#include <LELUnary.h>
Public Member Functions | |
| LELUnaryConst () | |
| Default constructor creates a scalar with a false mask. More... | |
| LELUnaryConst (const T val) | |
| Constructor takes a scalar. More... | |
| ~LELUnaryConst () | |
| Destructor does nothing. More... | |
| virtual void | eval (LELArray< T > &result, const Slicer §ion) const |
| Evaluate the expression. More... | |
| virtual LELScalar< T > | getScalar () const |
| Evaluate the scalar expression (get the constant) More... | |
| virtual Bool | prepareScalarExpr () |
| Do further preparations (e.g. More... | |
| virtual String | className () const |
| Get class name. More... | |
 Public Member Functions inherited from casacore::LELInterface< T > | |
| virtual | ~LELInterface () |
| Virtual destructor. More... | |
| virtual void | evalRef (LELArrayRef< T > &result, const Slicer §ion) const |
| LELArray< T > | getArray () const |
| Get the result of an array subexpression. More... | |
| Bool | isScalar () const |
| Is the result of evaluating this expression a scalar ? More... | |
| const IPosition & | shape () const |
| Get the shape of the expression result. More... | |
| const LELAttribute & | getAttribute () const |
| Get expression attribute. More... | |
| virtual Bool | lock (FileLocker::LockType, uInt nattempts) |
| Handle locking/syncing of the parts of a lattice expression. More... | |
| virtual void | unlock () |
| virtual Bool | hasLock (FileLocker::LockType) const |
| virtual void | resync () |
Private Attributes | |
| LELScalar< T > | val_p |
Additional Inherited Members | |
| Static Public Member Functions inherited from casacore::LELInterface< T > | |
| static Bool | replaceScalarExpr (CountedPtr< LELInterface< T > > &expr) |
| If the given expression is a valid scalar, replace it by its result. More... | |
| Protected Member Functions inherited from casacore::LELInterface< T > | |
| void | setAttr (const LELAttribute &attrib) |
| Set the expression attributes of this object. More... | |
Detailed Description
template<class T>
class casacore::LELUnaryConst< T >
This LEL class handles scalar (unary) constants
Intended use:
Internal
Review Status
- Date Reviewed:
- yyyy/mm/dd
Prerequisite
Etymology
This derived LEL letter class handles scalar (unary) constants
Synopsis
This LEL letter class is derived from LELInterface. It is used to construct LEL objects that represent scalars constants. They can be of type Float,Double,Complex,DComplex and Bool.
A description of the implementation details of the LEL classes can be found in Note 216
Example
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:
Motivation
Constants are a basic mathematical expression.
Definition at line 96 of file LELUnary.h.
Constructor & Destructor Documentation
◆ LELUnaryConst() [1/2]
| casacore::LELUnaryConst< T >::LELUnaryConst | ( | ) |
Default constructor creates a scalar with a false mask.
◆ LELUnaryConst() [2/2]
| casacore::LELUnaryConst< T >::LELUnaryConst | ( | const T | val | ) |
Constructor takes a scalar.
◆ ~LELUnaryConst()
| casacore::LELUnaryConst< T >::~LELUnaryConst | ( | ) |
Destructor does nothing.
Member Function Documentation
◆ className()
|
virtual |
Get class name.
Implements casacore::LELInterface< T >.
◆ eval()
|
virtual |
Evaluate the expression.
This throws an exception, since only a scalar can be returned.
Implements casacore::LELInterface< T >.
◆ getScalar()
|
virtual |
Evaluate the scalar expression (get the constant)
Implements casacore::LELInterface< T >.
◆ prepareScalarExpr()
|
virtual |
Do further preparations (e.g.
optimization) on the expression.
Implements casacore::LELInterface< T >.
Member Data Documentation
◆ val_p
|
private |
Definition at line 127 of file LELUnary.h.
The documentation for this class was generated from the following file:
- lattices/LEL/LELUnary.h
