This LEL class handles relational binary numerical operators. More...
#include <LELBinary.h>
Public Member Functions | |
LELBinaryCmp (const LELBinaryEnums::Operation op, const CountedPtr< LELInterface< T > > &pLeftExpr, const CountedPtr< LELInterface< T > > &pRightExpr) | |
Constructor takes operation and left and right expressions to be operated upon. | |
~LELBinaryCmp () | |
Destructor. | |
virtual void | eval (LELArray< Bool > &result, const Slicer §ion) const |
Recursively evaluate the expression. | |
virtual LELScalar< Bool > | getScalar () const |
Recursively evaluate the scalar expression. | |
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 | |
LELBinaryEnums::Operation | op_p |
CountedPtr< LELInterface< T > > | pLeftExpr_p |
CountedPtr< LELInterface< T > > | pRightExpr_p |
This LEL class handles relational binary numerical operators.
Internal
This derived LEL letter class handles relational numerical binary operators
This LEL letter class is derived from LELInterface. It is used to construct LEL objects that apply relational numerical binary operators to Lattice expressions. They operate on numerical (Float,Double,Complex,DComplex) Lattice expressions and result in a Bool. The available C++ operators are ==,!=>,>=,<,<=,
with equivalents in the enum of EQ, NE, GT, GE, LT, and LE
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. Examples of how the user would indirectly use this class (through the envelope) are:
IPosition shape(2,5,10); ArrayLattice<Float> x(shape); x.set(1.0); ArrayLattice<Float> y(shape); y.set(2.0); ArrayLattice<Bool> z(shape); z.copyData(x==y); // z = x == y; z.copyData(x!=y); // z = x != y; z.copyData(x>y); // z = x > y; z.copyData(x>=y); // z = x >= y; z.copyData(x<y); // z = x < y; z.copyData(x<=y); // z = x <= y;
Numerical relational binary operations are a basic mathematical expression.
Definition at line 210 of file LELBinary.h.
casacore::LELBinaryCmp< T >::LELBinaryCmp | ( | const LELBinaryEnums::Operation | op, | |
const CountedPtr< LELInterface< T > > & | pLeftExpr, | |||
const CountedPtr< LELInterface< T > > & | pRightExpr | |||
) |
Constructor takes operation and left and right expressions to be operated upon.
It can only handle the comparison operators.
casacore::LELBinaryCmp< T >::~LELBinaryCmp | ( | ) |
Destructor.
virtual String casacore::LELBinaryCmp< T >::className | ( | ) | const [virtual] |
Get class name.
Implements casacore::LELInterface< Bool >.
virtual void casacore::LELBinaryCmp< T >::eval | ( | LELArray< Bool > & | result, | |
const Slicer & | section | |||
) | const [virtual] |
Recursively evaluate the expression.
Implements casacore::LELInterface< Bool >.
virtual LELScalar<Bool> casacore::LELBinaryCmp< T >::getScalar | ( | ) | const [virtual] |
Recursively evaluate the scalar expression.
Implements casacore::LELInterface< Bool >.
virtual Bool casacore::LELBinaryCmp< T >::hasLock | ( | FileLocker::LockType | ) | const [virtual] |
Reimplemented from casacore::LELInterface< Bool >.
virtual Bool casacore::LELBinaryCmp< T >::lock | ( | FileLocker::LockType | , | |
uInt | nattempts | |||
) | [virtual] |
Handle locking/syncing of a lattice in a lattice expression.
Reimplemented from casacore::LELInterface< Bool >.
virtual Bool casacore::LELBinaryCmp< T >::prepareScalarExpr | ( | ) | [virtual] |
Do further preparations (e.g.
optimization) on the expression.
Implements casacore::LELInterface< Bool >.
virtual void casacore::LELBinaryCmp< T >::resync | ( | ) | [virtual] |
Reimplemented from casacore::LELInterface< Bool >.
virtual void casacore::LELBinaryCmp< T >::unlock | ( | ) | [virtual] |
Reimplemented from casacore::LELInterface< Bool >.
LELBinaryEnums::Operation casacore::LELBinaryCmp< T >::op_p [private] |
Definition at line 245 of file LELBinary.h.
CountedPtr<LELInterface<T> > casacore::LELBinaryCmp< T >::pLeftExpr_p [private] |
Definition at line 246 of file LELBinary.h.
CountedPtr<LELInterface<T> > casacore::LELBinaryCmp< T >::pRightExpr_p [private] |
Definition at line 247 of file LELBinary.h.