1 See http://trac.cython.org/cython_trac and http://wiki.cython.org/enhancements 2 3 4 -- The Original Pyrex Todo List -- 5 6 DONE - Pointer-to-function types. 7 8 DONE - Nested declarators. 9 10 DONE - Varargs C func defs and calls. 11 12 DONE - * and ** args in Python func defs. 13 14 DONE - Default argument values. 15 16 DONE - Tracebacks. 17 18 DONE - Disallow creating char * from Python temporary anywhere 19 (not just on assignment). 20 21 DONE - Module and function and class doc strings. 22 23 DONE - Predeclare C functions. 24 25 DONE - Constant expressions. 26 27 DONE - Forward C struct declarations. 28 29 DONE - Prefix & operator. 30 31 DONE - Get rid of auto string->char coercion and 32 add a c'X' syntax for char literals. 33 34 DONE - Cascaded assignments (a = b = c). 35 36 DONE - 'include' statement for including other Pyrex files. 37 38 DONE - Add command line option for specifying name of generated C file. 39 40 DONE - Add 'else' clause to try-except. 41 42 DONE - Allow extension types to be declared "public" so they 43 can be accessed from another Pyrex module or a C file. 44 45 DONE - Don't try to generate objstruct definition for external 46 extension type declared without suite (treat as though 47 declared with empty suite). 48 49 DONE - Implement two-argument form of 'assert' statement. 50 51 Const types. 52 53 Tuple/list construction: Evaluate & store items one at a time? 54 55 Varargs argument traversal. 56 57 Use PyDict_SetItemString to build keyword arg dicts? 58 (Or wait until names are interned.) 59 60 Intern names. 61 62 print >>file 63 64 abs() and anything similar. 65 66 Semicolon-separated statement lists. 67 68 Optional semicolons after C declarations. 69 70 Multiple C declarations on one line? 71 72 Optimise return without value outside of try-finally. 73 74 exec statement. 75 76 from ... import statement. 77 78 Use iterator protocol for unpacking. 79 80 Save & restore exception being handled on function entry/exit. 81 82 In-place operators (+=, etc). 83 84 Constant declarations. Syntax? 85 86 DONE - Some way for C functions to signal Python errors? 87 88 Check for lack of return with value in non-void C functions? 89 90 Allow 'pass' in struct/union/enum definition. 91 92 Make C structs callable as constructors. 93 94 DONE - Provide way of specifying C names. 95 96 DONE - Public cdefs. 97 98 When calling user __dealloc__ func, save & restore exception. 99 100 DONE - Forward declaration of extension types. 101 102 Complex number parsetuple format? 103 104 DONE - long long type 105 106 DONE - long double type? 107 108 Windows __fooblarg function declaration things. 109 110 Generate type, var and func declarations in the same order that 111 they appear in the source file. 112 113 Provide a way of declaring a C function as returning a 114 borrowed Python reference. 115 116 Provide a way of specifying whether a Python object obtained 117 by casting a pointer should be treated as a new reference 118 or not. 119 120 Optimize integer for-loops. 121 122 Make sizeof() take types as well as variables. 123 124 Allow "unsigned" to be used alone as a type name. 125 126 Allow duplicate declarations, at least in extern-from. 127 128 Do something about installing proper version of pyrexc 129 script according to platform in setup.py. 130 131 DONE - Add "-o filename" command line option to unix/dos versions. 132 133 Recognise #line directives? 134 135 Catch floating point exceptions? 136 137 Check that forward-declared non-external extension types 138 are defined. 139 140 Generate type test when casting from one Python type 141 to another. 142 143 Generate a Pyrex include file for public declarations 144 as well as a C one. 145 146 Syntax for defining indefinite-sized int & float types. 147 148 Allow ranges of exception values. 149 150 Support "complex double" and "complex float"? 151 152 Allow module-level Python variables to be declared extern. 153 154 Consider: 155 >cdef extern from "foo.h": 156 > int dosomething() except -1 raise MyException 157 158 Properties for Python types. 159 160 DONE - Properties for extension types. 161 162 Find a way to make classmethod and staticmethod work better. 163 164 DONE - Document workarounds for classmethod and staticmethod. 165 166 Statically initialised C arrays & structs. 167 168 Reduce generation of unused vars and unreachable code? 169 170 Support for acquiring and releasing GIL. 171 172 Make docstrings of extension type special methods work. 173 174 Treat result of getting C attribute of extension type as non-ephemeral. 175 176 Make None a reserved identifier. 177 178 Teach it about builtin functions that correspond to 179 Python/C API calls. 180 181 Teach it about common builtin types. 182 183 Option for generating a main() function? 184 185 DONE - Allow an extension type to inherit from another type. 186 187 Do something about external C functions declared as returning 188 const * types? 189 190 Use PyString_FromStringAndSize for string literals? 191 192 DONE - C functions as methods of extension types. 193 194 What to do about __name__ etc. attributes of a module (they are 195 currently assumed to be built-in names). 196 197 Use PyDict_GetItem etc. on module & builtins dicts for speed. 198 199 Intern all string literals used as Python strings? 200 [Koshy <jkoshy (a] freebsd.org>] 201 202 Make extension types weak-referenceable. 203 [Matthias Baas <baas (a] ira.uka.de>] 204 205 Make 'pass' work in the body of an extern-from struct 206 or union. 207 208 Disallow a filename which results in an illegal identifier when 209 used as a module name. 210 211 Use ctypedef names. 212 213 Provide an easy way of exposing a set of enum values as Python names. 214 [John J Lee <jjl (a] pobox.com>] 215 216 Prevent user from returning a value from special methods that 217 return an error indicator only. 218 219 Use PyObject_TypeCheck instead of PyObject_IsInstance? 220 221 Allow * in cimport? [John J Lee <jjl (a] pobox.com>] 222 223 FAQ: Q. Pyrex says my extension type object has no attribute 'rhubarb', but 224 I know it does. 225 226 A. Have you declared the type at the point where you're using it? 227 228 Eliminate lvalue casts! (Illegal in C++, also disallowed by some C compilers) 229 [Matthias Baas <baas (a] ira.uka.de>] 230 231 Make Python class construction work more like it does in Python. 232 233 Give the right module name to Python classes. 234 235 Command line switch for full pathnames in backtraces? 236 237 Use PyString_FromStringAndSize on string literals containing 238 nulls. 239 240 Peephole optimisation? [Vladislav Bulatov <vrbulatov (a] list.ru>] 241 242 Avoid PyArg_ParseTuple call when a function takes no positional args. 243 244 Omit incref/decref of arguments that are not assigned to? 245 246 Can a faster way of instantiating extension types be found? 247 248 Disallow declaring a special method of an extension type with 249 'cdef' instead of 'def'. 250 251 Use PySequence_GetItem instead of PyObject_GetItem when index 252 is an integer. 253 254 If a __getitem__ method is declared with an int index, use the 255 sq_item slot instead of the mp_subscript slot. 256 257 Provide some way of controlling the argument list passed to 258 an extension type's base __new__ method? 259 [Alain Pointdexter <alainpoint (a] yahoo.fr>] 260 261 Rename __new__ in extension types to __alloc__. 262 263 Implement a true __new__ for extension types. 264 265 Way to provide constructors for extension types that are not 266 available to Python and can accept C types directly? 267 268 Support generators by turning them into extension types? 269 270 List comprehensions. 271 272 Variable declarations inside inner code blocks? 273 274 Initial values when declaring variables? 275 276 Do something about __stdcall. 277 278 Support class methods in extension types using METH_CLASS flag. 279 280 Disallow defaulting types to 'object' in C declarations? 281 282 C globals with static initialisers. 283 284 Find a way of providing C-only initialisers for extension types. 285 286 Metaclasses for extension types? 287 288 Make extension types use Py_TPFLAGS_HEAPTYPE so their __module__ 289 will get set dynamically? 290
