# TCLAP::Constraint< T > Class Template Reference

The interface that defines the interaction between the Arg and Constraint. More...

`#include <Constraint.h>`

Inheritance diagram for TCLAP::Constraint< T >:

List of all members.

## Public Member Functions
virtual std::string | description () const =0
| Returns a description of the Constraint.
virtual std::string | shortID () const =0
| Returns the short ID for the Constraint.
virtual bool | check (const T &value) const =0
| The method used to verify that the value parsed from the command line meets the constraint.
virtual | ~Constraint ()
| Destructor.

## Detailed Description

### template<class T>
class TCLAP::Constraint< T >

The interface that defines the interaction between the Arg and Constraint.

Definition at line 38 of file Constraint.h.

## Constructor & Destructor Documentation

template<class T>

virtual TCLAP::Constraint< T >::~Constraint | ( |  | ) | `[inline, virtual]`

Destructor.

Silences warnings about Constraint being a base class with virtual functions but without a virtual destructor.

Definition at line 64 of file Constraint.h.

## Member Function Documentation

template<class T>

virtual bool TCLAP::Constraint< T >::check | ( | const T & | value | ) | const`[pure virtual]`

The method used to verify that the value parsed from the command line meets the constraint.

Parameters:

  | value | - The value that will be checked.

Implemented in TCLAP::ValuesConstraint< T >.

template<class T>

virtual std::string TCLAP::Constraint< T >::description | ( |  | ) | const`[pure virtual]`

Returns a description of the Constraint.

Implemented in TCLAP::ValuesConstraint< T >.

template<class T>

virtual std::string TCLAP::Constraint< T >::shortID | ( |  | ) | const`[pure virtual]`

Returns the short ID for the Constraint.

Implemented in TCLAP::ValuesConstraint< T >.

The documentation for this class was generated from the following file:

- Constraint.h