conversion from Float to Double at evaluation time
We needed to be able to handle mixed types in the LEL classes
Definition at line 95 of file LELConvert.h.
casacore::LELConvert< T, F >::LELConvert | ( | const CountedPtr< LELInterface< F > > & | expr | ) |
Constructor.
<F>
is the type we are coinverting from. <T>
is the type we are converting to.
casacore::LELConvert< T, F >::~LELConvert | ( | ) |
Destructor does nothing.
virtual String casacore::LELConvert< T, F >::className | ( | ) | const [virtual] |
Get class name.
Implements casacore::LELInterface< T >.
virtual void casacore::LELConvert< T, F >::eval | ( | LELArray< T > & | result, | |
const Slicer & | section | |||
) | const [virtual] |
Recursively evaluate the expression.
Implements casacore::LELInterface< T >.
virtual LELScalar<T> casacore::LELConvert< T, F >::getScalar | ( | ) | const [virtual] |
Recursively evaluate the scalar.
Implements casacore::LELInterface< T >.
virtual Bool casacore::LELConvert< T, F >::hasLock | ( | FileLocker::LockType | ) | const [virtual] |
Reimplemented from casacore::LELInterface< T >.
virtual Bool casacore::LELConvert< T, F >::lock | ( | FileLocker::LockType | , | |
uInt | nattempts | |||
) | [virtual] |
Handle locking/syncing of a lattice in a lattice expression.
Reimplemented from casacore::LELInterface< T >.
virtual Bool casacore::LELConvert< T, F >::prepareScalarExpr | ( | ) | [virtual] |
Do further preparations (e.g.
optimization) on the expression.
Implements casacore::LELInterface< T >.
virtual void casacore::LELConvert< T, F >::resync | ( | ) | [virtual] |
Reimplemented from casacore::LELInterface< T >.
virtual void casacore::LELConvert< T, F >::unlock | ( | ) | [virtual] |
Reimplemented from casacore::LELInterface< T >.
CountedPtr<LELInterface<F> > casacore::LELConvert< T, F >::pExpr_p [private] |
Definition at line 128 of file LELConvert.h.