QoreStringValueHelper Class Reference

this class is used to safely manage calls to AbstractQoreNode::getStringRepresentation() when a simple QoreString value is needed, stack only, may not be dynamically allocated More...

#include <QoreStringNode.h>

Public Member Functions
DLLLOCAL	QoreStringValueHelper (const AbstractQoreNode *n)
	creates the object and acquires a pointer to the QoreString representation of the AbstractQoreNode passed
DLLLOCAL	QoreStringValueHelper (const AbstractQoreNode *n, const QoreEncoding *enc, ExceptionSink *xsink)
	gets the QoreString representation and ensures that it's in the desired encoding More...
DLLLOCAL	~QoreStringValueHelper ()
	destroys the object and deletes the QoreString pointer being managed if it was a temporary pointer
DLLLOCAL QoreString *	giveString ()
	returns a copy of the QoreString that the caller owns More...
DLLLOCAL bool	is_temp () const
	returns true if the pointer being managed is temporary
DLLLOCAL const QoreString *	operator* ()
	returns the object being managed More...
DLLLOCAL const QoreString *	operator-> ()
	returns the object being managed More...

Detailed Description

this class is used to safely manage calls to AbstractQoreNode::getStringRepresentation() when a simple QoreString value is needed, stack only, may not be dynamically allocated

the QoreString value returned by this function is managed safely in an exception-safe way with this class

QoreStringValueHelper str(n);
printf("str='%s'\n", str->getBuffer());

Constructor & Destructor Documentation

DLLLOCAL QoreStringValueHelper::QoreStringValueHelper ( const AbstractQoreNode *  n, const QoreEncoding *  enc, ExceptionSink *  xsink  )

inline

gets the QoreString representation and ensures that it's in the desired encoding

a Qore-language exception may be thrown if an encoding error occurs

// get a QoreString value from "node" and ensure it's in UTF-8 encoding
QoreStringValueHelper t(node, QCS_UTF8, xsink);
// return if there was an exception converting the encoding to UTF-8
if (*xsink)
return 0;

// use the string value
return new MStringData(t->getBuffer(), MEncoding::M_ASCII);

References QoreString::convertEncoding(), QoreString::getEncoding(), AbstractQoreNode::getStringRepresentation(), AbstractQoreNode::getType(), and NT_STRING.

Member Function Documentation

DLLLOCAL QoreString* QoreStringValueHelper::giveString ( )

inline

returns a copy of the QoreString that the caller owns

the object may be left empty after this call

Returns

a QoreString pointer owned by the caller

References QoreString::copy().

DLLLOCAL const QoreString* QoreStringValueHelper::operator* ( )

inline

returns the object being managed

Returns

the object being managed

DLLLOCAL const QoreString* QoreStringValueHelper::operator-> ( )

inline

returns the object being managed

Returns

the object being managed

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

• include/qore/QoreStringNode.h (6813)