• enhancements

This is a list of some of the stuff that we'd may like to see in Cython, and hopefully will be some of the coding sprints at http://wiki.sagemath.org/dev1 or perhaps even as Google Summer of Code projects.

CEPs are isolated ideas and concepts. They do not need to be full specifications; once it is believed that a concept is understood in enough detail that it won't be refactored into other pieces it is a good candidate for a CEP. However as CEPs are implemented they should develop towards a higher level of specificity (and eventually serve as documentation of the feature).

CEP 1xx - User experience

Improvement for specific usecases or libraries. These are bigger end-goals driving the development priorities and depends on other CEPs for the details.

• CEP 101 - Full Python 2.x syntax support (this is a 1.0 goal)

• CEP 102 - Full Python 3000 support

• CEP 103 - Improved C++ support

• CEP 104 - Better NumPy support

• CEP 105 - Syntax highlighting for common editors

• CEP 106 - Package pxds for common libraries with Cython

• CEP 107 - a special compilation mode that adds safety checks at various places

CEP 2xx - Frontend

Build system, command-line interface, library interface

• CEP 201 - build system

• CEP 202 - Plugin framework

CEP 3xx - Pure Python support

Supporting more features for pure Python code (without Cython syntax extensions)

• CEP 301 - from blah import * (Done)

• CEP 302 - with statements (Done)

• CEP 303 - closures

• CEP 304 - decorators (Done)

• CEP 305 - semantically correct scope

• CEP 306 - better local variable handling

CEP 4xx - Support for wrapping C/C++ libraries

Improved support for features in C/C++ code that is wrapped, often through extensions in the Cython declaration language.

CEP 5xx - Cython language features

Development of Cython as a language that is not covered by the 3xx or 4xx series.

• CEP 501 - Embedding Cython language extensions in valid Python syntax

• CEP 502 - Function overloading

• CEP 503 - Compile-time operator overloading

• CEP 504 - Easier pickling of cdef classes

• CEP 505 - Type inference

• CEP 506 - Parametrized types

• CEP 507 - Typing variables as Python builtin types

• CEP 508 - Compile-time computation/unrolling of functions

• CEP 509 - Method templates

• CEP 510 - Inlineable code in .pxd-files

• CEP 511 - Metaprogramming support

• CEP 512 - C arrays as first class types

• CEP 513 - pxd overlays on Python modules

• CEP 514 - Native buffer interface syntax support (Done)

• CEP 515 - Compiler directives (Done)

CEP 6xx - Optimizations

Generating smarter output C code.

• CEP 601 - Generate C switch statements (Done)

• CEP 602 - Optimizing various for..in-constructs

CEP 9xx - Cython internals

Changes in the internal Cython implementation.

• CEP 901 - Separate code tree transforms

• CEP 902 - Build parser from grammar file

• CEP 903 - Abstract syntax treeAST

• CEP 904 - Control flow graph

• CEP 905 - Separate phases

Exploring new concepts

• Common tree visitor APIs for different trees

• The uneval psuedo-function (unifying metaprogramming approaches)

• An approach to ctypes/types in numpy

• Assumptions

• If and how to intregrate stuff from PEX

• Parallel execution support

• Supporting C-level conditional compilation (e.g. emitting #ifdef)