6 NormalVariableExpression = collections.namedtuple(
7 'NormalVariableExpression',
13 NormalIntegerLiteralExpression = collections.namedtuple(
14 'NormalIntegerLiteralExpression',
20 NormalStringLiteralExpression = collections.namedtuple(
21 'NormalStringLiteralExpression',
27 NormalSymbolExpression = collections.namedtuple(
28 'NormalSymbolExpression',
34 NormalNegationExpression = collections.namedtuple(
35 'NormalNegationExpression',
37 'internal_expression',
41 NormalInfixExpression = collections.namedtuple(
42 'NormalInfixExpression',
51 NormalFunctionCallExpression = collections.namedtuple(
52 'NormalFunctionCallExpression',
54 'function_expression',
60 NormalArrayVariableInitializationStatement = collections.namedtuple(
61 'NormalArrayVariableInitializationStatement',
68 NormalVariableInitializationStatement = collections.namedtuple(
69 'NormalVariableInitializationStatement',
76 NormalVariableReassignmentStatement = collections.namedtuple(
77 'NormalVariableReassignmentStatement',
84 NormalExpressionStatement = collections.namedtuple(
85 'NormalExpressionStatement',
91 NormalAssignmentStatement = collections.namedtuple(
92 'NormalAssignmentStatement',
99 NormalIfElseStatement = collections.namedtuple(
100 'NormalIfElseStatement',
102 'condition_expression',
104 'else_statement_list',
108 NormalFunctionDefinitionStatement = collections.namedtuple(
109 'NormalFunctionDefinitionStatement',
112 'argument_name_list',
117 NormalProgram = collections.namedtuple(
124 def fake_normalization(counter, thing):
125 return (counter, (), thing)
127 def normalize_integer_literal_expression(counter, expression):
128 variable = '${}'.format(counter)
132 NormalVariableInitializationStatement(
134 expression=NormalIntegerLiteralExpression(integer=expression.integer),
137 NormalVariableExpression(variable=variable),
140 NormalListConstructExpression = collections.namedtuple(
141 'NormalListConstructExpression',
147 NormalListAppendStatement = collections.namedtuple(
148 'NormalListAppendStatement',
155 NormalListGetExpression = collections.namedtuple(
156 'NormalListGetExpression',
163 def normalize_list_literal_expression(counter, expression):
164 list_variable = '${}'.format(counter)
168 NormalVariableInitializationStatement(
169 variable=list_variable,
170 expression=NormalListConstructExpression(allocate=len(expression.item_expression_list)),
174 list_expression = NormalVariableExpression(variable=list_variable)
176 for item_expression in expression.item_expression_list:
177 counter, item_expression_prestatements, normalized = normalize_expression(
182 for p in item_expression_prestatements:
183 prestatements.append(p)
185 prestatements.append(
186 NormalListAppendStatement(
187 list_expression=list_expression,
188 item_expression=normalized,
194 tuple(prestatements),
198 def normalize_list_item_expression(counter, expression):
199 counter, list_prestatements, list_expression = normalize_expression(counter, expression.list_expression)
200 counter, index_prestatements, index_expression = normalize_expression(counter, expression.index_expression)
202 result_variable = '${}'.format(counter)
203 result_prestatement = NormalVariableInitializationStatement(
204 variable=result_variable,
205 expression=NormalListGetExpression(
206 list_expression=list_expression,
207 index_expression=index_expression,
213 list_prestatements + index_prestatements + (result_prestatement,),
214 NormalVariableExpression(variable=result_variable),
217 def normalize_string_literal_expression(counter, expression):
218 variable = '${}'.format(counter)
222 NormalVariableInitializationStatement(
224 expression=NormalStringLiteralExpression(string=expression.string),
227 NormalVariableExpression(variable=variable),
230 def normalize_symbol_expression(counter, expression):
231 variable = '${}'.format(counter)
235 NormalVariableInitializationStatement(
237 expression=NormalSymbolExpression(symbol=expression.symbol),
240 NormalVariableExpression(variable=variable),
243 def normalize_function_call_expression(counter, expression):
244 assert isinstance(expression, parsing.FurFunctionCallExpression)
249 for argument in expression.arguments:
250 counter, argument_prestatements, normalized_argument = normalize_expression(counter, argument)
252 for s in argument_prestatements:
253 prestatements.append(s)
255 variable = '${}'.format(counter)
256 prestatements.append(
257 NormalVariableInitializationStatement(
259 expression=normalized_argument,
262 arguments.append(NormalVariableExpression(
267 arguments_variable = '${}'.format(counter)
270 prestatements.append(NormalArrayVariableInitializationStatement(
271 variable=arguments_variable,
272 items=tuple(arguments),
275 counter, function_prestatements, function_expression = normalize_expression(
280 for ps in function_prestatements:
281 prestatements.append(ps)
283 if not isinstance(function_expression, NormalVariableExpression):
284 function_variable = '${}'.format(counter)
286 prestatements.append(
287 NormalVariableInitializationStatement(
288 variable=function_variable,
289 expression=function_expression,
293 function_expression = NormalVariableExpression(variable=function_variable)
298 tuple(prestatements),
299 NormalFunctionCallExpression(
300 function_expression=function_expression,
301 argument_count=len(arguments),
302 argument_items=NormalVariableExpression(variable=arguments_variable),
306 def normalize_basic_infix_operation(counter, expression):
307 counter, left_prestatements, left_expression = normalize_expression(counter, expression.left)
308 counter, right_prestatements, right_expression = normalize_expression(counter, expression.right)
310 left_variable = '${}'.format(counter)
312 right_variable = '${}'.format(counter)
314 center_variable = '${}'.format(counter)
317 root_prestatements = (
318 NormalVariableInitializationStatement(
319 variable=left_variable,
320 expression=left_expression,
322 NormalVariableInitializationStatement(
323 variable=right_variable,
324 expression=right_expression,
326 NormalVariableInitializationStatement(
327 variable=center_variable,
328 expression=NormalInfixExpression(
329 order=expression.order,
330 operator=expression.operator,
331 left=NormalVariableExpression(variable=left_variable),
332 right=NormalVariableExpression(variable=right_variable),
339 left_prestatements + right_prestatements + root_prestatements,
340 NormalVariableExpression(variable=center_variable),
343 def normalize_comparison_expression(counter, expression):
346 while isinstance(expression.left, parsing.FurInfixExpression) and expression.order == 'comparison_level':
347 stack.append((expression.operator, expression.order, expression.right))
348 expression = expression.left
350 counter, left_prestatements, left_expression = normalize_expression(counter, expression.left)
351 counter, right_prestatements, right_expression = normalize_expression(counter, expression.right)
353 left_variable = '${}'.format(counter)
355 right_variable = '${}'.format(counter)
358 root_prestatements = (
359 NormalVariableInitializationStatement(
360 variable=left_variable,
361 expression=left_expression,
363 NormalVariableInitializationStatement(
364 variable=right_variable,
365 expression=right_expression,
369 counter, result_prestatements, result_expression = (
371 left_prestatements + right_prestatements + root_prestatements,
372 NormalInfixExpression(
373 order=expression.order,
374 operator=expression.operator,
375 left=NormalVariableExpression(variable=left_variable),
376 right=NormalVariableExpression(variable=right_variable),
380 while len(stack) > 0:
381 right_operator, right_order, right_expression = stack.pop()
382 and_right_expression = parsing.FurInfixExpression(
383 operator=right_operator,
385 left=NormalVariableExpression(variable=right_variable),
386 right=right_expression,
389 and_expression = parsing.FurInfixExpression(
392 left=result_expression,
393 right=and_right_expression,
396 counter, and_prestatements, result_expression = normalize_boolean_expression(
401 result_prestatements = result_prestatements + and_prestatements
403 return (counter, result_prestatements, result_expression)
405 def normalize_boolean_expression(counter, expression):
406 counter, left_prestatements, left_expression = normalize_expression(counter, expression.left)
407 counter, right_prestatements, right_expression = normalize_expression(counter, expression.right)
409 result_variable = '${}'.format(counter)
410 if_else_prestatment = NormalVariableInitializationStatement(
411 variable=result_variable,
412 expression=left_expression,
416 condition_expression=NormalVariableExpression(variable=result_variable)
417 short_circuited_statements = right_prestatements + (NormalVariableReassignmentStatement(variable=result_variable, expression=right_expression),)
419 if expression.operator == 'and':
420 if_else_statement = NormalIfElseStatement(
421 condition_expression=condition_expression,
422 if_statement_list=short_circuited_statements,
423 else_statement_list=(),
426 elif expression.operator == 'or':
427 if_else_statement = NormalIfElseStatement(
428 condition_expression=condition_expression,
429 if_statement_list=(),
430 else_statement_list=short_circuited_statements,
434 raise Exception('Unable to handle operator "{}"'.format(expression.operator))
438 left_prestatements + (if_else_prestatment, if_else_statement),
439 NormalVariableExpression(variable=result_variable),
443 def normalize_infix_expression(counter, expression):
445 'multiplication_level': normalize_basic_infix_operation,
446 'addition_level': normalize_basic_infix_operation,
447 'comparison_level': normalize_comparison_expression,
448 'and_level': normalize_boolean_expression,
449 'or_level': normalize_boolean_expression,
450 }[expression.order](counter, expression)
452 def normalize_if_expression(counter, expression):
453 counter, condition_prestatements, condition_expression = normalize_expression(
455 expression.condition_expression,
458 result_variable = '${}'.format(counter)
461 counter, if_statement_list = normalize_statement_list(
463 expression.if_statement_list,
464 assign_result_to=result_variable,
466 counter, else_statement_list = normalize_statement_list(
468 expression.else_statement_list,
469 assign_result_to=result_variable,
474 condition_prestatements + (
475 NormalVariableInitializationStatement(
476 variable=result_variable,
477 expression=NormalVariableExpression(variable='builtin$nil'),
479 NormalIfElseStatement(
480 condition_expression=condition_expression,
481 if_statement_list=if_statement_list,
482 else_statement_list=else_statement_list,
485 NormalVariableExpression(variable=result_variable),
488 def normalize_negation_expression(counter, expression):
489 counter, prestatements, internal_expression = normalize_expression(counter, expression.value)
491 internal_variable = '${}'.format(counter)
497 NormalVariableInitializationStatement(
498 variable=internal_variable,
499 expression=internal_expression,
502 NormalNegationExpression(internal_expression=NormalVariableExpression(variable=internal_variable)),
505 def normalize_expression(counter, expression):
507 NormalInfixExpression: fake_normalization,
508 NormalVariableExpression: fake_normalization,
509 parsing.FurFunctionCallExpression: normalize_function_call_expression,
510 parsing.FurIfExpression: normalize_if_expression,
511 parsing.FurInfixExpression: normalize_infix_expression,
512 parsing.FurIntegerLiteralExpression: normalize_integer_literal_expression,
513 parsing.FurListLiteralExpression: normalize_list_literal_expression,
514 parsing.FurListItemExpression: normalize_list_item_expression,
515 parsing.FurNegationExpression: normalize_negation_expression,
516 parsing.FurStringLiteralExpression: normalize_string_literal_expression,
517 parsing.FurSymbolExpression: normalize_symbol_expression,
518 }[type(expression)](counter, expression)
520 def normalize_expression_statement(counter, statement):
521 # TODO Normalized will be a NormalVariableExpression, which will go unused
522 # for expression statements in every case except when it's a return
523 # statement. This cases warnings on C compilation. We should only generate
524 # this variable when it will be used on return.
525 counter, prestatements, normalized = normalize_expression(counter, statement.expression)
530 NormalExpressionStatement(expression=normalized),
533 def normalize_function_definition_statement(counter, statement):
534 _, statement_list = normalize_statement_list(
536 statement.statement_list,
537 assign_result_to='result',
542 NormalFunctionDefinitionStatement(
544 argument_name_list=statement.argument_name_list,
545 statement_list=statement_list,
549 def normalize_assignment_statement(counter, statement):
550 counter, prestatements, normalized_expression = normalize_expression(counter, statement.expression)
554 NormalAssignmentStatement(
555 target=statement.target,
556 expression=normalized_expression,
560 def normalize_statement(counter, statement):
562 parsing.FurAssignmentStatement: normalize_assignment_statement,
563 parsing.FurExpressionStatement: normalize_expression_statement,
564 parsing.FurFunctionDefinitionStatement: normalize_function_definition_statement,
565 }[type(statement)](counter, statement)
567 @util.force_generator(tuple)
568 def normalize_statement_list(counter, statement_list, **kwargs):
569 assign_result_to = kwargs.pop('assign_result_to', None)
571 assert len(kwargs) == 0
573 result_statement_list = []
575 for statement in statement_list:
576 counter, prestatements, normalized = normalize_statement(counter, statement)
577 for s in prestatements:
578 result_statement_list.append(s)
579 result_statement_list.append(normalized)
581 last_statement = result_statement_list[-1]
583 if isinstance(last_statement, NormalExpressionStatement) and isinstance(last_statement.expression, NormalVariableExpression):
584 result_expression = result_statement_list.pop().expression
586 if assign_result_to is not None:
587 result_statement_list.append(
588 NormalVariableReassignmentStatement(
589 variable=assign_result_to,
590 expression=result_expression,
596 result_statement_list,
599 def normalize(program):
600 _, statement_list = normalize_statement_list(0, program.statement_list)
602 return NormalProgram(
603 statement_list=statement_list,