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GeezerVison is showing github.com — cppjit/python/cppjit/_pythonization.py at main · compiler-research/cppjit Expand file tree/ Copy path_pythonization.pyMore file actions 360 lines (283 loc) · 12.2 KB / Copy path_pythonization.pyFile metadata and controls360 lines (283 loc) · 12.2 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 """Pythonization API.""" import re __all__ = [ "add_pythonization", "remove_pythonization", "pin_type", "add_type_reducer", ] def _set_backend(backend): global _backend _backend = backend # user-provided, general pythonizations def add_pythonization(pythonizor, scope=""): """<pythonizor> should be a callable taking two arguments: a class proxy, and its C++ name. It is called each time a named class from <scope> (the global one by default, but a relevant C++ namespace is recommended) is bound. """ return _backend.add_pythonization(pythonizor, scope) def remove_pythonization(pythonizor, scope=""): """Remove previously registered <pythonizor> from <scope>.""" return _backend.remove_pythonization(pythonizor, scope) # prevent auto-casting (e.g. for interfaces) def pin_type(klass): return _backend._pin_type(klass) # mapper to reduce template expression trees def add_type_reducer(reducable, reduced): """Reduce <reducable> to <reduced> type on returns from function calls.""" return _backend._add_type_reducer(reducable, reduced) # exception pythonizations def add_exception_mapping(cpp_exception, py_exception): _backend.UserExceptions[cpp_exception] = py_exception # --- Pythonization factories -------------------------------------------- def set_gil_policy(match_class, match_method, release_gil=True): return set_method_property( match_class, match_method, "__release_gil__", int(release_gil) ) def set_ownership_policy(match_class, match_method, python_owns_result): return set_method_property( match_class, match_method, "__creates__", int(python_owns_result) ) # NB: Ideally, we'd use the version commented out below, but for now, we # make do with the hackier version here. def rename_attribute(match_class, orig_attribute, new_attribute, keep_orig=False): class attribute_pythonizor(object): class getter(object): def __init__(self, attr): self.attr = attr def __call__(self, obj): return getattr(obj, self.attr) class setter(object): def __init__(self, attr): self.attr = attr def __call__(self, obj, value): return setattr(obj, self.attr, value) class deleter(object): def __init__(self, attr): self.attr = attr def __call__(self, obj): return delattr(obj, self.attr) def __init__(self, match_class, orig_attribute, new_attribute, keep_orig): self.match_class = re.compile(match_class) self.match_attr = re.compile(orig_attribute) self.new_attr = new_attribute self.keep_orig = keep_orig def __call__(self, obj, name): if not self.match_class.match(name): return for k in dir(obj): # .__dict__: if self.match_attr.match(k): tmp = property(self.getter(k), self.setter(k), self.deleter(k)) setattr(obj, self.new_attr, tmp) # if not self.keep_orig: delattr(obj, k) return attribute_pythonizor(match_class, orig_attribute, new_attribute, keep_orig) # def rename_attribute(match_class, orig_attribute, new_attribute, keep_orig=False): # class method_pythonizor: # def __init__(self, match_class, orig_attribute, new_attribute, keep_orig): # self.match_class = re.compile(match_class) # self.match_attr = re.compile(orig_attribute) # self.new_attr = new_attribute # self.keep_orig = keep_orig # def __call__(self, obj, name): # import sys # if not self.match_class.match(name): # return # sys.stderr.write("%s %s %s %s" % ("!!!", obj, name, "\n")) # for k in dir(obj): #obj.__dict__: # if not self.match_attr.match(k): continue # try: # tmp = getattr(obj, k) # except Exception as e: # continue # setattr(obj, self.new_attr, tmp) # if not self.keep_orig: delattr(obj, k) # return method_pythonizor(match_class, orig_attribute, new_attribute, keep_orig) # Shared with PyPy: def add_overload(match_class, match_method, overload): class method_pythonizor(object): def __init__(self, match_class, match_method, overload): self.match_class = re.compile(match_class) self.match_method = re.compile(match_method) self.overload = overload def __call__(self, obj, name): if not self.match_class.match(name): return for k in dir(obj): # .__dict__: try: tmp = getattr(obj, k) except: continue if self.match_method.match(k): try: tmp.__add_overload__(overload) except AttributeError: pass return method_pythonizor(match_class, match_method, overload) def compose_method(match_class, match_method, g): class composition_pythonizor(object): def __init__(self, match_class, match_method, g): self.match_class = re.compile(match_class) self.match_method = re.compile(match_method) self.g = g def __call__(self, obj, name): if not self.match_class.match(name): return g = self.g for k in obj.__dict__: if not self.match_method.match(k): continue try: f = getattr(obj, k) except: continue def make_fun(f, g): def h(self, *args, **kwargs): return g(self, f(self, *args, **kwargs)) return h h = make_fun(f, g) setattr(obj, k, h) return composition_pythonizor(match_class, match_method, g) def set_method_property(match_class, match_method, prop, value): class method_pythonizor(object): def __init__(self, match_class, match_method, prop, value): self.match_class = re.compile(match_class) self.match_method = re.compile(match_method) self.prop = prop self.value = value def __call__(self, obj, name): if not self.match_class.match(name): return for k in dir(obj): # .__dict__: try: tmp = getattr(obj, k) except: continue if self.match_method.match(k): setattr(tmp, self.prop, self.value) return method_pythonizor(match_class, match_method, prop, value) def make_property( match_class, match_get, match_set=None, match_del=None, prop_name=None ): class property_pythonizor(object): def __init__(self, match_class, match_get, match_set, match_del, prop_name): self.match_class = re.compile(match_class) self.match_get = re.compile(match_get) match_many_getters = self.match_get.groups == 1 if match_set: self.match_set = re.compile(match_set) match_many_setters = self.match_set.groups == 1 if match_many_getters ^ match_many_setters: raise ValueError("Must match getters and setters equally") else: self.match_set = None if match_del: self.match_del = re.compile(match_del) match_many_deleters = self.match_del.groups == 1 if match_many_getters ^ match_many_deleters: raise ValueError("Must match getters and deleters equally") else: self.match_del = None self.match_many = match_many_getters if not (self.match_many or prop_name): raise ValueError( "If not matching properties by regex, need a property name with exactly one substitution field" ) if self.match_many and prop_name: if prop_name.format(").!:(") == prop_name: raise ValueError( "If matching properties by regex and providing a property name, the name needs exactly one substitution field" ) self.prop_name = prop_name def make_get_del_proxy(self, getter): class proxy(object): def __init__(self, getter): self.getter = getter def __call__(self, obj): return getattr(obj, self.getter)() return proxy(getter) def make_set_proxy(self, setter): class proxy(object): def __init__(self, setter): self.setter = setter def __call__(self, obj, arg): return getattr(obj, self.setter)(arg) return proxy(setter) def __call__(self, obj, name): if not self.match_class.match(name): return names = [] named_getters = {} named_setters = {} named_deleters = {} if not self.match_many: fget, fset, fdel = None, None, None for k in dir(obj): # .__dict__: match = self.match_get.match(k) try: tmp = getattr(obj, k) except: continue if match and hasattr(tmp, "__call__"): if self.match_many: name = match.group(1) named_getters[name] = k else: fget = self.make_get_del_proxy(k) break if self.match_set: for k in dir(obj): # .__dict__: match = self.match_set.match(k) try: tmp = getattr(obj, k) except: continue if match and hasattr(tmp, "__call__"): if self.match_many: name = match.group(1) named_setters[name] = k else: fset = self.make_set_proxy(k) break if self.match_del: for k in dir(obj): # .__dict__: match = self.match_del.match(k) try: tmp = getattr(obj, k) except: continue if match and hasattr(tmp, "__call__"): if self.match_many: name = match.group(1) named_deleters[name] = k else: fdel = self.make_get_del_proxy(k) break if not self.match_many: new_prop = property(fget, fset, fdel) setattr(obj, self.prop_name, new_prop) return names += list(named_getters.keys()) names += list(named_setters.keys()) names += list(named_deleters.keys()) names = set(names) properties = [] # noqa: F841 for name in names: if name in named_getters: fget = self.make_get_del_proxy(named_getters[name]) else: fget = None if name in named_setters: fset = self.make_set_proxy(named_setters[name]) else: fset = None if name in named_deleters: fdel = self.make_get_del_proxy(named_deleters[name]) else: fdel = None new_prop = property(fget, fset, fdel) if self.prop_name: prop_name = self.prop_name.format(name) else: prop_name = name setattr(obj, prop_name, new_prop) return property_pythonizor(match_class, match_get, match_set, match_del, prop_name) |
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