Listing 2. StrNode Copy Constructor

StrNode::StrNode ( const StrNode & srcnode )
/*
Function:	StrNode copy constructor
Pre:	srcnode is a valid node instance
Post:	*this is a discrete copy of srcnode
	srcnode is unchanged
*/
{
strptr_ = new ( char [ strlen 
		( srcnode.strptr_ ) + 1 ] );
assert ( strptr_ );
strcpy ( strptr_, srcnode.strptr_ );
if ( srcnode.next_ )
	{
	next_ = new StrNode ( *srcnode.next_ );
				// indirect recursion
	assert ( next_ );	// out of memory?
	}
else
	{
	next_ = 0;
	}
}