Difference between revisions of "Classdef"

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m (→‎Lower-priority issues: Update bug #52614.)
 
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Octave should be able to parse the events section of a classdef definition but nothing is done with it.  Progress on this feature is tracked in bug report {{bug|56194}}.
 
Octave should be able to parse the events section of a classdef definition but nothing is done with it.  Progress on this feature is tracked in bug report {{bug|56194}}.
  
==== built-in class as superclass ====
+
=== Open Bug Reports for Other Issues ===
 
 
Octave does not allow subclassing built-in classes.  In Matlab, classdef objects may subclass built-in integer, floating point, and logical types.  For example,
 
 
<source lang="octave">
 
classdef nonsense < uint32
 
  ...
 
end
 
</source>
 
 
 
does not work.
 
 
 
Progress on this feature is tracked in bug report {{bug|44035}}.
 
 
 
==== concatenation of classdef objects ====
 
 
 
Octave does not support concatenation of classdef objects to create classdef array objects.
 
 
 
Example:
 
 
 
<source lang="octave">
 
classdef MyClass < handle
 
end
 
 
 
c = MyClass();
 
cc = [c, c];  % won't work
 
</source>
 
 
 
For now you can use a cell-array of objects instead:
 
<source lang="octave">
 
cc = {c, c};  % ok
 
</source>
 
 
 
Progress on this feature is tracked in bug reports {{bug|44665}} and {{bug|53906}}.
 
 
 
==== Saving and loading classdef objects ====
 
 
 
Saving and loading classdef objects is not supported.
 
 
 
Progress on this feature is tracked in bug report {{bug|45833}}
 
 
 
=== Open Bug Reports for Issues not Described Above ===
 
  
 
==== Issues with basic classdef functionality ====
 
==== Issues with basic classdef functionality ====
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* [https://savannah.gnu.org/bugs/?55746 55746] interpreter fails to instantiate classdef with classdef properties
 
* [https://savannah.gnu.org/bugs/?55746 55746] interpreter fails to instantiate classdef with classdef properties
 
* [https://savannah.gnu.org/bugs/?52582 52582] using static method to initialize property value fails
 
* [https://savannah.gnu.org/bugs/?52582 52582] using static method to initialize property value fails
 +
* [https://savannah.gnu.org/bugs/?45833 45833] support load/save of classdef objects
  
 
==== Classdef and +package directories ====
 
==== Classdef and +package directories ====
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==== Arrays of classdef objects ====
 
==== Arrays of classdef objects ====
  
 +
* [https://savannah.gnu.org/bugs/?44665 44665] error in concatenation of classdef objects
 +
* [https://savannah.gnu.org/bugs/?53906 53906] Cannot make an object array with square brackets
 
* [https://savannah.gnu.org/bugs/?47755 47755] Access to object arrays
 
* [https://savannah.gnu.org/bugs/?47755 47755] Access to object arrays
 
* [https://savannah.gnu.org/bugs/?47241 47241] classdef: assigning property of handle object in object array constructs new object
 
* [https://savannah.gnu.org/bugs/?47241 47241] classdef: assigning property of handle object in object array constructs new object
Line 185: Line 147:
 
* [https://savannah.gnu.org/bugs/?53811 53811] cellfun does not find overloaded function with function name argument
 
* [https://savannah.gnu.org/bugs/?53811 53811] cellfun does not find overloaded function with function name argument
 
* [https://savannah.gnu.org/bugs/?52989 52989] classdef: missing error messages on multiply defined properties
 
* [https://savannah.gnu.org/bugs/?52989 52989] classdef: missing error messages on multiply defined properties
* [https://savannah.gnu.org/bugs/?52614 52614] setting properties of classdef object during construction with inheritance
+
* <strike>[https://savannah.gnu.org/bugs/?52614 52614] setting properties of classdef object during construction with inheritance</strike>
 
* [https://savannah.gnu.org/bugs/?52582 52582] Dependent constant properties in classdef errors: no such file
 
* [https://savannah.gnu.org/bugs/?52582 52582] Dependent constant properties in classdef errors: no such file
 
* [https://savannah.gnu.org/bugs/?52123 52123] Indirect memory leak in cdef_manager::initialize ()
 
* [https://savannah.gnu.org/bugs/?52123 52123] Indirect memory leak in cdef_manager::initialize ()
Line 197: Line 159:
 
* [https://savannah.gnu.org/bugs/?55755 55755] mxGetProperty does not work with properties marked as Dependent
 
* [https://savannah.gnu.org/bugs/?55755 55755] mxGetProperty does not work with properties marked as Dependent
 
* [https://savannah.gnu.org/bugs/?55767 55767] classdef property should not be the same as classdef name (at least for Matlab compatibility)
 
* [https://savannah.gnu.org/bugs/?55767 55767] classdef property should not be the same as classdef name (at least for Matlab compatibility)
 +
* [https://savannah.gnu.org/bugs/?44035 44035] unable to subclass built-in types
  
 
==== Documentation ====
 
==== Documentation ====

Latest revision as of 14:15, 20 May 2019

Supported Features[edit]

Properties[edit]

Classdef properties are supported but not all attributes are implemented.

Attribute Support Notes
AbortSet No Property does not exist.
Abstract Yes
Access Partial
Constant Yes
Dependent Partial
GetAccess Partial
GetObservable No Property exists but is not used. Requires events and listeners to be implemented in order to work properly.
Hidden Yes
NonCopyable No Property does not exist.
SetAccess Partial
SetObservable No Property exists but is not used. Requires events and listeners to be implemented in order to work properly.
Transient No Property exists but is not used.

Methods[edit]

Classdef methods are supported but not all attributes are fully implemented.

Attribute Support Notes
Abstract Partial See bug report #51377
Access Yes
Hidden Yes
Sealed Yes
Static Yes

Features that are not implemented[edit]

enumeration[edit]

Octave should be able to parse the enumeration section of a classdef definition but nothing is done with it. Progress on this feature is tracked in bug report #44582.

events and listeners[edit]

Octave should be able to parse the events section of a classdef definition but nothing is done with it. Progress on this feature is tracked in bug report #56194.

Open Bug Reports for Other Issues[edit]

Issues with basic classdef functionality[edit]

  • 51659 Calling 'methods' on self causes syntax error
  • 48682 print_usage fails within classdef block
  • 49434 which returns "built-in function" for classdef m-file
  • 48041 classdef: `help myclass` messes up `help @myclass/method`
  • 43047 help() does not see classdef files
  • 42620 exist() does not use "class" argument
  • 53874 doc_cache_create doesnt handle classdef documentation
  • 52096 meta.class.fromName throws error when class name not found.
  • 48693 classdef subsref method is not called with correct nargout value
  • 56006 Object indexing: obj(1).property(end+1:n) - end is interpreted wrong
  • 55983 'x(ix) = []' deletion syntax does not work for objects
  • 55976 cat, repmat, and reshape don't work for classdef objects
  • 55961 properties function does not preserve order
  • 55768 display of classdef object should not show private or protected properties
  • 55766 properties function should not return Hidden properties
  • 55746 interpreter fails to instantiate classdef with classdef properties
  • 52582 using static method to initialize property value fails
  • 45833 support load/save of classdef objects

Classdef and +package directories[edit]

  • 54941 interpreter cannot find methods in files of classdefs in packages

Arrays of classdef objects[edit]

  • 44665 error in concatenation of classdef objects
  • 53906 Cannot make an object array with square brackets
  • 47755 Access to object arrays
  • 47241 classdef: assigning property of handle object in object array constructs new object

Debugger (fixes for these are in progress)[edit]

  • 46451 unable to set breakpoints within classdef classes
  • 45404 Breakpoints cannot be set in classdef methods or +package function files

Lower-priority issues[edit]

  • 55488 Invalid use of colon char as classdef function's argument when subsref is overwritten
  • 54966 Error when assigning array to an object implementing subsasgn() subscripted using "{}"
  • 54028 copy of non-handle class instance is not deep
  • 53811 cellfun does not find overloaded function with function name argument
  • 52989 classdef: missing error messages on multiply defined properties
  • 52614 setting properties of classdef object during construction with inheritance
  • 52582 Dependent constant properties in classdef errors: no such file
  • 52123 Indirect memory leak in cdef_manager::initialize ()
  • 51285 max_recursion_depth error in classdef constructor
  • 50395 subclassing a class that is also defined as a variable fails
  • 50011 failure to report error on conflicting methods for classdef
  • 49379 classdef constructor: .argn. loses first argument, inputname(n) returns inputname(n+1)
  • 55810 sizeof() and whos() returns 0 bytes for classdef objects
  • 45893 classdef properties are not reloaded when file is updated
  • 44643 classdef handle object can go into an recursive loop with isequal(obj1,obj2) if both are self-referential
  • 55755 mxGetProperty does not work with properties marked as Dependent
  • 55767 classdef property should not be the same as classdef name (at least for Matlab compatibility)
  • 44035 unable to subclass built-in types

Documentation[edit]

  • 50729 Improve OOP documentation
  • 47908 Octave:classdef-to-struct not documented in warning_ids.m
  • 44590 More documentation for the current status of classdef implementation

Classdef examples in the wild[edit]