ov-null-mat.cc File Reference

#include "ov-null-mat.h"
#include "ops.h"
#include "defun.h"

Include dependency graph for ov-null-mat.cc:

Functions
	DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_null_matrix,"null_matrix","double")
	DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_null_str,"null_string","char")
	DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_null_sq_str,"null_sq_string","char")
	DEFUN (isnull, args,,"-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} isnull (@var{x})\n\ Return 1 if @var{x} is a special null matrix, string or single quoted string.\n\ Indexed assignment with such a value as right-hand side should delete array elements.\n\ This function should be used when overloading indexed assignment for user-defined \n\ classes instead of @code{isempty}, to distinguish the cases:\n\ @table @asis\n\ @item @code{A(I) = []}\n\ This should delete elements if @code{I} is nonempty.\n\ @item @code{X = []; A(I) = X}\n\ This should give an error if @code{I} is nonempty.\n\ @end table\n\ @end deftypefn")

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Function Documentation

DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA	(	octave_null_sq_str	,
		"null_sq_string"	,
		"char"
	)

DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA	(	octave_null_str	,
		"null_string"	,
		"char"
	)

DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA	(	octave_null_matrix	,
		"null_matrix"	,
		"double"
	)

DEFUN	(	isnull	,
		args
	)