| paul@113 | 1 | #!/usr/bin/env python |
| paul@113 | 2 | |
| paul@113 | 3 | """ |
| paul@113 | 4 | Translate programs. |
| paul@113 | 5 | |
| paul@113 | 6 | Copyright (C) 2015, 2016 Paul Boddie <paul@boddie.org.uk> |
| paul@113 | 7 | |
| paul@113 | 8 | This program is free software; you can redistribute it and/or modify it under |
| paul@113 | 9 | the terms of the GNU General Public License as published by the Free Software |
| paul@113 | 10 | Foundation; either version 3 of the License, or (at your option) any later |
| paul@113 | 11 | version. |
| paul@113 | 12 | |
| paul@113 | 13 | This program is distributed in the hope that it will be useful, but WITHOUT |
| paul@113 | 14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
| paul@113 | 15 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more |
| paul@113 | 16 | details. |
| paul@113 | 17 | |
| paul@113 | 18 | You should have received a copy of the GNU General Public License along with |
| paul@113 | 19 | this program. If not, see <http://www.gnu.org/licenses/>. |
| paul@113 | 20 | """ |
| paul@113 | 21 | |
| paul@113 | 22 | from common import * |
| paul@113 | 23 | from encoders import * |
| paul@113 | 24 | from os.path import exists, join |
| paul@113 | 25 | from os import makedirs |
| paul@314 | 26 | from referencing import Reference |
| paul@113 | 27 | import compiler |
| paul@113 | 28 | import results |
| paul@113 | 29 | |
| paul@113 | 30 | class Translator(CommonOutput): |
| paul@113 | 31 | |
| paul@113 | 32 | "A program translator." |
| paul@113 | 33 | |
| paul@113 | 34 | def __init__(self, importer, deducer, optimiser, output): |
| paul@113 | 35 | self.importer = importer |
| paul@113 | 36 | self.deducer = deducer |
| paul@113 | 37 | self.optimiser = optimiser |
| paul@113 | 38 | self.output = output |
| paul@113 | 39 | |
| paul@113 | 40 | def to_output(self): |
| paul@113 | 41 | output = join(self.output, "src") |
| paul@113 | 42 | |
| paul@113 | 43 | if not exists(output): |
| paul@113 | 44 | makedirs(output) |
| paul@113 | 45 | |
| paul@113 | 46 | self.check_output() |
| paul@113 | 47 | |
| paul@113 | 48 | for module in self.importer.modules.values(): |
| paul@161 | 49 | if module.name != "native": |
| paul@161 | 50 | tm = TranslatedModule(module.name, self.importer, self.deducer, self.optimiser) |
| paul@161 | 51 | tm.translate(module.filename, join(output, "%s.c" % module.name)) |
| paul@113 | 52 | |
| paul@113 | 53 | # Classes representing intermediate translation results. |
| paul@113 | 54 | |
| paul@113 | 55 | class TranslationResult: |
| paul@113 | 56 | |
| paul@113 | 57 | "An abstract translation result mix-in." |
| paul@113 | 58 | |
| paul@234 | 59 | def get_accessor_kinds(self): |
| paul@234 | 60 | return None |
| paul@113 | 61 | |
| paul@144 | 62 | class ReturnRef(TranslationResult): |
| paul@144 | 63 | |
| paul@144 | 64 | "Indicates usage of a return statement." |
| paul@144 | 65 | |
| paul@144 | 66 | pass |
| paul@144 | 67 | |
| paul@113 | 68 | class Expression(results.Result, TranslationResult): |
| paul@113 | 69 | |
| paul@113 | 70 | "A general expression." |
| paul@113 | 71 | |
| paul@113 | 72 | def __init__(self, s): |
| paul@113 | 73 | self.s = s |
| paul@113 | 74 | def __str__(self): |
| paul@113 | 75 | return self.s |
| paul@113 | 76 | def __repr__(self): |
| paul@113 | 77 | return "Expression(%r)" % self.s |
| paul@113 | 78 | |
| paul@113 | 79 | class TrResolvedNameRef(results.ResolvedNameRef, TranslationResult): |
| paul@113 | 80 | |
| paul@113 | 81 | "A reference to a name in the translation." |
| paul@113 | 82 | |
| paul@208 | 83 | def __init__(self, name, ref, expr=None, parameter=None): |
| paul@208 | 84 | results.ResolvedNameRef.__init__(self, name, ref, expr) |
| paul@208 | 85 | self.parameter = parameter |
| paul@208 | 86 | |
| paul@113 | 87 | def __str__(self): |
| paul@113 | 88 | |
| paul@113 | 89 | "Return an output representation of the referenced name." |
| paul@113 | 90 | |
| paul@113 | 91 | # For sources, any identified static origin will be constant and thus |
| paul@113 | 92 | # usable directly. For targets, no constant should be assigned and thus |
| paul@113 | 93 | # the alias (or any plain name) will be used. |
| paul@113 | 94 | |
| paul@137 | 95 | ref = self.static() |
| paul@137 | 96 | origin = ref and self.get_origin() |
| paul@137 | 97 | static_name = origin and encode_path(origin) |
| paul@149 | 98 | |
| paul@149 | 99 | # Determine whether a qualified name is involved. |
| paul@149 | 100 | |
| paul@338 | 101 | t = (not self.is_constant_alias() and self.get_name() or self.name).rsplit(".", 1) |
| paul@149 | 102 | parent = len(t) > 1 and t[0] or None |
| paul@338 | 103 | attrname = t[-1] and encode_path(t[-1]) |
| paul@113 | 104 | |
| paul@113 | 105 | # Assignments. |
| paul@113 | 106 | |
| paul@113 | 107 | if self.expr: |
| paul@113 | 108 | |
| paul@113 | 109 | # Eliminate assignments between constants. |
| paul@113 | 110 | |
| paul@196 | 111 | if ref and isinstance(self.expr, results.ResolvedNameRef) and self.expr.static(): |
| paul@113 | 112 | return "" |
| paul@149 | 113 | |
| paul@149 | 114 | # Qualified names must be converted into parent-relative assignments. |
| paul@149 | 115 | |
| paul@149 | 116 | elif parent: |
| paul@149 | 117 | return "__store_via_object(&%s, %s, %s)" % ( |
| paul@149 | 118 | encode_path(parent), encode_symbol("pos", attrname), self.expr) |
| paul@149 | 119 | |
| paul@149 | 120 | # All other assignments involve the names as they were given. |
| paul@149 | 121 | |
| paul@113 | 122 | else: |
| paul@208 | 123 | return "(%s%s) = %s" % (self.parameter and "*" or "", attrname, self.expr) |
| paul@113 | 124 | |
| paul@113 | 125 | # Expressions. |
| paul@113 | 126 | |
| paul@137 | 127 | elif static_name: |
| paul@137 | 128 | parent = ref.parent() |
| paul@141 | 129 | context = ref.has_kind("<function>") and encode_path(parent) or None |
| paul@144 | 130 | return "((__attr) {%s, &%s})" % (context and "&%s" % context or "0", static_name) |
| paul@137 | 131 | |
| paul@152 | 132 | # Qualified names must be converted into parent-relative accesses. |
| paul@152 | 133 | |
| paul@152 | 134 | elif parent: |
| paul@152 | 135 | return "__load_via_object(&%s, %s)" % ( |
| paul@152 | 136 | encode_path(parent), encode_symbol("pos", attrname)) |
| paul@152 | 137 | |
| paul@152 | 138 | # All other accesses involve the names as they were given. |
| paul@152 | 139 | |
| paul@113 | 140 | else: |
| paul@208 | 141 | return "(%s%s)" % (self.parameter and "*" or "", attrname) |
| paul@113 | 142 | |
| paul@113 | 143 | class TrConstantValueRef(results.ConstantValueRef, TranslationResult): |
| paul@113 | 144 | |
| paul@113 | 145 | "A constant value reference in the translation." |
| paul@113 | 146 | |
| paul@113 | 147 | def __str__(self): |
| paul@136 | 148 | return encode_literal_constant(self.number) |
| paul@113 | 149 | |
| paul@113 | 150 | class TrLiteralSequenceRef(results.LiteralSequenceRef, TranslationResult): |
| paul@113 | 151 | |
| paul@113 | 152 | "A reference representing a sequence of values." |
| paul@113 | 153 | |
| paul@113 | 154 | def __str__(self): |
| paul@113 | 155 | return str(self.node) |
| paul@113 | 156 | |
| paul@317 | 157 | class TrInstanceRef(results.InstanceRef, TranslationResult): |
| paul@317 | 158 | |
| paul@317 | 159 | "A reference representing instantiation of a class." |
| paul@317 | 160 | |
| paul@317 | 161 | def __init__(self, ref, expr): |
| paul@317 | 162 | |
| paul@317 | 163 | """ |
| paul@317 | 164 | Initialise the reference with 'ref' indicating the nature of the |
| paul@317 | 165 | reference and 'expr' being an expression used to create the instance. |
| paul@317 | 166 | """ |
| paul@317 | 167 | |
| paul@317 | 168 | results.InstanceRef.__init__(self, ref) |
| paul@317 | 169 | self.expr = expr |
| paul@317 | 170 | |
| paul@317 | 171 | def __str__(self): |
| paul@317 | 172 | return self.expr |
| paul@317 | 173 | |
| paul@317 | 174 | def __repr__(self): |
| paul@317 | 175 | return "TrResolvedInstanceRef(%r, %r)" % (self.ref, self.expr) |
| paul@317 | 176 | |
| paul@113 | 177 | class AttrResult(Expression, TranslationResult): |
| paul@113 | 178 | |
| paul@113 | 179 | "A translation result for an attribute access." |
| paul@113 | 180 | |
| paul@234 | 181 | def __init__(self, s, refs, accessor_kinds): |
| paul@113 | 182 | Expression.__init__(self, s) |
| paul@113 | 183 | self.refs = refs |
| paul@234 | 184 | self.accessor_kinds = accessor_kinds |
| paul@113 | 185 | |
| paul@113 | 186 | def get_origin(self): |
| paul@113 | 187 | return self.refs and len(self.refs) == 1 and first(self.refs).get_origin() |
| paul@113 | 188 | |
| paul@118 | 189 | def has_kind(self, kinds): |
| paul@118 | 190 | if not self.refs: |
| paul@118 | 191 | return False |
| paul@118 | 192 | for ref in self.refs: |
| paul@118 | 193 | if ref.has_kind(kinds): |
| paul@118 | 194 | return True |
| paul@118 | 195 | return False |
| paul@118 | 196 | |
| paul@234 | 197 | def get_accessor_kinds(self): |
| paul@234 | 198 | return self.accessor_kinds |
| paul@234 | 199 | |
| paul@113 | 200 | def __repr__(self): |
| paul@136 | 201 | return "AttrResult(%r, %r)" % (self.s, self.get_origin()) |
| paul@113 | 202 | |
| paul@113 | 203 | class PredefinedConstantRef(AttrResult): |
| paul@113 | 204 | |
| paul@113 | 205 | "A predefined constant reference." |
| paul@113 | 206 | |
| paul@113 | 207 | def __init__(self, value): |
| paul@113 | 208 | self.value = value |
| paul@113 | 209 | |
| paul@113 | 210 | def __str__(self): |
| paul@136 | 211 | if self.value in ("False", "True"): |
| paul@158 | 212 | return encode_path("__builtins__.boolean.%s" % self.value) |
| paul@136 | 213 | elif self.value == "None": |
| paul@136 | 214 | return encode_path("__builtins__.none.%s" % self.value) |
| paul@136 | 215 | elif self.value == "NotImplemented": |
| paul@136 | 216 | return encode_path("__builtins__.notimplemented.%s" % self.value) |
| paul@136 | 217 | else: |
| paul@136 | 218 | return self.value |
| paul@113 | 219 | |
| paul@113 | 220 | def __repr__(self): |
| paul@113 | 221 | return "PredefinedConstantRef(%r)" % self.value |
| paul@113 | 222 | |
| paul@141 | 223 | class BooleanResult(Expression, TranslationResult): |
| paul@141 | 224 | |
| paul@141 | 225 | "A expression producing a boolean result." |
| paul@141 | 226 | |
| paul@141 | 227 | def __str__(self): |
| paul@141 | 228 | return "__builtins___bool_bool(%s)" % self.s |
| paul@141 | 229 | |
| paul@141 | 230 | def __repr__(self): |
| paul@141 | 231 | return "BooleanResult(%r)" % self.s |
| paul@141 | 232 | |
| paul@113 | 233 | def make_expression(expr): |
| paul@113 | 234 | |
| paul@113 | 235 | "Make a new expression from the existing 'expr'." |
| paul@113 | 236 | |
| paul@113 | 237 | if isinstance(expr, results.Result): |
| paul@113 | 238 | return expr |
| paul@113 | 239 | else: |
| paul@113 | 240 | return Expression(str(expr)) |
| paul@113 | 241 | |
| paul@113 | 242 | # The actual translation process itself. |
| paul@113 | 243 | |
| paul@113 | 244 | class TranslatedModule(CommonModule): |
| paul@113 | 245 | |
| paul@113 | 246 | "A module translator." |
| paul@113 | 247 | |
| paul@113 | 248 | def __init__(self, name, importer, deducer, optimiser): |
| paul@113 | 249 | CommonModule.__init__(self, name, importer) |
| paul@113 | 250 | self.deducer = deducer |
| paul@113 | 251 | self.optimiser = optimiser |
| paul@113 | 252 | |
| paul@113 | 253 | # Output stream. |
| paul@113 | 254 | |
| paul@113 | 255 | self.out = None |
| paul@113 | 256 | self.indent = 0 |
| paul@113 | 257 | self.tabstop = " " |
| paul@113 | 258 | |
| paul@113 | 259 | # Recorded namespaces. |
| paul@113 | 260 | |
| paul@113 | 261 | self.namespaces = [] |
| paul@113 | 262 | self.in_conditional = False |
| paul@113 | 263 | |
| paul@144 | 264 | # Exception raising adjustments. |
| paul@144 | 265 | |
| paul@144 | 266 | self.in_try_finally = False |
| paul@189 | 267 | self.in_try_except = False |
| paul@144 | 268 | |
| paul@237 | 269 | # Attribute access and accessor counting. |
| paul@113 | 270 | |
| paul@113 | 271 | self.attr_accesses = {} |
| paul@237 | 272 | self.attr_accessors = {} |
| paul@113 | 273 | |
| paul@113 | 274 | def __repr__(self): |
| paul@113 | 275 | return "TranslatedModule(%r, %r)" % (self.name, self.importer) |
| paul@113 | 276 | |
| paul@113 | 277 | def translate(self, filename, output_filename): |
| paul@113 | 278 | |
| paul@113 | 279 | """ |
| paul@113 | 280 | Parse the file having the given 'filename', writing the translation to |
| paul@113 | 281 | the given 'output_filename'. |
| paul@113 | 282 | """ |
| paul@113 | 283 | |
| paul@113 | 284 | self.parse_file(filename) |
| paul@113 | 285 | |
| paul@113 | 286 | # Collect function namespaces for separate processing. |
| paul@113 | 287 | |
| paul@113 | 288 | self.record_namespaces(self.astnode) |
| paul@113 | 289 | |
| paul@113 | 290 | # Reset the lambda naming (in order to obtain the same names again) and |
| paul@113 | 291 | # translate the program. |
| paul@113 | 292 | |
| paul@113 | 293 | self.reset_lambdas() |
| paul@113 | 294 | |
| paul@113 | 295 | self.out = open(output_filename, "w") |
| paul@113 | 296 | try: |
| paul@128 | 297 | self.start_output() |
| paul@128 | 298 | |
| paul@113 | 299 | # Process namespaces, writing the translation. |
| paul@113 | 300 | |
| paul@113 | 301 | for path, node in self.namespaces: |
| paul@113 | 302 | self.process_namespace(path, node) |
| paul@113 | 303 | |
| paul@113 | 304 | # Process the module namespace including class namespaces. |
| paul@113 | 305 | |
| paul@113 | 306 | self.process_namespace([], self.astnode) |
| paul@113 | 307 | |
| paul@113 | 308 | finally: |
| paul@113 | 309 | self.out.close() |
| paul@113 | 310 | |
| paul@113 | 311 | def have_object(self): |
| paul@113 | 312 | |
| paul@113 | 313 | "Return whether a namespace is a recorded object." |
| paul@113 | 314 | |
| paul@113 | 315 | return self.importer.objects.get(self.get_namespace_path()) |
| paul@113 | 316 | |
| paul@156 | 317 | def get_builtin_class(self, name): |
| paul@156 | 318 | |
| paul@156 | 319 | "Return a reference to the actual object providing 'name'." |
| paul@156 | 320 | |
| paul@156 | 321 | # NOTE: This makes assumptions about the __builtins__ structure. |
| paul@113 | 322 | |
| paul@158 | 323 | return self.importer.get_object("__builtins__.%s.%s" % (name, name)) |
| paul@156 | 324 | |
| paul@156 | 325 | def is_method(self, path): |
| paul@156 | 326 | |
| paul@156 | 327 | "Return whether 'path' is a method." |
| paul@156 | 328 | |
| paul@113 | 329 | class_name, method_name = path.rsplit(".", 1) |
| paul@267 | 330 | return self.importer.classes.has_key(class_name) and class_name or None |
| paul@113 | 331 | |
| paul@208 | 332 | def in_method(self): |
| paul@208 | 333 | |
| paul@208 | 334 | "Return whether the current namespace provides a method." |
| paul@208 | 335 | |
| paul@208 | 336 | return self.in_function and self.is_method(self.get_namespace_path()) |
| paul@208 | 337 | |
| paul@113 | 338 | # Namespace recording. |
| paul@113 | 339 | |
| paul@113 | 340 | def record_namespaces(self, node): |
| paul@113 | 341 | |
| paul@113 | 342 | "Process the program structure 'node', recording namespaces." |
| paul@113 | 343 | |
| paul@113 | 344 | for n in node.getChildNodes(): |
| paul@113 | 345 | self.record_namespaces_in_node(n) |
| paul@113 | 346 | |
| paul@113 | 347 | def record_namespaces_in_node(self, node): |
| paul@113 | 348 | |
| paul@113 | 349 | "Process the program structure 'node', recording namespaces." |
| paul@113 | 350 | |
| paul@113 | 351 | # Function namespaces within modules, classes and other functions. |
| paul@113 | 352 | # Functions appearing within conditional statements are given arbitrary |
| paul@113 | 353 | # names. |
| paul@113 | 354 | |
| paul@113 | 355 | if isinstance(node, compiler.ast.Function): |
| paul@113 | 356 | self.record_function_node(node, (self.in_conditional or self.in_function) and self.get_lambda_name() or node.name) |
| paul@113 | 357 | |
| paul@113 | 358 | elif isinstance(node, compiler.ast.Lambda): |
| paul@113 | 359 | self.record_function_node(node, self.get_lambda_name()) |
| paul@113 | 360 | |
| paul@113 | 361 | # Classes are visited, but may be ignored if inside functions. |
| paul@113 | 362 | |
| paul@113 | 363 | elif isinstance(node, compiler.ast.Class): |
| paul@113 | 364 | self.enter_namespace(node.name) |
| paul@113 | 365 | if self.have_object(): |
| paul@113 | 366 | self.record_namespaces(node) |
| paul@113 | 367 | self.exit_namespace() |
| paul@113 | 368 | |
| paul@113 | 369 | # Conditional nodes are tracked so that function definitions may be |
| paul@113 | 370 | # handled. Since "for" loops are converted to "while" loops, they are |
| paul@113 | 371 | # included here. |
| paul@113 | 372 | |
| paul@113 | 373 | elif isinstance(node, (compiler.ast.For, compiler.ast.If, compiler.ast.While)): |
| paul@113 | 374 | in_conditional = self.in_conditional |
| paul@113 | 375 | self.in_conditional = True |
| paul@113 | 376 | self.record_namespaces(node) |
| paul@113 | 377 | self.in_conditional = in_conditional |
| paul@113 | 378 | |
| paul@113 | 379 | # All other nodes are processed depth-first. |
| paul@113 | 380 | |
| paul@113 | 381 | else: |
| paul@113 | 382 | self.record_namespaces(node) |
| paul@113 | 383 | |
| paul@113 | 384 | def record_function_node(self, n, name): |
| paul@113 | 385 | |
| paul@113 | 386 | """ |
| paul@113 | 387 | Record the given function, lambda, if expression or list comprehension |
| paul@113 | 388 | node 'n' with the given 'name'. |
| paul@113 | 389 | """ |
| paul@113 | 390 | |
| paul@113 | 391 | self.in_function = True |
| paul@113 | 392 | self.enter_namespace(name) |
| paul@113 | 393 | |
| paul@113 | 394 | if self.have_object(): |
| paul@113 | 395 | |
| paul@113 | 396 | # Record the namespace path and the node itself. |
| paul@113 | 397 | |
| paul@113 | 398 | self.namespaces.append((self.namespace_path[:], n)) |
| paul@113 | 399 | self.record_namespaces_in_node(n.code) |
| paul@113 | 400 | |
| paul@113 | 401 | self.exit_namespace() |
| paul@113 | 402 | self.in_function = False |
| paul@113 | 403 | |
| paul@113 | 404 | # Constant referencing. |
| paul@113 | 405 | |
| paul@113 | 406 | def get_literal_instance(self, n, name): |
| paul@113 | 407 | |
| paul@113 | 408 | """ |
| paul@113 | 409 | For node 'n', return a reference for the type of the given 'name'. |
| paul@113 | 410 | """ |
| paul@113 | 411 | |
| paul@156 | 412 | ref = self.get_builtin_class(name) |
| paul@113 | 413 | |
| paul@113 | 414 | if name in ("dict", "list", "tuple"): |
| paul@113 | 415 | return self.process_literal_sequence_node(n, name, ref, TrLiteralSequenceRef) |
| paul@113 | 416 | else: |
| paul@113 | 417 | path = self.get_namespace_path() |
| paul@113 | 418 | local_number = self.importer.all_constants[path][n.value] |
| paul@113 | 419 | constant_name = "$c%d" % local_number |
| paul@113 | 420 | objpath = self.get_object_path(constant_name) |
| paul@113 | 421 | number = self.optimiser.constant_numbers[objpath] |
| paul@113 | 422 | return TrConstantValueRef(constant_name, ref.instance_of(), n.value, number) |
| paul@113 | 423 | |
| paul@113 | 424 | # Namespace translation. |
| paul@113 | 425 | |
| paul@113 | 426 | def process_namespace(self, path, node): |
| paul@113 | 427 | |
| paul@113 | 428 | """ |
| paul@113 | 429 | Process the namespace for the given 'path' defined by the given 'node'. |
| paul@113 | 430 | """ |
| paul@113 | 431 | |
| paul@113 | 432 | self.namespace_path = path |
| paul@113 | 433 | |
| paul@113 | 434 | if isinstance(node, (compiler.ast.Function, compiler.ast.Lambda)): |
| paul@113 | 435 | self.in_function = True |
| paul@113 | 436 | self.process_function_body_node(node) |
| paul@113 | 437 | else: |
| paul@113 | 438 | self.in_function = False |
| paul@192 | 439 | self.function_target = 0 |
| paul@113 | 440 | self.start_module() |
| paul@113 | 441 | self.process_structure(node) |
| paul@113 | 442 | self.end_module() |
| paul@113 | 443 | |
| paul@113 | 444 | def process_structure(self, node): |
| paul@113 | 445 | |
| paul@113 | 446 | "Process the given 'node' or result." |
| paul@113 | 447 | |
| paul@144 | 448 | # Handle processing requests on results. |
| paul@144 | 449 | |
| paul@113 | 450 | if isinstance(node, results.Result): |
| paul@113 | 451 | return node |
| paul@144 | 452 | |
| paul@144 | 453 | # Handle processing requests on nodes. |
| paul@144 | 454 | |
| paul@113 | 455 | else: |
| paul@144 | 456 | l = CommonModule.process_structure(self, node) |
| paul@144 | 457 | |
| paul@144 | 458 | # Return indications of return statement usage. |
| paul@144 | 459 | |
| paul@144 | 460 | if l and isinstance(l[-1], ReturnRef): |
| paul@144 | 461 | return l[-1] |
| paul@144 | 462 | else: |
| paul@144 | 463 | return None |
| paul@113 | 464 | |
| paul@113 | 465 | def process_structure_node(self, n): |
| paul@113 | 466 | |
| paul@113 | 467 | "Process the individual node 'n'." |
| paul@113 | 468 | |
| paul@113 | 469 | # Plain statements emit their expressions. |
| paul@113 | 470 | |
| paul@113 | 471 | if isinstance(n, compiler.ast.Discard): |
| paul@113 | 472 | expr = self.process_structure_node(n.expr) |
| paul@113 | 473 | self.statement(expr) |
| paul@113 | 474 | |
| paul@314 | 475 | # Module import declarations. |
| paul@314 | 476 | |
| paul@314 | 477 | elif isinstance(n, compiler.ast.From): |
| paul@314 | 478 | self.process_from_node(n) |
| paul@314 | 479 | |
| paul@113 | 480 | # Nodes using operator module functions. |
| paul@113 | 481 | |
| paul@113 | 482 | elif isinstance(n, compiler.ast.Operator): |
| paul@113 | 483 | return self.process_operator_node(n) |
| paul@113 | 484 | |
| paul@113 | 485 | elif isinstance(n, compiler.ast.AugAssign): |
| paul@113 | 486 | self.process_augassign_node(n) |
| paul@113 | 487 | |
| paul@113 | 488 | elif isinstance(n, compiler.ast.Compare): |
| paul@113 | 489 | return self.process_compare_node(n) |
| paul@113 | 490 | |
| paul@113 | 491 | elif isinstance(n, compiler.ast.Slice): |
| paul@113 | 492 | return self.process_slice_node(n) |
| paul@113 | 493 | |
| paul@113 | 494 | elif isinstance(n, compiler.ast.Sliceobj): |
| paul@113 | 495 | return self.process_sliceobj_node(n) |
| paul@113 | 496 | |
| paul@113 | 497 | elif isinstance(n, compiler.ast.Subscript): |
| paul@113 | 498 | return self.process_subscript_node(n) |
| paul@113 | 499 | |
| paul@113 | 500 | # Classes are visited, but may be ignored if inside functions. |
| paul@113 | 501 | |
| paul@113 | 502 | elif isinstance(n, compiler.ast.Class): |
| paul@113 | 503 | self.process_class_node(n) |
| paul@113 | 504 | |
| paul@113 | 505 | # Functions within namespaces have any dynamic defaults initialised. |
| paul@113 | 506 | |
| paul@113 | 507 | elif isinstance(n, compiler.ast.Function): |
| paul@113 | 508 | self.process_function_node(n) |
| paul@113 | 509 | |
| paul@113 | 510 | # Lambdas are replaced with references to separately-generated |
| paul@113 | 511 | # functions. |
| paul@113 | 512 | |
| paul@113 | 513 | elif isinstance(n, compiler.ast.Lambda): |
| paul@113 | 514 | return self.process_lambda_node(n) |
| paul@113 | 515 | |
| paul@113 | 516 | # Assignments. |
| paul@113 | 517 | |
| paul@113 | 518 | elif isinstance(n, compiler.ast.Assign): |
| paul@113 | 519 | |
| paul@113 | 520 | # Handle each assignment node. |
| paul@113 | 521 | |
| paul@113 | 522 | for node in n.nodes: |
| paul@113 | 523 | self.process_assignment_node(node, n.expr) |
| paul@113 | 524 | |
| paul@113 | 525 | # Accesses. |
| paul@113 | 526 | |
| paul@113 | 527 | elif isinstance(n, compiler.ast.Getattr): |
| paul@113 | 528 | return self.process_attribute_access(n) |
| paul@113 | 529 | |
| paul@113 | 530 | # Names. |
| paul@113 | 531 | |
| paul@113 | 532 | elif isinstance(n, compiler.ast.Name): |
| paul@113 | 533 | return self.process_name_node(n) |
| paul@113 | 534 | |
| paul@113 | 535 | # Loops and conditionals. |
| paul@113 | 536 | |
| paul@113 | 537 | elif isinstance(n, compiler.ast.For): |
| paul@113 | 538 | self.process_for_node(n) |
| paul@113 | 539 | |
| paul@113 | 540 | elif isinstance(n, compiler.ast.While): |
| paul@113 | 541 | self.process_while_node(n) |
| paul@113 | 542 | |
| paul@113 | 543 | elif isinstance(n, compiler.ast.If): |
| paul@113 | 544 | self.process_if_node(n) |
| paul@113 | 545 | |
| paul@113 | 546 | elif isinstance(n, (compiler.ast.And, compiler.ast.Or)): |
| paul@113 | 547 | return self.process_logical_node(n) |
| paul@113 | 548 | |
| paul@113 | 549 | elif isinstance(n, compiler.ast.Not): |
| paul@113 | 550 | return self.process_not_node(n) |
| paul@113 | 551 | |
| paul@113 | 552 | # Exception control-flow tracking. |
| paul@113 | 553 | |
| paul@113 | 554 | elif isinstance(n, compiler.ast.TryExcept): |
| paul@113 | 555 | self.process_try_node(n) |
| paul@113 | 556 | |
| paul@113 | 557 | elif isinstance(n, compiler.ast.TryFinally): |
| paul@113 | 558 | self.process_try_finally_node(n) |
| paul@113 | 559 | |
| paul@113 | 560 | # Control-flow modification statements. |
| paul@113 | 561 | |
| paul@113 | 562 | elif isinstance(n, compiler.ast.Break): |
| paul@128 | 563 | self.writestmt("break;") |
| paul@113 | 564 | |
| paul@113 | 565 | elif isinstance(n, compiler.ast.Continue): |
| paul@128 | 566 | self.writestmt("continue;") |
| paul@113 | 567 | |
| paul@144 | 568 | elif isinstance(n, compiler.ast.Raise): |
| paul@144 | 569 | self.process_raise_node(n) |
| paul@144 | 570 | |
| paul@113 | 571 | elif isinstance(n, compiler.ast.Return): |
| paul@144 | 572 | return self.process_return_node(n) |
| paul@113 | 573 | |
| paul@173 | 574 | # Print statements. |
| paul@173 | 575 | |
| paul@173 | 576 | elif isinstance(n, (compiler.ast.Print, compiler.ast.Printnl)): |
| paul@173 | 577 | self.statement(self.process_print_node(n)) |
| paul@173 | 578 | |
| paul@113 | 579 | # Invocations. |
| paul@113 | 580 | |
| paul@113 | 581 | elif isinstance(n, compiler.ast.CallFunc): |
| paul@113 | 582 | return self.process_invocation_node(n) |
| paul@113 | 583 | |
| paul@113 | 584 | elif isinstance(n, compiler.ast.Keyword): |
| paul@113 | 585 | return self.process_structure_node(n.expr) |
| paul@113 | 586 | |
| paul@113 | 587 | # Constant usage. |
| paul@113 | 588 | |
| paul@113 | 589 | elif isinstance(n, compiler.ast.Const): |
| paul@113 | 590 | return self.get_literal_instance(n, n.value.__class__.__name__) |
| paul@113 | 591 | |
| paul@113 | 592 | elif isinstance(n, compiler.ast.Dict): |
| paul@113 | 593 | return self.get_literal_instance(n, "dict") |
| paul@113 | 594 | |
| paul@113 | 595 | elif isinstance(n, compiler.ast.List): |
| paul@113 | 596 | return self.get_literal_instance(n, "list") |
| paul@113 | 597 | |
| paul@113 | 598 | elif isinstance(n, compiler.ast.Tuple): |
| paul@113 | 599 | return self.get_literal_instance(n, "tuple") |
| paul@113 | 600 | |
| paul@113 | 601 | # All other nodes are processed depth-first. |
| paul@113 | 602 | |
| paul@113 | 603 | else: |
| paul@144 | 604 | return self.process_structure(n) |
| paul@113 | 605 | |
| paul@113 | 606 | def process_assignment_node(self, n, expr): |
| paul@113 | 607 | |
| paul@113 | 608 | "Process the individual node 'n' to be assigned the contents of 'expr'." |
| paul@113 | 609 | |
| paul@113 | 610 | # Names and attributes are assigned the entire expression. |
| paul@113 | 611 | |
| paul@113 | 612 | if isinstance(n, compiler.ast.AssName): |
| paul@113 | 613 | name_ref = self.process_name_node(n, self.process_structure_node(expr)) |
| paul@113 | 614 | self.statement(name_ref) |
| paul@113 | 615 | |
| paul@238 | 616 | # Employ guards after assignments if required. |
| paul@238 | 617 | |
| paul@238 | 618 | if expr and name_ref.is_name(): |
| paul@238 | 619 | self.generate_guard(name_ref.name) |
| paul@238 | 620 | |
| paul@113 | 621 | elif isinstance(n, compiler.ast.AssAttr): |
| paul@124 | 622 | in_assignment = self.in_assignment |
| paul@124 | 623 | self.in_assignment = self.process_structure_node(expr) |
| paul@124 | 624 | self.statement(self.process_attribute_access(n)) |
| paul@124 | 625 | self.in_assignment = in_assignment |
| paul@113 | 626 | |
| paul@113 | 627 | # Lists and tuples are matched against the expression and their |
| paul@113 | 628 | # items assigned to expression items. |
| paul@113 | 629 | |
| paul@113 | 630 | elif isinstance(n, (compiler.ast.AssList, compiler.ast.AssTuple)): |
| paul@113 | 631 | self.process_assignment_node_items(n, expr) |
| paul@113 | 632 | |
| paul@113 | 633 | # Slices and subscripts are permitted within assignment nodes. |
| paul@113 | 634 | |
| paul@113 | 635 | elif isinstance(n, compiler.ast.Slice): |
| paul@113 | 636 | self.statement(self.process_slice_node(n, expr)) |
| paul@113 | 637 | |
| paul@113 | 638 | elif isinstance(n, compiler.ast.Subscript): |
| paul@113 | 639 | self.statement(self.process_subscript_node(n, expr)) |
| paul@113 | 640 | |
| paul@124 | 641 | def process_attribute_access(self, n): |
| paul@113 | 642 | |
| paul@113 | 643 | """ |
| paul@113 | 644 | Process the given attribute access node 'n'. |
| paul@113 | 645 | |
| paul@113 | 646 | Where a name is provided, a single access should be recorded |
| paul@113 | 647 | involving potentially many attributes, thus providing a path to an |
| paul@113 | 648 | object. The remaining attributes are then accessed dynamically. |
| paul@113 | 649 | The remaining accesses could be deduced and computed, but they would |
| paul@113 | 650 | also need to be tested. |
| paul@113 | 651 | |
| paul@113 | 652 | Where no name is provided, potentially many accesses should be |
| paul@113 | 653 | recorded, one per attribute name. These could be used to provide |
| paul@113 | 654 | computed accesses, but the accessors would need to be tested in each |
| paul@113 | 655 | case. |
| paul@113 | 656 | """ |
| paul@113 | 657 | |
| paul@113 | 658 | # Obtain any completed chain and return the reference to it. |
| paul@113 | 659 | |
| paul@113 | 660 | attr_expr = self.process_attribute_chain(n) |
| paul@113 | 661 | if self.have_access_expression(n): |
| paul@113 | 662 | return attr_expr |
| paul@113 | 663 | |
| paul@113 | 664 | # Where the start of the chain of attributes has been reached, process |
| paul@113 | 665 | # the complete access. |
| paul@113 | 666 | |
| paul@113 | 667 | name_ref = attr_expr and attr_expr.is_name() and attr_expr |
| paul@152 | 668 | name = name_ref and self.get_name_for_tracking(name_ref.name, name_ref and name_ref.final()) or None |
| paul@113 | 669 | |
| paul@113 | 670 | location = self.get_access_location(name) |
| paul@113 | 671 | refs = self.get_referenced_attributes(location) |
| paul@113 | 672 | |
| paul@113 | 673 | # Generate access instructions. |
| paul@113 | 674 | |
| paul@113 | 675 | subs = { |
| paul@113 | 676 | "<expr>" : str(attr_expr), |
| paul@124 | 677 | "<assexpr>" : str(self.in_assignment), |
| paul@113 | 678 | "<context>" : "__tmp_context", |
| paul@113 | 679 | "<accessor>" : "__tmp_value", |
| paul@113 | 680 | } |
| paul@113 | 681 | |
| paul@113 | 682 | output = [] |
| paul@113 | 683 | |
| paul@113 | 684 | for instruction in self.optimiser.access_instructions[location]: |
| paul@113 | 685 | output.append(encode_access_instruction(instruction, subs)) |
| paul@113 | 686 | |
| paul@128 | 687 | if len(output) == 1: |
| paul@128 | 688 | out = output[0] |
| paul@128 | 689 | else: |
| paul@128 | 690 | out = "(\n%s\n)" % ",\n".join(output) |
| paul@113 | 691 | |
| paul@113 | 692 | del self.attrs[0] |
| paul@234 | 693 | return AttrResult(out, refs, self.get_accessor_kinds(location)) |
| paul@113 | 694 | |
| paul@113 | 695 | def get_referenced_attributes(self, location): |
| paul@113 | 696 | |
| paul@113 | 697 | """ |
| paul@113 | 698 | Convert 'location' to the form used by the deducer and retrieve any |
| paul@113 | 699 | identified attribute. |
| paul@113 | 700 | """ |
| paul@113 | 701 | |
| paul@113 | 702 | access_location = self.deducer.const_accesses.get(location) |
| paul@113 | 703 | refs = [] |
| paul@113 | 704 | for attrtype, objpath, attr in self.deducer.referenced_attrs[access_location or location]: |
| paul@113 | 705 | refs.append(attr) |
| paul@113 | 706 | return refs |
| paul@113 | 707 | |
| paul@234 | 708 | def get_accessor_kinds(self, location): |
| paul@234 | 709 | |
| paul@234 | 710 | "Return the accessor kinds for 'location'." |
| paul@234 | 711 | |
| paul@234 | 712 | return self.optimiser.accessor_kinds[location] |
| paul@234 | 713 | |
| paul@113 | 714 | def get_access_location(self, name): |
| paul@113 | 715 | |
| paul@113 | 716 | """ |
| paul@113 | 717 | Using the current namespace and the given 'name', return the access |
| paul@113 | 718 | location. |
| paul@113 | 719 | """ |
| paul@113 | 720 | |
| paul@113 | 721 | path = self.get_path_for_access() |
| paul@113 | 722 | |
| paul@113 | 723 | # Get the location used by the deducer and optimiser and find any |
| paul@113 | 724 | # recorded access. |
| paul@113 | 725 | |
| paul@113 | 726 | attrnames = ".".join(self.attrs) |
| paul@113 | 727 | access_number = self.get_access_number(path, name, attrnames) |
| paul@113 | 728 | self.update_access_number(path, name, attrnames) |
| paul@113 | 729 | return (path, name, attrnames, access_number) |
| paul@113 | 730 | |
| paul@113 | 731 | def get_access_number(self, path, name, attrnames): |
| paul@113 | 732 | access = name, attrnames |
| paul@113 | 733 | if self.attr_accesses.has_key(path) and self.attr_accesses[path].has_key(access): |
| paul@113 | 734 | return self.attr_accesses[path][access] |
| paul@113 | 735 | else: |
| paul@113 | 736 | return 0 |
| paul@113 | 737 | |
| paul@113 | 738 | def update_access_number(self, path, name, attrnames): |
| paul@113 | 739 | access = name, attrnames |
| paul@113 | 740 | if name: |
| paul@113 | 741 | init_item(self.attr_accesses, path, dict) |
| paul@144 | 742 | init_item(self.attr_accesses[path], access, lambda: 0) |
| paul@144 | 743 | self.attr_accesses[path][access] += 1 |
| paul@113 | 744 | |
| paul@237 | 745 | def get_accessor_location(self, name): |
| paul@237 | 746 | |
| paul@237 | 747 | """ |
| paul@237 | 748 | Using the current namespace and the given 'name', return the accessor |
| paul@237 | 749 | location. |
| paul@237 | 750 | """ |
| paul@237 | 751 | |
| paul@237 | 752 | path = self.get_path_for_access() |
| paul@237 | 753 | |
| paul@237 | 754 | # Get the location used by the deducer and optimiser and find any |
| paul@237 | 755 | # recorded accessor. |
| paul@237 | 756 | |
| paul@237 | 757 | access_number = self.get_accessor_number(path, name) |
| paul@237 | 758 | self.update_accessor_number(path, name) |
| paul@237 | 759 | return (path, name, None, access_number) |
| paul@237 | 760 | |
| paul@237 | 761 | def get_accessor_number(self, path, name): |
| paul@237 | 762 | if self.attr_accessors.has_key(path) and self.attr_accessors[path].has_key(name): |
| paul@237 | 763 | return self.attr_accessors[path][name] |
| paul@237 | 764 | else: |
| paul@237 | 765 | return 0 |
| paul@237 | 766 | |
| paul@237 | 767 | def update_accessor_number(self, path, name): |
| paul@237 | 768 | if name: |
| paul@237 | 769 | init_item(self.attr_accessors, path, dict) |
| paul@237 | 770 | init_item(self.attr_accessors[path], name, lambda: 0) |
| paul@237 | 771 | self.attr_accessors[path][name] += 1 |
| paul@237 | 772 | |
| paul@113 | 773 | def process_class_node(self, n): |
| paul@113 | 774 | |
| paul@113 | 775 | "Process the given class node 'n'." |
| paul@113 | 776 | |
| paul@320 | 777 | class_name = self.get_object_path(n.name) |
| paul@320 | 778 | |
| paul@320 | 779 | # Where a class is set conditionally or where the name may refer to |
| paul@320 | 780 | # different values, assign the name. |
| paul@320 | 781 | |
| paul@320 | 782 | ref = self.importer.identify(class_name) |
| paul@320 | 783 | |
| paul@320 | 784 | if not ref.static(): |
| paul@320 | 785 | self.process_assignment_for_object( |
| paul@320 | 786 | n.name, make_expression("((__attr) {0, &%s})" % |
| paul@320 | 787 | encode_path(class_name))) |
| paul@320 | 788 | |
| paul@113 | 789 | self.enter_namespace(n.name) |
| paul@113 | 790 | |
| paul@113 | 791 | if self.have_object(): |
| paul@113 | 792 | self.write_comment("Class: %s" % class_name) |
| paul@113 | 793 | |
| paul@257 | 794 | self.initialise_inherited_members(class_name) |
| paul@257 | 795 | |
| paul@113 | 796 | self.process_structure(n) |
| paul@257 | 797 | self.write_comment("End class: %s" % class_name) |
| paul@113 | 798 | |
| paul@113 | 799 | self.exit_namespace() |
| paul@113 | 800 | |
| paul@257 | 801 | def initialise_inherited_members(self, class_name): |
| paul@257 | 802 | |
| paul@257 | 803 | "Initialise members of 'class_name' inherited from its ancestors." |
| paul@257 | 804 | |
| paul@257 | 805 | for name, path in self.importer.all_class_attrs[class_name].items(): |
| paul@257 | 806 | target = "%s.%s" % (class_name, name) |
| paul@257 | 807 | |
| paul@257 | 808 | # Ignore attributes with definitions. |
| paul@257 | 809 | |
| paul@257 | 810 | ref = self.importer.identify(target) |
| paul@257 | 811 | if ref: |
| paul@257 | 812 | continue |
| paul@257 | 813 | |
| paul@320 | 814 | # Ignore special type attributes. |
| paul@320 | 815 | |
| paul@320 | 816 | if is_type_attribute(name): |
| paul@320 | 817 | continue |
| paul@320 | 818 | |
| paul@257 | 819 | # Reference inherited attributes. |
| paul@257 | 820 | |
| paul@257 | 821 | ref = self.importer.identify(path) |
| paul@257 | 822 | if ref and not ref.static(): |
| paul@257 | 823 | parent, attrname = path.rsplit(".", 1) |
| paul@257 | 824 | |
| paul@257 | 825 | self.writestmt("__store_via_object(&%s, %s, __load_via_object(&%s, %s));" % ( |
| paul@257 | 826 | encode_path(class_name), encode_symbol("pos", name), |
| paul@257 | 827 | encode_path(parent), encode_symbol("pos", attrname) |
| paul@257 | 828 | )) |
| paul@257 | 829 | |
| paul@314 | 830 | def process_from_node(self, n): |
| paul@314 | 831 | |
| paul@314 | 832 | "Process the given node 'n', importing from another module." |
| paul@314 | 833 | |
| paul@314 | 834 | path = self.get_namespace_path() |
| paul@314 | 835 | |
| paul@314 | 836 | # Attempt to obtain the referenced objects. |
| paul@314 | 837 | |
| paul@314 | 838 | for name, alias in n.names: |
| paul@314 | 839 | if name == "*": |
| paul@314 | 840 | raise InspectError("Only explicitly specified names can be imported from modules.", path, n) |
| paul@314 | 841 | |
| paul@314 | 842 | # Obtain the path of the assigned name. |
| paul@314 | 843 | |
| paul@314 | 844 | objpath = self.get_object_path(alias or name) |
| paul@314 | 845 | |
| paul@314 | 846 | # Obtain the identity of the name. |
| paul@314 | 847 | |
| paul@314 | 848 | ref = self.importer.identify(objpath) |
| paul@314 | 849 | |
| paul@314 | 850 | # Where the name is not static, assign the value. |
| paul@314 | 851 | |
| paul@314 | 852 | if ref and not ref.static() and ref.get_name(): |
| paul@314 | 853 | self.writestmt("%s;" % |
| paul@314 | 854 | TrResolvedNameRef(alias or name, Reference("<var>", None, objpath), |
| paul@314 | 855 | expr=TrResolvedNameRef(name, ref))) |
| paul@314 | 856 | |
| paul@113 | 857 | def process_function_body_node(self, n): |
| paul@113 | 858 | |
| paul@113 | 859 | """ |
| paul@113 | 860 | Process the given function, lambda, if expression or list comprehension |
| paul@113 | 861 | node 'n', generating the body. |
| paul@113 | 862 | """ |
| paul@113 | 863 | |
| paul@113 | 864 | function_name = self.get_namespace_path() |
| paul@113 | 865 | self.start_function(function_name) |
| paul@113 | 866 | |
| paul@113 | 867 | # Process the function body. |
| paul@113 | 868 | |
| paul@113 | 869 | in_conditional = self.in_conditional |
| paul@113 | 870 | self.in_conditional = False |
| paul@192 | 871 | self.function_target = 0 |
| paul@113 | 872 | |
| paul@237 | 873 | # Process any guards defined for the parameters. |
| paul@237 | 874 | |
| paul@237 | 875 | for name in self.importer.function_parameters.get(function_name): |
| paul@238 | 876 | self.generate_guard(name) |
| paul@237 | 877 | |
| paul@237 | 878 | # Produce the body and any additional return statement. |
| paul@237 | 879 | |
| paul@144 | 880 | expr = self.process_structure_node(n.code) or PredefinedConstantRef("None") |
| paul@144 | 881 | if not isinstance(expr, ReturnRef): |
| paul@128 | 882 | self.writestmt("return %s;" % expr) |
| paul@113 | 883 | |
| paul@113 | 884 | self.in_conditional = in_conditional |
| paul@113 | 885 | |
| paul@144 | 886 | self.end_function(function_name) |
| paul@113 | 887 | |
| paul@238 | 888 | def generate_guard(self, name): |
| paul@238 | 889 | |
| paul@238 | 890 | """ |
| paul@238 | 891 | Get the accessor details for 'name', found in the current namespace, and |
| paul@238 | 892 | generate any guards defined for it. |
| paul@238 | 893 | """ |
| paul@238 | 894 | |
| paul@238 | 895 | # Obtain the location, keeping track of assignment versions. |
| paul@238 | 896 | |
| paul@238 | 897 | location = self.get_accessor_location(name) |
| paul@238 | 898 | test = self.deducer.accessor_guard_tests.get(location) |
| paul@238 | 899 | |
| paul@238 | 900 | # Generate any guard from the deduced information. |
| paul@238 | 901 | |
| paul@238 | 902 | if test: |
| paul@238 | 903 | guard, guard_type = test |
| paul@238 | 904 | |
| paul@238 | 905 | if guard == "specific": |
| paul@238 | 906 | ref = first(self.deducer.accessor_all_types[location]) |
| paul@238 | 907 | argstr = "&%s" % encode_path(ref.get_origin()) |
| paul@238 | 908 | elif guard == "common": |
| paul@238 | 909 | ref = first(self.deducer.accessor_all_general_types[location]) |
| paul@238 | 910 | typeattr = encode_type_attribute(ref.get_origin()) |
| paul@238 | 911 | argstr = "%s, %s" % (encode_symbol("pos", typeattr), encode_symbol("code", typeattr)) |
| paul@238 | 912 | else: |
| paul@238 | 913 | return |
| paul@238 | 914 | |
| paul@257 | 915 | # Produce an appropriate access to an attribute's value. |
| paul@257 | 916 | |
| paul@257 | 917 | parameters = self.importer.function_parameters.get(self.get_namespace_path()) |
| paul@257 | 918 | if parameters and name in parameters: |
| paul@257 | 919 | name_to_value = "%s->value" % name |
| paul@257 | 920 | else: |
| paul@257 | 921 | name_to_value = "%s.value" % name |
| paul@257 | 922 | |
| paul@238 | 923 | # Write a test that raises a TypeError upon failure. |
| paul@238 | 924 | |
| paul@257 | 925 | self.writestmt("if (!__test_%s_%s(%s, %s)) __raise_type_error();" % ( |
| paul@257 | 926 | guard, guard_type, name_to_value, argstr)) |
| paul@238 | 927 | |
| paul@113 | 928 | def process_function_node(self, n): |
| paul@113 | 929 | |
| paul@113 | 930 | """ |
| paul@113 | 931 | Process the given function, lambda, if expression or list comprehension |
| paul@113 | 932 | node 'n', generating any initialisation statements. |
| paul@113 | 933 | """ |
| paul@113 | 934 | |
| paul@113 | 935 | # Where a function is declared conditionally, use a separate name for |
| paul@113 | 936 | # the definition, and assign the definition to the stated name. |
| paul@113 | 937 | |
| paul@196 | 938 | original_name = n.name |
| paul@196 | 939 | |
| paul@113 | 940 | if self.in_conditional or self.in_function: |
| paul@113 | 941 | name = self.get_lambda_name() |
| paul@113 | 942 | else: |
| paul@113 | 943 | name = n.name |
| paul@113 | 944 | |
| paul@196 | 945 | objpath = self.get_object_path(name) |
| paul@196 | 946 | |
| paul@113 | 947 | # Obtain details of the defaults. |
| paul@113 | 948 | |
| paul@285 | 949 | defaults = self.process_function_defaults(n, name, objpath) |
| paul@113 | 950 | if defaults: |
| paul@113 | 951 | for default in defaults: |
| paul@113 | 952 | self.writeline("%s;" % default) |
| paul@113 | 953 | |
| paul@196 | 954 | # Where a function is set conditionally or where the name may refer to |
| paul@196 | 955 | # different values, assign the name. |
| paul@196 | 956 | |
| paul@196 | 957 | ref = self.importer.identify(objpath) |
| paul@113 | 958 | |
| paul@196 | 959 | if self.in_conditional or self.in_function: |
| paul@320 | 960 | self.process_assignment_for_object(original_name, compiler.ast.Name(name)) |
| paul@196 | 961 | elif not ref.static(): |
| paul@267 | 962 | context = self.is_method(objpath) |
| paul@267 | 963 | |
| paul@320 | 964 | self.process_assignment_for_object(original_name, |
| paul@267 | 965 | make_expression("((__attr) {%s, &%s})" % ( |
| paul@267 | 966 | context and "&%s" % encode_path(context) or "0", |
| paul@267 | 967 | encode_path(objpath)))) |
| paul@113 | 968 | |
| paul@285 | 969 | def process_function_defaults(self, n, name, objpath, instance_name=None): |
| paul@113 | 970 | |
| paul@113 | 971 | """ |
| paul@113 | 972 | Process the given function or lambda node 'n', initialising defaults |
| paul@113 | 973 | that are dynamically set. The given 'name' indicates the name of the |
| paul@285 | 974 | function. The given 'objpath' indicates the origin of the function. |
| paul@285 | 975 | The given 'instance_name' indicates the name of any separate instance |
| paul@285 | 976 | of the function created to hold the defaults. |
| paul@113 | 977 | |
| paul@113 | 978 | Return a list of operations setting defaults on a function instance. |
| paul@113 | 979 | """ |
| paul@113 | 980 | |
| paul@113 | 981 | function_name = self.get_object_path(name) |
| paul@113 | 982 | function_defaults = self.importer.function_defaults.get(function_name) |
| paul@113 | 983 | if not function_defaults: |
| paul@113 | 984 | return None |
| paul@113 | 985 | |
| paul@113 | 986 | # Determine whether any unidentified defaults are involved. |
| paul@113 | 987 | |
| paul@285 | 988 | for argname, default in function_defaults: |
| paul@285 | 989 | if not default.static(): |
| paul@285 | 990 | break |
| paul@285 | 991 | else: |
| paul@113 | 992 | return None |
| paul@113 | 993 | |
| paul@285 | 994 | # Handle bound methods. |
| paul@285 | 995 | |
| paul@285 | 996 | if not instance_name: |
| paul@285 | 997 | if self.is_method(objpath): |
| paul@285 | 998 | instance_name = "&%s" % encode_bound_reference(objpath) |
| paul@285 | 999 | else: |
| paul@285 | 1000 | instance_name = "&%s" % encode_path(objpath) |
| paul@285 | 1001 | |
| paul@113 | 1002 | # Where defaults are involved but cannot be identified, obtain a new |
| paul@113 | 1003 | # instance of the lambda and populate the defaults. |
| paul@113 | 1004 | |
| paul@113 | 1005 | defaults = [] |
| paul@113 | 1006 | |
| paul@113 | 1007 | # Join the original defaults with the inspected defaults. |
| paul@113 | 1008 | |
| paul@113 | 1009 | original_defaults = [(argname, default) for (argname, default) in compiler.ast.get_defaults(n) if default] |
| paul@113 | 1010 | |
| paul@113 | 1011 | for i, (original, inspected) in enumerate(map(None, original_defaults, function_defaults)): |
| paul@113 | 1012 | |
| paul@113 | 1013 | # Obtain any reference for the default. |
| paul@113 | 1014 | |
| paul@113 | 1015 | if original: |
| paul@113 | 1016 | argname, default = original |
| paul@113 | 1017 | name_ref = self.process_structure_node(default) |
| paul@113 | 1018 | elif inspected: |
| paul@113 | 1019 | argname, default = inspected |
| paul@113 | 1020 | name_ref = TrResolvedNameRef(argname, default) |
| paul@113 | 1021 | else: |
| paul@113 | 1022 | continue |
| paul@113 | 1023 | |
| paul@338 | 1024 | # Generate default initialisers except when constants are employed. |
| paul@338 | 1025 | # Constants should be used when populating the function structures. |
| paul@338 | 1026 | |
| paul@338 | 1027 | if name_ref and not isinstance(name_ref, TrConstantValueRef): |
| paul@285 | 1028 | defaults.append("__SETDEFAULT(%s, %s, %s)" % (instance_name, i, name_ref)) |
| paul@113 | 1029 | |
| paul@113 | 1030 | return defaults |
| paul@113 | 1031 | |
| paul@113 | 1032 | def process_if_node(self, n): |
| paul@113 | 1033 | |
| paul@113 | 1034 | """ |
| paul@113 | 1035 | Process the given "if" node 'n'. |
| paul@113 | 1036 | """ |
| paul@113 | 1037 | |
| paul@113 | 1038 | first = True |
| paul@113 | 1039 | for test, body in n.tests: |
| paul@113 | 1040 | test_ref = self.process_structure_node(test) |
| paul@113 | 1041 | self.start_if(first, test_ref) |
| paul@113 | 1042 | |
| paul@113 | 1043 | in_conditional = self.in_conditional |
| paul@113 | 1044 | self.in_conditional = True |
| paul@113 | 1045 | self.process_structure_node(body) |
| paul@113 | 1046 | self.in_conditional = in_conditional |
| paul@113 | 1047 | |
| paul@113 | 1048 | self.end_if() |
| paul@113 | 1049 | first = False |
| paul@113 | 1050 | |
| paul@113 | 1051 | if n.else_: |
| paul@113 | 1052 | self.start_else() |
| paul@113 | 1053 | self.process_structure_node(n.else_) |
| paul@113 | 1054 | self.end_else() |
| paul@113 | 1055 | |
| paul@113 | 1056 | def process_invocation_node(self, n): |
| paul@113 | 1057 | |
| paul@113 | 1058 | "Process the given invocation node 'n'." |
| paul@113 | 1059 | |
| paul@113 | 1060 | expr = self.process_structure_node(n.node) |
| paul@113 | 1061 | objpath = expr.get_origin() |
| paul@118 | 1062 | target = None |
| paul@242 | 1063 | function = None |
| paul@317 | 1064 | instantiation = False |
| paul@159 | 1065 | literal_instantiation = False |
| paul@312 | 1066 | context_required = True |
| paul@113 | 1067 | |
| paul@113 | 1068 | # Obtain details of the callable. |
| paul@113 | 1069 | |
| paul@159 | 1070 | # Literals may be instantiated specially. |
| paul@159 | 1071 | |
| paul@159 | 1072 | if expr.is_name() and expr.name.startswith("$L") and objpath: |
| paul@317 | 1073 | instantiation = literal_instantiation = objpath |
| paul@159 | 1074 | parameters = None |
| paul@159 | 1075 | target = encode_literal_instantiator(objpath) |
| paul@312 | 1076 | context_required = False |
| paul@159 | 1077 | |
| paul@159 | 1078 | # Identified targets employ function pointers directly. |
| paul@159 | 1079 | |
| paul@159 | 1080 | elif objpath: |
| paul@113 | 1081 | parameters = self.importer.function_parameters.get(objpath) |
| paul@234 | 1082 | |
| paul@234 | 1083 | # Class invocation involves instantiators. |
| paul@234 | 1084 | |
| paul@118 | 1085 | if expr.has_kind("<class>"): |
| paul@317 | 1086 | instantiation = objpath |
| paul@118 | 1087 | target = encode_instantiator_pointer(objpath) |
| paul@285 | 1088 | target_structure = "&%s" % encode_bound_reference("%s.__init__" % objpath) |
| paul@312 | 1089 | context_required = False |
| paul@234 | 1090 | |
| paul@234 | 1091 | # Only plain functions and bound methods employ function pointers. |
| paul@234 | 1092 | |
| paul@118 | 1093 | elif expr.has_kind("<function>"): |
| paul@242 | 1094 | function = objpath |
| paul@234 | 1095 | |
| paul@234 | 1096 | # Test for functions and methods. |
| paul@234 | 1097 | |
| paul@312 | 1098 | method_class = self.is_method(objpath) |
| paul@234 | 1099 | accessor_kinds = expr.get_accessor_kinds() |
| paul@312 | 1100 | instance_accessor = accessor_kinds and \ |
| paul@312 | 1101 | len(accessor_kinds) == 1 and \ |
| paul@312 | 1102 | first(accessor_kinds) == "<instance>" |
| paul@234 | 1103 | |
| paul@312 | 1104 | if not method_class or instance_accessor: |
| paul@234 | 1105 | target = encode_function_pointer(objpath) |
| paul@285 | 1106 | target_structure = self.is_method(objpath) and \ |
| paul@285 | 1107 | encode_bound_reference(objpath) or \ |
| paul@285 | 1108 | "&%s" % encode_path(objpath) |
| paul@159 | 1109 | |
| paul@312 | 1110 | if not method_class: |
| paul@312 | 1111 | context_required = False |
| paul@312 | 1112 | |
| paul@159 | 1113 | # Other targets are retrieved at run-time. |
| paul@159 | 1114 | |
| paul@113 | 1115 | else: |
| paul@113 | 1116 | parameters = None |
| paul@113 | 1117 | |
| paul@122 | 1118 | # Arguments are presented in a temporary frame array with any context |
| paul@312 | 1119 | # always being the first argument. Where it would be unused, it may be |
| paul@312 | 1120 | # set to null. |
| paul@122 | 1121 | |
| paul@312 | 1122 | if context_required: |
| paul@312 | 1123 | args = ["__CONTEXT_AS_VALUE(__tmp_targets[%d])" % self.function_target] |
| paul@312 | 1124 | else: |
| paul@312 | 1125 | args = ["(__attr) {0, 0}"] |
| paul@312 | 1126 | |
| paul@122 | 1127 | args += [None] * (not parameters and len(n.args) or parameters and len(parameters) or 0) |
| paul@122 | 1128 | kwcodes = [] |
| paul@122 | 1129 | kwargs = [] |
| paul@122 | 1130 | |
| paul@192 | 1131 | # Any invocations in the arguments will store target details in a |
| paul@192 | 1132 | # different location. |
| paul@192 | 1133 | |
| paul@192 | 1134 | self.function_target += 1 |
| paul@192 | 1135 | |
| paul@122 | 1136 | for i, arg in enumerate(n.args): |
| paul@122 | 1137 | argexpr = self.process_structure_node(arg) |
| paul@122 | 1138 | |
| paul@122 | 1139 | # Store a keyword argument, either in the argument list or |
| paul@122 | 1140 | # in a separate keyword argument list for subsequent lookup. |
| paul@122 | 1141 | |
| paul@122 | 1142 | if isinstance(arg, compiler.ast.Keyword): |
| paul@113 | 1143 | |
| paul@122 | 1144 | # With knowledge of the target, store the keyword |
| paul@122 | 1145 | # argument directly. |
| paul@122 | 1146 | |
| paul@122 | 1147 | if parameters: |
| paul@122 | 1148 | argnum = parameters.index(arg.name) |
| paul@122 | 1149 | args[argnum+1] = str(argexpr) |
| paul@122 | 1150 | |
| paul@122 | 1151 | # Otherwise, store the details in a separate collection. |
| paul@122 | 1152 | |
| paul@122 | 1153 | else: |
| paul@122 | 1154 | kwargs.append(str(argexpr)) |
| paul@122 | 1155 | kwcodes.append("{%s, %s}" % ( |
| paul@122 | 1156 | encode_symbol("ppos", arg.name), |
| paul@122 | 1157 | encode_symbol("pcode", arg.name))) |
| paul@122 | 1158 | |
| paul@312 | 1159 | # Store non-keyword arguments in the argument list, rejecting |
| paul@312 | 1160 | # superfluous arguments. |
| paul@312 | 1161 | |
| paul@122 | 1162 | else: |
| paul@225 | 1163 | try: |
| paul@225 | 1164 | args[i+1] = str(argexpr) |
| paul@225 | 1165 | except IndexError: |
| paul@225 | 1166 | raise TranslateError("Too many arguments specified.", |
| paul@225 | 1167 | self.get_namespace_path(), n) |
| paul@113 | 1168 | |
| paul@192 | 1169 | # Reference the current target again. |
| paul@192 | 1170 | |
| paul@192 | 1171 | self.function_target -= 1 |
| paul@192 | 1172 | |
| paul@113 | 1173 | # Defaults are added to the frame where arguments are missing. |
| paul@113 | 1174 | |
| paul@122 | 1175 | if parameters: |
| paul@122 | 1176 | function_defaults = self.importer.function_defaults.get(objpath) |
| paul@122 | 1177 | if function_defaults: |
| paul@122 | 1178 | |
| paul@122 | 1179 | # Visit each default and set any missing arguments. |
| paul@149 | 1180 | # Use the target structure to obtain defaults, as opposed to the |
| paul@149 | 1181 | # actual function involved. |
| paul@122 | 1182 | |
| paul@122 | 1183 | for i, (argname, default) in enumerate(function_defaults): |
| paul@122 | 1184 | argnum = parameters.index(argname) |
| paul@122 | 1185 | if not args[argnum+1]: |
| paul@285 | 1186 | args[argnum+1] = "__GETDEFAULT(%s, %d)" % (target_structure, i) |
| paul@149 | 1187 | |
| paul@173 | 1188 | # Test for missing arguments. |
| paul@173 | 1189 | |
| paul@173 | 1190 | if None in args: |
| paul@173 | 1191 | raise TranslateError("Not all arguments supplied.", |
| paul@173 | 1192 | self.get_namespace_path(), n) |
| paul@173 | 1193 | |
| paul@149 | 1194 | # Encode the arguments. |
| paul@122 | 1195 | |
| paul@122 | 1196 | argstr = "__ARGS(%s)" % ", ".join(args) |
| paul@122 | 1197 | kwargstr = kwargs and ("__ARGS(%s)" % ", ".join(kwargs)) or "0" |
| paul@122 | 1198 | kwcodestr = kwcodes and ("__KWARGS(%s)" % ", ".join(kwcodes)) or "0" |
| paul@122 | 1199 | |
| paul@159 | 1200 | # Where literal instantiation is occurring, add an argument indicating |
| paul@159 | 1201 | # the number of values. |
| paul@159 | 1202 | |
| paul@159 | 1203 | if literal_instantiation: |
| paul@159 | 1204 | argstr += ", %d" % (len(args) - 1) |
| paul@159 | 1205 | |
| paul@156 | 1206 | # First, the invocation expression is presented. |
| paul@113 | 1207 | |
| paul@156 | 1208 | stages = [] |
| paul@156 | 1209 | |
| paul@156 | 1210 | # Without a known specific callable, the expression provides the target. |
| paul@118 | 1211 | |
| paul@312 | 1212 | if not target or context_required: |
| paul@312 | 1213 | stages.append("__tmp_targets[%d] = %s" % (self.function_target, expr)) |
| paul@156 | 1214 | |
| paul@156 | 1215 | # Any specific callable is then obtained. |
| paul@156 | 1216 | |
| paul@163 | 1217 | if target: |
| paul@156 | 1218 | stages.append(target) |
| paul@242 | 1219 | elif function: |
| paul@244 | 1220 | stages.append("__load_via_object(__tmp_targets[%d].value, %s).fn" % ( |
| paul@244 | 1221 | self.function_target, encode_symbol("pos", "__fn__"))) |
| paul@122 | 1222 | |
| paul@122 | 1223 | # With a known target, the function is obtained directly and called. |
| paul@122 | 1224 | |
| paul@242 | 1225 | if target or function: |
| paul@136 | 1226 | output = "(\n%s\n)(%s)" % (",\n".join(stages), argstr) |
| paul@113 | 1227 | |
| paul@122 | 1228 | # With unknown targets, the generic invocation function is applied to |
| paul@122 | 1229 | # the callable and argument collections. |
| paul@113 | 1230 | |
| paul@122 | 1231 | else: |
| paul@192 | 1232 | output = "(%s, __invoke(\n__tmp_targets[%d],\n%d, %d, %s, %s,\n%d, %s\n))" % ( |
| paul@122 | 1233 | ",\n".join(stages), |
| paul@192 | 1234 | self.function_target, |
| paul@156 | 1235 | self.always_callable and 1 or 0, |
| paul@122 | 1236 | len(kwargs), kwcodestr, kwargstr, |
| paul@122 | 1237 | len(args), argstr) |
| paul@122 | 1238 | |
| paul@317 | 1239 | if instantiation: |
| paul@317 | 1240 | return TrInstanceRef(instantiation, output) |
| paul@317 | 1241 | else: |
| paul@317 | 1242 | return make_expression(output) |
| paul@113 | 1243 | |
| paul@113 | 1244 | def always_callable(self, refs): |
| paul@113 | 1245 | |
| paul@113 | 1246 | "Determine whether all 'refs' are callable." |
| paul@113 | 1247 | |
| paul@113 | 1248 | for ref in refs: |
| paul@113 | 1249 | if not ref.static(): |
| paul@113 | 1250 | return False |
| paul@113 | 1251 | else: |
| paul@113 | 1252 | origin = ref.final() |
| paul@113 | 1253 | if not self.importer.get_attribute(origin, "__fn__"): |
| paul@113 | 1254 | return False |
| paul@113 | 1255 | return True |
| paul@113 | 1256 | |
| paul@113 | 1257 | def need_default_arguments(self, objpath, nargs): |
| paul@113 | 1258 | |
| paul@113 | 1259 | """ |
| paul@113 | 1260 | Return whether any default arguments are needed when invoking the object |
| paul@113 | 1261 | given by 'objpath'. |
| paul@113 | 1262 | """ |
| paul@113 | 1263 | |
| paul@113 | 1264 | parameters = self.importer.function_parameters.get(objpath) |
| paul@113 | 1265 | return nargs < len(parameters) |
| paul@113 | 1266 | |
| paul@113 | 1267 | def process_lambda_node(self, n): |
| paul@113 | 1268 | |
| paul@113 | 1269 | "Process the given lambda node 'n'." |
| paul@113 | 1270 | |
| paul@113 | 1271 | name = self.get_lambda_name() |
| paul@113 | 1272 | function_name = self.get_object_path(name) |
| paul@113 | 1273 | |
| paul@285 | 1274 | defaults = self.process_function_defaults(n, name, function_name, "__tmp_value") |
| paul@149 | 1275 | |
| paul@149 | 1276 | # Without defaults, produce an attribute referring to the function. |
| paul@149 | 1277 | |
| paul@113 | 1278 | if not defaults: |
| paul@149 | 1279 | return make_expression("((__attr) {0, &%s})" % encode_path(function_name)) |
| paul@149 | 1280 | |
| paul@149 | 1281 | # With defaults, copy the function structure and set the defaults on the |
| paul@149 | 1282 | # copy. |
| paul@149 | 1283 | |
| paul@113 | 1284 | else: |
| paul@155 | 1285 | return make_expression("(__tmp_value = __COPY(&%s, sizeof(%s)), %s, (__attr) {0, __tmp_value})" % ( |
| paul@151 | 1286 | encode_path(function_name), |
| paul@151 | 1287 | encode_symbol("obj", function_name), |
| paul@151 | 1288 | ", ".join(defaults))) |
| paul@113 | 1289 | |
| paul@113 | 1290 | def process_logical_node(self, n): |
| paul@113 | 1291 | |
| paul@141 | 1292 | """ |
| paul@141 | 1293 | Process the given operator node 'n'. |
| paul@141 | 1294 | |
| paul@141 | 1295 | Convert ... to ... |
| paul@141 | 1296 | |
| paul@141 | 1297 | <a> and <b> |
| paul@141 | 1298 | (__tmp_result = <a>, !__BOOL(__tmp_result)) ? __tmp_result : <b> |
| paul@141 | 1299 | |
| paul@141 | 1300 | <a> or <b> |
| paul@141 | 1301 | (__tmp_result = <a>, __BOOL(__tmp_result)) ? __tmp_result : <b> |
| paul@141 | 1302 | """ |
| paul@113 | 1303 | |
| paul@113 | 1304 | if isinstance(n, compiler.ast.And): |
| paul@141 | 1305 | op = "!" |
| paul@113 | 1306 | else: |
| paul@141 | 1307 | op = "" |
| paul@141 | 1308 | |
| paul@141 | 1309 | results = [] |
| paul@113 | 1310 | |
| paul@141 | 1311 | for node in n.nodes[:-1]: |
| paul@141 | 1312 | expr = self.process_structure_node(node) |
| paul@141 | 1313 | results.append("(__tmp_result = %s, %s__BOOL(__tmp_result)) ? __tmp_result : " % (expr, op)) |
| paul@113 | 1314 | |
| paul@141 | 1315 | expr = self.process_structure_node(n.nodes[-1]) |
| paul@141 | 1316 | results.append(str(expr)) |
| paul@141 | 1317 | |
| paul@141 | 1318 | return make_expression("(%s)" % "".join(results)) |
| paul@113 | 1319 | |
| paul@113 | 1320 | def process_name_node(self, n, expr=None): |
| paul@113 | 1321 | |
| paul@113 | 1322 | "Process the given name node 'n' with the optional assignment 'expr'." |
| paul@113 | 1323 | |
| paul@113 | 1324 | # Determine whether the name refers to a static external entity. |
| paul@113 | 1325 | |
| paul@113 | 1326 | if n.name in predefined_constants: |
| paul@113 | 1327 | return PredefinedConstantRef(n.name) |
| paul@113 | 1328 | |
| paul@173 | 1329 | # Convert literal references, operator function names, and print |
| paul@173 | 1330 | # function names to references. |
| paul@113 | 1331 | |
| paul@173 | 1332 | elif n.name.startswith("$L") or n.name.startswith("$op") or \ |
| paul@173 | 1333 | n.name.startswith("$print"): |
| paul@136 | 1334 | ref = self.importer.get_module(self.name).special.get(n.name) |
| paul@113 | 1335 | return TrResolvedNameRef(n.name, ref) |
| paul@113 | 1336 | |
| paul@113 | 1337 | # Get the appropriate name for the name reference, using the same method |
| paul@113 | 1338 | # as in the inspector. |
| paul@113 | 1339 | |
| paul@250 | 1340 | path = self.get_namespace_path() |
| paul@250 | 1341 | objpath = self.get_object_path(n.name) |
| paul@250 | 1342 | |
| paul@250 | 1343 | # Determine any assigned globals. |
| paul@250 | 1344 | |
| paul@250 | 1345 | globals = self.importer.get_module(self.name).scope_globals.get(path) |
| paul@250 | 1346 | if globals and n.name in globals: |
| paul@250 | 1347 | objpath = self.get_global_path(n.name) |
| paul@113 | 1348 | |
| paul@113 | 1349 | # Get the static identity of the name. |
| paul@113 | 1350 | |
| paul@250 | 1351 | ref = self.importer.identify(objpath) |
| paul@152 | 1352 | if ref and not ref.get_name(): |
| paul@250 | 1353 | ref = ref.alias(objpath) |
| paul@113 | 1354 | |
| paul@113 | 1355 | # Obtain any resolved names for non-assignment names. |
| paul@113 | 1356 | |
| paul@113 | 1357 | if not expr and not ref and self.in_function: |
| paul@250 | 1358 | locals = self.importer.function_locals.get(path) |
| paul@113 | 1359 | ref = locals and locals.get(n.name) |
| paul@113 | 1360 | |
| paul@208 | 1361 | # Determine whether the name refers to a parameter. The generation of |
| paul@208 | 1362 | # parameter references is different from other names. |
| paul@208 | 1363 | |
| paul@250 | 1364 | parameters = self.importer.function_parameters.get(path) |
| paul@208 | 1365 | parameter = n.name == "self" and self.in_method() or \ |
| paul@208 | 1366 | parameters and n.name in parameters |
| paul@208 | 1367 | |
| paul@113 | 1368 | # Qualified names are used for resolved static references or for |
| paul@113 | 1369 | # static namespace members. The reference should be configured to return |
| paul@113 | 1370 | # such names. |
| paul@113 | 1371 | |
| paul@208 | 1372 | return TrResolvedNameRef(n.name, ref, expr=expr, parameter=parameter) |
| paul@113 | 1373 | |
| paul@113 | 1374 | def process_not_node(self, n): |
| paul@113 | 1375 | |
| paul@113 | 1376 | "Process the given operator node 'n'." |
| paul@113 | 1377 | |
| paul@144 | 1378 | return make_expression("(__BOOL(%s) ? %s : %s)" % |
| paul@149 | 1379 | (self.process_structure_node(n.expr), PredefinedConstantRef("False"), |
| paul@149 | 1380 | PredefinedConstantRef("True"))) |
| paul@144 | 1381 | |
| paul@144 | 1382 | def process_raise_node(self, n): |
| paul@144 | 1383 | |
| paul@144 | 1384 | "Process the given raise node 'n'." |
| paul@144 | 1385 | |
| paul@144 | 1386 | # NOTE: Determine which raise statement variants should be permitted. |
| paul@144 | 1387 | |
| paul@176 | 1388 | if n.expr1: |
| paul@317 | 1389 | exc = self.process_structure_node(n.expr1) |
| paul@317 | 1390 | |
| paul@317 | 1391 | # Raise instances, testing the kind at run-time if necessary and |
| paul@317 | 1392 | # instantiating any non-instance. |
| paul@317 | 1393 | |
| paul@317 | 1394 | if isinstance(exc, TrInstanceRef): |
| paul@317 | 1395 | self.writestmt("__Raise(%s);" % exc) |
| paul@317 | 1396 | else: |
| paul@317 | 1397 | self.writestmt("__Raise(__ensure_instance(%s));" % exc) |
| paul@176 | 1398 | else: |
| paul@176 | 1399 | self.writestmt("__Complete;") |
| paul@144 | 1400 | |
| paul@144 | 1401 | def process_return_node(self, n): |
| paul@144 | 1402 | |
| paul@144 | 1403 | "Process the given return node 'n'." |
| paul@144 | 1404 | |
| paul@144 | 1405 | expr = self.process_structure_node(n.value) or PredefinedConstantRef("None") |
| paul@189 | 1406 | if self.in_try_finally or self.in_try_except: |
| paul@144 | 1407 | self.writestmt("__Return(%s);" % expr) |
| paul@144 | 1408 | else: |
| paul@144 | 1409 | self.writestmt("return %s;" % expr) |
| paul@144 | 1410 | |
| paul@144 | 1411 | return ReturnRef() |
| paul@113 | 1412 | |
| paul@113 | 1413 | def process_try_node(self, n): |
| paul@113 | 1414 | |
| paul@113 | 1415 | """ |
| paul@113 | 1416 | Process the given "try...except" node 'n'. |
| paul@113 | 1417 | """ |
| paul@113 | 1418 | |
| paul@189 | 1419 | in_try_except = self.in_try_except |
| paul@189 | 1420 | self.in_try_except = True |
| paul@189 | 1421 | |
| paul@144 | 1422 | # Use macros to implement exception handling. |
| paul@113 | 1423 | |
| paul@144 | 1424 | self.writestmt("__Try") |
| paul@113 | 1425 | self.writeline("{") |
| paul@113 | 1426 | self.indent += 1 |
| paul@113 | 1427 | self.process_structure_node(n.body) |
| paul@144 | 1428 | |
| paul@144 | 1429 | # Put the else statement in another try block that handles any raised |
| paul@144 | 1430 | # exceptions and converts them to exceptions that will not be handled by |
| paul@144 | 1431 | # the main handling block. |
| paul@144 | 1432 | |
| paul@144 | 1433 | if n.else_: |
| paul@144 | 1434 | self.writestmt("__Try") |
| paul@144 | 1435 | self.writeline("{") |
| paul@144 | 1436 | self.indent += 1 |
| paul@144 | 1437 | self.process_structure_node(n.else_) |
| paul@144 | 1438 | self.indent -= 1 |
| paul@144 | 1439 | self.writeline("}") |
| paul@144 | 1440 | self.writeline("__Catch (__tmp_exc)") |
| paul@144 | 1441 | self.writeline("{") |
| paul@144 | 1442 | self.indent += 1 |
| paul@144 | 1443 | self.writeline("if (__tmp_exc.raising) __RaiseElse(__tmp_exc.arg);") |
| paul@191 | 1444 | self.writeline("else if (__tmp_exc.completing) __Throw(__tmp_exc);") |
| paul@144 | 1445 | self.indent -= 1 |
| paul@144 | 1446 | self.writeline("}") |
| paul@144 | 1447 | |
| paul@144 | 1448 | # Complete the try block and enter the finally block, if appropriate. |
| paul@144 | 1449 | |
| paul@144 | 1450 | if self.in_try_finally: |
| paul@144 | 1451 | self.writestmt("__Complete;") |
| paul@144 | 1452 | |
| paul@113 | 1453 | self.indent -= 1 |
| paul@113 | 1454 | self.writeline("}") |
| paul@113 | 1455 | |
| paul@189 | 1456 | self.in_try_except = in_try_except |
| paul@189 | 1457 | |
| paul@144 | 1458 | # Handlers are tests within a common handler block. |
| paul@144 | 1459 | |
| paul@144 | 1460 | self.writeline("__Catch (__tmp_exc)") |
| paul@144 | 1461 | self.writeline("{") |
| paul@144 | 1462 | self.indent += 1 |
| paul@144 | 1463 | |
| paul@189 | 1464 | # Introduce an if statement to handle the completion of a try block. |
| paul@189 | 1465 | |
| paul@189 | 1466 | self.process_try_completion() |
| paul@189 | 1467 | |
| paul@144 | 1468 | # Handle exceptions in else blocks converted to __RaiseElse, converting |
| paul@144 | 1469 | # them back to normal exceptions. |
| paul@144 | 1470 | |
| paul@144 | 1471 | if n.else_: |
| paul@189 | 1472 | self.writeline("else if (__tmp_exc.raising_else) __Raise(__tmp_exc.arg);") |
| paul@144 | 1473 | |
| paul@144 | 1474 | # Exception handling. |
| paul@144 | 1475 | |
| paul@113 | 1476 | for name, var, handler in n.handlers: |
| paul@144 | 1477 | |
| paul@144 | 1478 | # Test for specific exceptions. |
| paul@144 | 1479 | |
| paul@113 | 1480 | if name is not None: |
| paul@113 | 1481 | name_ref = self.process_structure_node(name) |
| paul@191 | 1482 | self.writeline("else if (__BOOL(__fn_native__isinstance((__attr[]) {{0, 0}, __tmp_exc.arg, %s})))" % name_ref) |
| paul@144 | 1483 | else: |
| paul@189 | 1484 | self.writeline("else if (1)") |
| paul@113 | 1485 | |
| paul@113 | 1486 | self.writeline("{") |
| paul@113 | 1487 | self.indent += 1 |
| paul@113 | 1488 | |
| paul@113 | 1489 | # Establish the local for the handler. |
| paul@113 | 1490 | |
| paul@113 | 1491 | if var is not None: |
| paul@261 | 1492 | self.writestmt("%s;" % self.process_name_node(var, make_expression("__tmp_exc.arg"))) |
| paul@113 | 1493 | |
| paul@113 | 1494 | if handler is not None: |
| paul@113 | 1495 | self.process_structure_node(handler) |
| paul@113 | 1496 | |
| paul@113 | 1497 | self.indent -= 1 |
| paul@113 | 1498 | self.writeline("}") |
| paul@113 | 1499 | |
| paul@144 | 1500 | # Re-raise unhandled exceptions. |
| paul@144 | 1501 | |
| paul@189 | 1502 | self.writeline("else __Throw(__tmp_exc);") |
| paul@144 | 1503 | |
| paul@144 | 1504 | # End the handler block. |
| paul@144 | 1505 | |
| paul@144 | 1506 | self.indent -= 1 |
| paul@144 | 1507 | self.writeline("}") |
| paul@113 | 1508 | |
| paul@113 | 1509 | def process_try_finally_node(self, n): |
| paul@113 | 1510 | |
| paul@113 | 1511 | """ |
| paul@113 | 1512 | Process the given "try...finally" node 'n'. |
| paul@113 | 1513 | """ |
| paul@113 | 1514 | |
| paul@144 | 1515 | in_try_finally = self.in_try_finally |
| paul@144 | 1516 | self.in_try_finally = True |
| paul@113 | 1517 | |
| paul@144 | 1518 | # Use macros to implement exception handling. |
| paul@144 | 1519 | |
| paul@144 | 1520 | self.writestmt("__Try") |
| paul@113 | 1521 | self.writeline("{") |
| paul@113 | 1522 | self.indent += 1 |
| paul@113 | 1523 | self.process_structure_node(n.body) |
| paul@113 | 1524 | self.indent -= 1 |
| paul@113 | 1525 | self.writeline("}") |
| paul@144 | 1526 | |
| paul@144 | 1527 | self.in_try_finally = in_try_finally |
| paul@144 | 1528 | |
| paul@144 | 1529 | # Finally clauses handle special exceptions. |
| paul@144 | 1530 | |
| paul@144 | 1531 | self.writeline("__Catch (__tmp_exc)") |
| paul@113 | 1532 | self.writeline("{") |
| paul@113 | 1533 | self.indent += 1 |
| paul@113 | 1534 | self.process_structure_node(n.final) |
| paul@144 | 1535 | |
| paul@189 | 1536 | # Introduce an if statement to handle the completion of a try block. |
| paul@189 | 1537 | |
| paul@189 | 1538 | self.process_try_completion() |
| paul@189 | 1539 | self.writeline("else __Throw(__tmp_exc);") |
| paul@189 | 1540 | |
| paul@189 | 1541 | self.indent -= 1 |
| paul@189 | 1542 | self.writeline("}") |
| paul@189 | 1543 | |
| paul@189 | 1544 | def process_try_completion(self): |
| paul@189 | 1545 | |
| paul@189 | 1546 | "Generate a test for the completion of a try block." |
| paul@144 | 1547 | |
| paul@144 | 1548 | self.writestmt("if (__tmp_exc.completing)") |
| paul@144 | 1549 | self.writeline("{") |
| paul@144 | 1550 | self.indent += 1 |
| paul@189 | 1551 | |
| paul@316 | 1552 | # Do not return anything at the module level. |
| paul@316 | 1553 | |
| paul@316 | 1554 | if self.get_namespace_path() != self.name: |
| paul@189 | 1555 | |
| paul@316 | 1556 | # Only use the normal return statement if no surrounding try blocks |
| paul@316 | 1557 | # apply. |
| paul@316 | 1558 | |
| paul@316 | 1559 | if not self.in_try_finally and not self.in_try_except: |
| paul@316 | 1560 | self.writeline("if (!__ISNULL(__tmp_exc.arg)) return __tmp_exc.arg;") |
| paul@316 | 1561 | else: |
| paul@316 | 1562 | self.writeline("if (!__ISNULL(__tmp_exc.arg)) __Throw(__tmp_exc);") |
| paul@144 | 1563 | |
| paul@113 | 1564 | self.indent -= 1 |
| paul@113 | 1565 | self.writeline("}") |
| paul@113 | 1566 | |
| paul@113 | 1567 | def process_while_node(self, n): |
| paul@113 | 1568 | |
| paul@113 | 1569 | "Process the given while node 'n'." |
| paul@113 | 1570 | |
| paul@113 | 1571 | self.writeline("while (1)") |
| paul@113 | 1572 | self.writeline("{") |
| paul@113 | 1573 | self.indent += 1 |
| paul@113 | 1574 | test = self.process_structure_node(n.test) |
| paul@113 | 1575 | |
| paul@113 | 1576 | # Emit the loop termination condition unless "while <true value>" is |
| paul@113 | 1577 | # indicated. |
| paul@113 | 1578 | |
| paul@113 | 1579 | if not (isinstance(test, PredefinedConstantRef) and test.value): |
| paul@113 | 1580 | |
| paul@113 | 1581 | # NOTE: This needs to evaluate whether the operand is true or false |
| paul@113 | 1582 | # NOTE: according to Python rules. |
| paul@113 | 1583 | |
| paul@144 | 1584 | self.writeline("if (!__BOOL(%s))" % test) |
| paul@113 | 1585 | self.writeline("{") |
| paul@113 | 1586 | self.indent += 1 |
| paul@113 | 1587 | if n.else_: |
| paul@113 | 1588 | self.process_structure_node(n.else_) |
| paul@128 | 1589 | self.writestmt("break;") |
| paul@113 | 1590 | self.indent -= 1 |
| paul@113 | 1591 | self.writeline("}") |
| paul@113 | 1592 | |
| paul@113 | 1593 | in_conditional = self.in_conditional |
| paul@113 | 1594 | self.in_conditional = True |
| paul@113 | 1595 | self.process_structure_node(n.body) |
| paul@113 | 1596 | self.in_conditional = in_conditional |
| paul@113 | 1597 | |
| paul@113 | 1598 | self.indent -= 1 |
| paul@113 | 1599 | self.writeline("}") |
| paul@113 | 1600 | |
| paul@113 | 1601 | # Output generation. |
| paul@113 | 1602 | |
| paul@128 | 1603 | def start_output(self): |
| paul@159 | 1604 | |
| paul@159 | 1605 | "Write the declarations at the top of each source file." |
| paul@159 | 1606 | |
| paul@128 | 1607 | print >>self.out, """\ |
| paul@128 | 1608 | #include "types.h" |
| paul@144 | 1609 | #include "exceptions.h" |
| paul@128 | 1610 | #include "ops.h" |
| paul@128 | 1611 | #include "progconsts.h" |
| paul@128 | 1612 | #include "progops.h" |
| paul@128 | 1613 | #include "progtypes.h" |
| paul@137 | 1614 | #include "main.h" |
| paul@128 | 1615 | """ |
| paul@128 | 1616 | |
| paul@113 | 1617 | def start_module(self): |
| paul@159 | 1618 | |
| paul@159 | 1619 | "Write the start of each module's main function." |
| paul@159 | 1620 | |
| paul@113 | 1621 | print >>self.out, "void __main_%s()" % encode_path(self.name) |
| paul@113 | 1622 | print >>self.out, "{" |
| paul@113 | 1623 | self.indent += 1 |
| paul@192 | 1624 | self.write_temporaries(self.importer.function_targets.get(self.name)) |
| paul@113 | 1625 | |
| paul@113 | 1626 | def end_module(self): |
| paul@159 | 1627 | |
| paul@159 | 1628 | "End each module by closing its main function." |
| paul@159 | 1629 | |
| paul@113 | 1630 | self.indent -= 1 |
| paul@144 | 1631 | print >>self.out, "}" |
| paul@113 | 1632 | |
| paul@113 | 1633 | def start_function(self, name): |
| paul@159 | 1634 | |
| paul@159 | 1635 | "Start the function having the given 'name'." |
| paul@159 | 1636 | |
| paul@113 | 1637 | print >>self.out, "__attr %s(__attr __args[])" % encode_function_pointer(name) |
| paul@113 | 1638 | print >>self.out, "{" |
| paul@113 | 1639 | self.indent += 1 |
| paul@192 | 1640 | self.write_temporaries(self.importer.function_targets.get(name)) |
| paul@113 | 1641 | |
| paul@113 | 1642 | # Obtain local names from parameters. |
| paul@113 | 1643 | |
| paul@113 | 1644 | parameters = self.importer.function_parameters[name] |
| paul@144 | 1645 | locals = self.importer.function_locals[name].keys() |
| paul@113 | 1646 | names = [] |
| paul@113 | 1647 | |
| paul@113 | 1648 | for n in locals: |
| paul@113 | 1649 | |
| paul@113 | 1650 | # Filter out special names and parameters. Note that self is a local |
| paul@113 | 1651 | # regardless of whether it originally appeared in the parameters or |
| paul@113 | 1652 | # not. |
| paul@113 | 1653 | |
| paul@113 | 1654 | if n.startswith("$l") or n in parameters or n == "self": |
| paul@113 | 1655 | continue |
| paul@113 | 1656 | names.append(encode_path(n)) |
| paul@113 | 1657 | |
| paul@113 | 1658 | # Emit required local names. |
| paul@113 | 1659 | |
| paul@113 | 1660 | if names: |
| paul@113 | 1661 | names.sort() |
| paul@113 | 1662 | self.writeline("__attr %s;" % ", ".join(names)) |
| paul@113 | 1663 | |
| paul@208 | 1664 | self.write_parameters(name) |
| paul@144 | 1665 | |
| paul@144 | 1666 | def end_function(self, name): |
| paul@159 | 1667 | |
| paul@159 | 1668 | "End the function having the given 'name'." |
| paul@159 | 1669 | |
| paul@144 | 1670 | self.indent -= 1 |
| paul@144 | 1671 | print >>self.out, "}" |
| paul@144 | 1672 | print >>self.out |
| paul@144 | 1673 | |
| paul@192 | 1674 | def write_temporaries(self, targets): |
| paul@159 | 1675 | |
| paul@192 | 1676 | """ |
| paul@192 | 1677 | Write temporary storage employed by functions, providing space for the |
| paul@192 | 1678 | given number of 'targets'. |
| paul@192 | 1679 | """ |
| paul@192 | 1680 | |
| paul@192 | 1681 | targets = targets is not None and "__tmp_targets[%d], " % targets or "" |
| paul@159 | 1682 | |
| paul@149 | 1683 | self.writeline("__ref __tmp_context, __tmp_value;") |
| paul@192 | 1684 | self.writeline("__attr %s__tmp_result;" % targets) |
| paul@149 | 1685 | self.writeline("__exc __tmp_exc;") |
| paul@149 | 1686 | |
| paul@208 | 1687 | def write_parameters(self, name): |
| paul@159 | 1688 | |
| paul@159 | 1689 | """ |
| paul@159 | 1690 | For the function having the given 'name', write definitions of |
| paul@208 | 1691 | parameters found in the arguments array. |
| paul@159 | 1692 | """ |
| paul@159 | 1693 | |
| paul@144 | 1694 | parameters = self.importer.function_parameters[name] |
| paul@144 | 1695 | |
| paul@113 | 1696 | # Generate any self reference. |
| paul@113 | 1697 | |
| paul@156 | 1698 | if self.is_method(name): |
| paul@208 | 1699 | self.writeline("__attr * const self = &__args[0];") |
| paul@113 | 1700 | |
| paul@113 | 1701 | # Generate aliases for the parameters. |
| paul@113 | 1702 | |
| paul@113 | 1703 | for i, parameter in enumerate(parameters): |
| paul@208 | 1704 | self.writeline("__attr * const %s = &__args[%d];" % (encode_path(parameter), i+1)) |
| paul@113 | 1705 | |
| paul@113 | 1706 | def start_if(self, first, test_ref): |
| paul@144 | 1707 | self.writestmt("%sif (__BOOL(%s))" % (not first and "else " or "", test_ref)) |
| paul@113 | 1708 | self.writeline("{") |
| paul@113 | 1709 | self.indent += 1 |
| paul@113 | 1710 | |
| paul@113 | 1711 | def end_if(self): |
| paul@113 | 1712 | self.indent -= 1 |
| paul@113 | 1713 | self.writeline("}") |
| paul@113 | 1714 | |
| paul@113 | 1715 | def start_else(self): |
| paul@113 | 1716 | self.writeline("else") |
| paul@113 | 1717 | self.writeline("{") |
| paul@113 | 1718 | self.indent += 1 |
| paul@113 | 1719 | |
| paul@113 | 1720 | def end_else(self): |
| paul@113 | 1721 | self.indent -= 1 |
| paul@113 | 1722 | self.writeline("}") |
| paul@113 | 1723 | |
| paul@113 | 1724 | def statement(self, expr): |
| paul@113 | 1725 | # NOTE: Should never be None. |
| paul@113 | 1726 | if not expr: |
| paul@128 | 1727 | self.writestmt("...;") |
| paul@113 | 1728 | s = str(expr) |
| paul@113 | 1729 | if s: |
| paul@128 | 1730 | self.writestmt("%s;" % s) |
| paul@113 | 1731 | |
| paul@113 | 1732 | def statements(self, results): |
| paul@113 | 1733 | for result in results: |
| paul@113 | 1734 | self.statement(result) |
| paul@113 | 1735 | |
| paul@159 | 1736 | def writeline(self, s): |
| paul@159 | 1737 | print >>self.out, "%s%s" % (self.pad(), self.indenttext(s, self.indent + 1)) |
| paul@159 | 1738 | |
| paul@159 | 1739 | def writestmt(self, s): |
| paul@159 | 1740 | print >>self.out |
| paul@159 | 1741 | self.writeline(s) |
| paul@159 | 1742 | |
| paul@159 | 1743 | def write_comment(self, s): |
| paul@159 | 1744 | self.writestmt("/* %s */" % s) |
| paul@159 | 1745 | |
| paul@113 | 1746 | def pad(self, extra=0): |
| paul@113 | 1747 | return (self.indent + extra) * self.tabstop |
| paul@113 | 1748 | |
| paul@113 | 1749 | def indenttext(self, s, levels): |
| paul@116 | 1750 | lines = s.split("\n") |
| paul@116 | 1751 | out = [lines[0]] |
| paul@116 | 1752 | for line in lines[1:]: |
| paul@116 | 1753 | out.append(levels * self.tabstop + line) |
| paul@116 | 1754 | if line.endswith("("): |
| paul@116 | 1755 | levels += 1 |
| paul@122 | 1756 | elif line.startswith(")"): |
| paul@116 | 1757 | levels -= 1 |
| paul@116 | 1758 | return "\n".join(out) |
| paul@113 | 1759 | |
| paul@113 | 1760 | # vim: tabstop=4 expandtab shiftwidth=4 |
