A Monotonic Superclass Linearization for Dylan. Kim Barrett . Bob Cassels [email protected]>. Paul Haahr. In computing, the C3 superclass linearization is an algorithm used primarily to obtain the order It was first published at the OOPSLA conference, in a paper entitled “A Monotonic Superclass Linearization for Dylan”. It was adapted to the. The C3 superclass linearization algorithm is more intuitive and allows for greater monotonicity of method orderings, a consistent superclass linearization.

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The Dylan linearization is monotonic, easily described, strictly observes local precedence order, and produces the same ordering as CLOS when limearization is monotonic. A monotonic superclass linearization for Dylan.

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A Monotonic Superclass Linearization for Dylan – Semantic Scholar

Moon, Keith Playford, and P. The C3 superclass linearization of llinearization class is the sum of the class plus a unique merge of the linearizations of its parents and a list of the parents itself.

Views Read Edit View history. Cited Source Add To Collection. After the C3 linearization was proposed gorit was subsequently adapted in Python 2. The C3 linearization has been around for a long time, does not break any existing code, and is commonly agreed upon as being the right thing to do in mailing list discussions.


Object-oriented programming with flavors. Retrieved August 14, The pull request was finally merged into master. Experiments show that there are some differences in existing code; we found so far three, two of them in duim-gadgets, one in winduim.

Baker 3 Estimated H-index: Look-based selection for rendering a computer-generated animation. Abstract Object-oriented languages with multiple inheritance and automatic conflict resolution typically use a linearization of superclasses to determine which version of a property to inherit when several superclasses provide definitions.

This article may be confusing or unclear to readers. Unfortunately the algorithm presented in the Dylan Reference Manual computing the class precedence list is not consistent with the extended precedence graph, and may lead to counter-intuitive linearizations.

The History of Python. Advanced Search Include Citations. Combined with Dylan’s sealing mechanism, a monotonic linearization enables some compile-time method selection that would otherwise be impossible in the absence of a closed-world assumption.

C3 linearization

Object-oriented languages with multiple inheritance and automatic conflict resolution typically use a linearization of superclasses to determine which version of a property to inherit when several superclasses monootonic definitions. Tucker Withington in a paper html version. It is also available as an alternative, non-default MRO in the core of Perl 5 starting with version 5.

Peter Mcnerney 2 Estimated H-index: In the first release a serious warning will be issued for superclass linearization which changed, in subsequent releases a warning should be issued depending on a strict compatibility to DRM switch.


Roland Ducournau 9 Estimated H-index: Procedural partitioning of a scene. A superclass linearization also known as a class precedence list is used for resolving conflicts among multiply-inherited superclasses which provide differing definitions of the same method. Bertrand Meyer 38 Estimated H-index: If at some point no good head can be selected, because the heads of all remaining lists appear in any one tail of the lists, then the merge is impossible to compute due to inconsistent orderings of dependencies in the inheritance hierarchy and no linearization of the original class exists.

Recent work has defined several desirable characteristics for linearizations, the most important being monotonicity, which prohibits inherited properties from skipping over direct superclasses.

A Monotonic Superclass Linearization for Dylan

Retrieved 18 January dyla Mark Stefik 32 Estimated H-index: The Dylan superclass linearization is sometimes counter-intuitive. This page was last edited on 28 Aprilat Roland Ducournau 4 Estimated H-index: The name “C3” is not an initialism.

The latter does not alter behaviour post. Moon 4 Estimated H-index: