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QoreNullNode.h File Reference

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`#include <qore/AbstractQoreNode.h>`
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## Classes

class | QoreNullNode
| Qore's SQL "NULL" parse tree/value type, not-referenced counted, not dynamically allocated. More...

## Functions

static bool | is_null (const AbstractQoreNode *n)
| use this function to test for NULL
static QoreNullNode * | null ()
| returns a pointer to Null

## Variables

DLLEXPORT QoreNullNode | Null
| the global and unique NULL value in Qore

## Detailed Description

defines the QoreNullNode class