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Teuchos - Trilinos Tools Package
Version of the Day
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Simple wrapper class for raw pointers to single objects where no persisting relationship exists. More...
#include <Teuchos_PtrDecl.hpp>
Public Member Functions | |
| Ptr (ENull null_in=null) | |
| Default construct to NULL. More... | |
| Ptr (T *ptr) | |
| Construct given a raw pointer. More... | |
| Ptr (const Ptr< T > &ptr) | |
| Copy construct from same type. More... | |
| template<class T2 > | |
| Ptr (const Ptr< T2 > &ptr) | |
| Copy construct from another type. More... | |
| Ptr< T > & | operator= (const Ptr< T > &ptr) |
| Shallow copy of the underlying pointer. More... | |
| T * | operator-> () const |
Pointer (->) access to members of underlying object. More... | |
| T & | operator* () const |
| Dereference the underlying object. More... | |
| T * | get () const |
| Get the raw C++ pointer to the underlying object. More... | |
| T * | getRawPtr () const |
| Get the raw C++ pointer to the underlying object. More... | |
| bool | is_null () const |
| Return true if the wrapped raw pointer is NULL, else return false. More... | |
| const Ptr< T > & | assert_not_null () const |
Throws std::logic_error if this->get()==NULL, otherwise returns reference to *this. More... | |
| const Ptr< T > | ptr () const |
| Return a copy of *this. More... | |
| Ptr< const T > | getConst () const |
| Return a Ptr<const T> version of *this. More... | |
Related Functions | |
(Note that these are not member functions.) | |
| template<typename T > | |
| Ptr< T > | outArg (T &arg) |
| create a non-persisting (required or optional) output argument for a function call. More... | |
| template<typename T > | |
| Ptr< T > | inOutArg (T &arg) |
| create a non-persisting (required or optional) input/output argument for a function call. More... | |
| template<typename T > | |
| Ptr< T > | inoutArg (T &arg) |
| create a non-persisting (required or optional) input/output argument for a function call. More... | |
| template<typename T > | |
| Ptr< const T > | ptrInArg (T &arg) |
create a general Ptr input argument for a function call from a reference. More... | |
| template<typename T > | |
| Ptr< T > | optInArg (T &arg) |
| create a non-persisting non-const optional input argument for a function call. More... | |
| template<typename T > | |
| Ptr< const T > | constOptInArg (T &arg) |
| create a non-persisting const optional input argument for a function call. More... | |
| template<typename T > | |
| Ptr< T > | ptrFromRef (T &arg) |
| Create a pointer to a object from an object reference. More... | |
| template<typename T > | |
| Ptr< T > | ptr (T *p) |
| Create a pointer to an object from a raw pointer. More... | |
| template<typename T > | |
| Ptr< const T > | constPtr (T &arg) |
| Create a pointer from a const object given a non-const object reference. More... | |
| template<class T > | |
| bool | is_null (const Ptr< T > &p) |
Returns true if p.get()==NULL. More... | |
| template<class T > | |
| bool | nonnull (const Ptr< T > &p) |
Returns true if p.get()!=NULL More... | |
| template<class T > | |
| bool | operator== (const Ptr< T > &p, ENull) |
Returns true if p.get()==NULL. More... | |
| template<class T > | |
| bool | operator!= (const Ptr< T > &p, ENull) |
Returns true if p.get()!=NULL. More... | |
| template<class T1 , class T2 > | |
| bool | operator== (const Ptr< T1 > &p1, const Ptr< T2 > &p2) |
Return true if two Ptr objects point to the same object. More... | |
| template<class T1 , class T2 > | |
| bool | operator!= (const Ptr< T1 > &p1, const Ptr< T2 > &p2) |
Return true if two Ptr objects do not point to the same object. More... | |
| template<class T2 , class T1 > | |
| Ptr< T2 > | ptr_implicit_cast (const Ptr< T1 > &p1) |
Implicit cast of underlying Ptr type from T1* to T2*. More... | |
| template<class T2 , class T1 > | |
| Ptr< T2 > | ptr_static_cast (const Ptr< T1 > &p1) |
Static cast of underlying Ptr type from T1* to T2*. More... | |
| template<class T2 , class T1 > | |
| Ptr< T2 > | ptr_const_cast (const Ptr< T1 > &p1) |
Constant cast of underlying Ptr type from T1* to T2*. More... | |
| template<class T2 , class T1 > | |
| Ptr< T2 > | ptr_dynamic_cast (const Ptr< T1 > &p1, bool throw_on_fail=false) |
Dynamic cast of underlying Ptr type from T1* to T2*. More... | |
| template<class T > | |
| std::ostream & | operator<< (std::ostream &out, const Ptr< T > &p) |
| Output stream inserter. More... | |
Simple wrapper class for raw pointers to single objects where no persisting relationship exists.
This class is meant to replace all but the lowest-level use of raw pointers that point to single objects where the use of RCP is not justified for performance or semantic reasons. When built in optimized mode, this class should impart little time overhead and should be exactly equivalent in the memory footprint to a raw C++ pointer and the only extra runtime overhead will be the default initalization to NULL.
The main advantages of using this class over a raw pointer however are:
Ptr objects always default construct to null
Ptr objects will throw exceptions on attempts to dereference the underlying null pointer when debugging support is compiled in.
Ptr does not allow array-like operations like ptr[i], ++ptr or ptr+i that can only result in disaster when the a pointer points to only a single object that can not be assumed to be part of an array of objects.
Ptr is part of a system of types defined in Teuchos that keeps your code away from raw pointers which are the cause of most defects in C++ code.
Debugging support is compiled in when the macro TEUCHOS_DEBUG is defined which happens automatically when –enable-teuchos-debug is specified on the configure line. When debugging support is not compiled in, the only overhead imparted by this class is it's default initialization to null. Therefore, this class can provide for very high performance on optimized builds of the code.
An implicit conversion from a raw pointer to a Ptr object is okay since we don't assume any ownership of the object, hense the constructor taking a raw pointer is not declared explicit. However, this class does not support an implicit conversion to a raw pointer since we want to limit the exposure of raw pointers in our software. If we have to convert back to a raw pointer, then we want to make that explicit by calling get().
This class should be used to replace most raw uses of C++ pointers to single objects where using the RCP class is not appropriate, unless the runtime cost of null-initialization it too expensive.
Definition at line 104 of file Teuchos_PtrDecl.hpp.
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inline |
Default construct to NULL.
Postconditons:
this->get() == NULL Definition at line 60 of file Teuchos_Ptr.hpp.
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inlineexplicit |
Construct given a raw pointer.
Postconditons:
this->get() == ptr Note: This constructor is declared explicit so there is no implicit conversion from a raw C++ pointer to a Ptr object. This is meant to avoid cases where an uninitialized pointer is used to implicitly initialize one of these objects.
Definition at line 66 of file Teuchos_Ptr.hpp.
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inline |
Copy construct from same type.
Postconditons:
this->get() == ptr.get() Definition at line 72 of file Teuchos_Ptr.hpp.
Copy construct from another type.
Postconditons:
this->get() == ptr.get() (unless virtual base classes are involved) Definition at line 82 of file Teuchos_Ptr.hpp.
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inline |
Shallow copy of the underlying pointer.
Postconditons:
this->get() == ptr.get() Definition at line 91 of file Teuchos_Ptr.hpp.
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inline |
Pointer (->) access to members of underlying object.
Preconditions:
this->get() != NULL (throws std::logic_error) Definition at line 102 of file Teuchos_Ptr.hpp.
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inline |
Dereference the underlying object.
Preconditions:
this->get() != NULL (throws std::logic_error) Definition at line 111 of file Teuchos_Ptr.hpp.
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inline |
Get the raw C++ pointer to the underlying object.
Definition at line 120 of file Teuchos_Ptr.hpp.
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inline |
Get the raw C++ pointer to the underlying object.
Definition at line 128 of file Teuchos_Ptr.hpp.
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inline |
Return true if the wrapped raw pointer is NULL, else return false.
Definition at line 144 of file Teuchos_Ptr.hpp.
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inline |
Throws std::logic_error if this->get()==NULL, otherwise returns reference to *this.
Definition at line 135 of file Teuchos_Ptr.hpp.
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inline |
Return a copy of *this.
Definition at line 150 of file Teuchos_Ptr.hpp.
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inline |
Return a Ptr<const T> version of *this.
Definition at line 157 of file Teuchos_Ptr.hpp.
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related |
create a non-persisting (required or optional) output argument for a function call.
Definition at line 227 of file Teuchos_PtrDecl.hpp.
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related |
create a non-persisting (required or optional) input/output argument for a function call.
Definition at line 239 of file Teuchos_PtrDecl.hpp.
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related |
create a non-persisting (required or optional) input/output argument for a function call.
Definition at line 251 of file Teuchos_PtrDecl.hpp.
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related |
create a general Ptr input argument for a function call from a reference.
Definition at line 263 of file Teuchos_PtrDecl.hpp.
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related |
create a non-persisting non-const optional input argument for a function call.
Definition at line 275 of file Teuchos_PtrDecl.hpp.
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related |
create a non-persisting const optional input argument for a function call.
Definition at line 287 of file Teuchos_PtrDecl.hpp.
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related |
Create a pointer to a object from an object reference.
Definition at line 298 of file Teuchos_PtrDecl.hpp.
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related |
Create a pointer to an object from a raw pointer.
Definition at line 329 of file Teuchos_PtrDecl.hpp.
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related |
Create a pointer from a const object given a non-const object reference.
Warning! Do not call this function if T is already const or a compilation error will occur!
Definition at line 344 of file Teuchos_PtrDecl.hpp.
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related |
Returns true if p.get()==NULL.
Definition at line 355 of file Teuchos_PtrDecl.hpp.
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related |
Returns true if p.get()!=NULL
Definition at line 366 of file Teuchos_PtrDecl.hpp.
Returns true if p.get()==NULL.
Definition at line 377 of file Teuchos_PtrDecl.hpp.
Returns true if p.get()!=NULL.
Definition at line 388 of file Teuchos_PtrDecl.hpp.
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related |
Return true if two Ptr objects point to the same object.
Definition at line 399 of file Teuchos_PtrDecl.hpp.
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related |
Return true if two Ptr objects do not point to the same object.
Definition at line 411 of file Teuchos_PtrDecl.hpp.
Implicit cast of underlying Ptr type from T1* to T2*.
The function will compile only if (T2* p2 = p1.get();) compiles.
This is to be used for conversions up an inheritance hierarchy and from non-const to const and any other standard implicit pointer conversions allowed by C++.
Definition at line 429 of file Teuchos_PtrDecl.hpp.
Static cast of underlying Ptr type from T1* to T2*.
The function will compile only if (static_cast<T2*>(p1.get());) compiles.
This can safely be used for conversion down an inheritance hierarchy with polymorphic types only if dynamic_cast<T2>(p1.get()) == static_cast<T2>(p1.get()). If not then you have to use ptr_dynamic_cast<T2>(p1).
Definition at line 449 of file Teuchos_PtrDecl.hpp.
Constant cast of underlying Ptr type from T1* to T2*.
This function will compile only if (const_cast<T2*>(p1.get());) compiles.
Definition at line 464 of file Teuchos_PtrDecl.hpp.
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related |
Dynamic cast of underlying Ptr type from T1* to T2*.
| p1 | [in] The smart pointer casting from |
| throw_on_fail | [in] If true then if the cast fails (for p1.get()!=NULL) then a |
Postconditions:
If ( p1.get()!=NULL && throw_on_fail==true && dynamic_cast<T2*>(p1.get())==NULL ) == true then an std::bad_cast std::exception is thrown with a very informative error message. If ( p1.get()!=NULL && dynamic_cast<T2*>(p1.get())!=NULL ) == true then return.get() == dynamic_cast<T2*>(p1.get()). If ( p1.get()!=NULL && throw_on_fail==false && dynamic_cast<T2*>(p1.get())==NULL ) == true then return.get() == NULL. If ( p1.get()==NULL ) == true then return.get() == NULL. This function will compile only if (dynamic_cast<T2*>(p1.get());) compiles.
Definition at line 496 of file Teuchos_PtrDecl.hpp.
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related |
Output stream inserter.
The implementation of this function just print pointer addresses and therefore puts no restrictions on the data types involved.
1.8.5