4 import parsing # TODO Remove this import, as we should be normalizing everything before it gets here
6 CIntegerLiteral = collections.namedtuple(
13 CStringLiteral = collections.namedtuple(
21 CVariableExpression = collections.namedtuple(
22 'CVariableExpression',
28 CSymbolExpression = collections.namedtuple(
36 CNegationExpression = collections.namedtuple(
37 'CNegationExpression',
43 CFunctionCallForFurInfixOperator = collections.namedtuple(
44 'CFunctionCallForFurInfixOperator',
52 CFunctionCallExpression = collections.namedtuple(
53 'CFunctionCallExpression',
55 'function_expression',
61 # TODO We are currently not changing variables, just preventing them from being accessed.
62 CSymbolAssignmentStatement = collections.namedtuple(
63 'CSymbolAssignmentStatement',
66 'target_symbol_list_index',
71 CArrayVariableInitializationStatement = collections.namedtuple(
72 'CArrayVariableInitializationStatement',
79 CVariableInitializationStatement = collections.namedtuple(
80 'CVariableInitializationStatement',
87 CVariableReassignmentStatement = collections.namedtuple(
88 'CVariableReassignmentStatement',
95 CExpressionStatement = collections.namedtuple(
96 'CExpressionStatement',
102 CIfElseStatement = collections.namedtuple(
105 'condition_expression',
111 CFunctionDeclaration = collections.namedtuple(
112 'CFunctionDeclaration',
118 # TODO If a function definition doesn't end with an expression, we have issues currently because we try to return statement.
119 # TODO Closures currently wrap entire defining environment, even symbols that are not used, which makes garbage collection ineffective.
120 CFunctionDefinition = collections.namedtuple(
121 'CFunctionDefinition',
124 'argument_name_list',
129 CProgram = collections.namedtuple(
133 'function_definition_list',
134 'operator_declarations',
136 'standard_libraries',
137 'string_literal_list',
145 'print': ['stdio.h'],
149 def transform_variable_expression(accumulators, expression):
150 return CVariableExpression(variable=expression.variable)
152 def transform_string_literal_expression(accumulators, expression):
153 value = expression.string
156 index = accumulators.string_literal_list.index(value)
158 index = len(accumulators.string_literal_list)
159 accumulators.string_literal_list.append(value)
161 return CStringLiteral(index=index, value=value)
163 def transform_symbol_expression(accumulators, expression):
164 if expression.symbol in BUILTINS:
165 accumulators.builtin_set.add(expression.symbol)
168 symbol_list_index = accumulators.symbol_list.index(expression.symbol)
170 symbol_list_index = len(accumulators.symbol_list)
171 accumulators.symbol_list.append(expression.symbol)
173 return CSymbolExpression(
174 symbol=expression.symbol,
175 symbol_list_index=symbol_list_index,
178 CInfixDeclaration = collections.namedtuple(
188 INFIX_OPERATOR_TO_DECLARATION = {
189 '+': CInfixDeclaration(name='add', in_type='integer', out_type='integer', operator='+'),
190 '-': CInfixDeclaration(name='subtract', in_type='integer', out_type='integer', operator='-'),
191 '*': CInfixDeclaration(name='multiply', in_type='integer', out_type='integer', operator='*'),
192 '//': CInfixDeclaration(name='integerDivide', in_type='integer', out_type='integer', operator='/'),
193 '%': CInfixDeclaration(name='modularDivide', in_type='integer', out_type='integer', operator='%'),
194 'and': CInfixDeclaration(name='and', in_type='boolean', out_type='boolean', operator='&&'),
195 'or': CInfixDeclaration(name='or', in_type='boolean', out_type='boolean', operator='||'),
196 '==': CInfixDeclaration(name='equals', in_type='integer', out_type='boolean', operator='=='),
197 '!=': CInfixDeclaration(name='notEquals', in_type='integer', out_type='boolean', operator='!='),
198 '<=': CInfixDeclaration(name='lessThanOrEqual', in_type='integer', out_type='boolean', operator='<='),
199 '>=': CInfixDeclaration(name='greaterThanOrEqual', in_type='integer', out_type='boolean', operator='>='),
200 '<': CInfixDeclaration(name='lessThan', in_type='integer', out_type='boolean', operator='<'),
201 '>': CInfixDeclaration(name='greaterThan', in_type='integer', out_type='boolean', operator='>'),
204 def transform_comparison_level_expression(accumulators, expression):
205 accumulators.operator_set.add(INFIX_OPERATOR_TO_DECLARATION[expression.operator])
207 # Transform expressions like 1 < 2 < 3 into expressions like 1 < 2 && 2 < 3
208 if isinstance(expression.left, parsing.FurInfixExpression) and expression.left.order == 'comparison_level':
209 left = transform_comparison_level_expression(
216 right = transform_expression(
221 # TODO Don't evaluate the middle expression twice
222 return CFunctionCallForFurInfixOperator(
225 right=CFunctionCallForFurInfixOperator(
226 name=INFIX_OPERATOR_TO_DECLARATION[expression.operator].name,
232 return CFunctionCallForFurInfixOperator(
233 name=INFIX_OPERATOR_TO_DECLARATION[expression.operator].name,
234 left=transform_expression(accumulators, expression.left),
235 right=transform_expression(accumulators, expression.right),
238 def transform_infix_expression(accumulators, expression):
239 if expression.order == 'comparison_level':
240 return transform_comparison_level_expression(accumulators, expression)
242 accumulators.operator_set.add(INFIX_OPERATOR_TO_DECLARATION[expression.operator])
244 return CFunctionCallForFurInfixOperator(
245 name=INFIX_OPERATOR_TO_DECLARATION[expression.operator].name,
246 left=transform_expression(accumulators, expression.left),
247 right=transform_expression(accumulators, expression.right),
250 def transform_integer_literal_expression(accumulators, expression):
251 return CIntegerLiteral(value=expression.integer)
253 def transform_negation_expression(accumulators, expression):
254 return CNegationExpression(
255 value=transform_expression(accumulators, expression.internal_expression),
258 def transform_expression(accumulators, expression):
259 # TODO Clean up handlers for parsing expressions
261 parsing.FurInfixExpression: transform_infix_expression,
262 parsing.FurIntegerLiteralExpression: transform_integer_literal_expression,
263 parsing.FurNegationExpression: transform_negation_expression,
264 parsing.FurStringLiteralExpression: transform_string_literal_expression,
265 normalization.NormalFunctionCallExpression: transform_function_call_expression,
266 normalization.NormalInfixExpression: transform_infix_expression,
267 normalization.NormalIntegerLiteralExpression: transform_integer_literal_expression,
268 normalization.NormalNegationExpression: transform_negation_expression,
269 normalization.NormalStringLiteralExpression: transform_string_literal_expression,
270 normalization.NormalSymbolExpression: transform_symbol_expression,
271 normalization.NormalVariableExpression: transform_variable_expression,
272 }[type(expression)](accumulators, expression)
274 def transform_symbol_assignment_statement(accumulators, assignment_statement):
275 # TODO Check that target is not a builtin
277 symbol_list_index = accumulators.symbol_list.index(assignment_statement.target)
279 symbol_list_index = len(accumulators.symbol_list)
280 accumulators.symbol_list.append(assignment_statement.target)
282 return CSymbolAssignmentStatement(
283 target=assignment_statement.target,
284 target_symbol_list_index=symbol_list_index,
285 expression=transform_expression(
287 assignment_statement.expression,
291 def transform_function_call_expression(accumulators, function_call):
292 # TODO Use the symbol from SYMBOL LIST
293 return CFunctionCallExpression(
294 function_expression=transform_expression(accumulators, function_call.function_expression),
295 argument_count=function_call.argument_count,
296 argument_items=transform_expression(accumulators, function_call.argument_items),
299 def transform_expression_statement(accumulators, statement):
300 return CExpressionStatement(
301 expression=transform_expression(accumulators, statement.expression),
304 def transform_if_else_statement(accumulators, statement):
305 return CIfElseStatement(
306 condition_expression=transform_expression(accumulators, statement.condition_expression),
307 if_statements=tuple(transform_statement(accumulators, s) for s in statement.if_statements),
308 else_statements=tuple(transform_statement(accumulators, s) for s in statement.else_statements),
311 def transform_array_variable_initialization_statement(accumulators, statement):
312 return CArrayVariableInitializationStatement(
313 variable=statement.variable,
314 items=tuple(transform_expression(accumulators, i) for i in statement.items),
317 def transform_variable_initialization_statement(accumulators, statement):
318 return CVariableInitializationStatement(
319 variable=statement.variable,
320 expression=transform_expression(accumulators, statement.expression),
323 def transform_variable_reassignment_statement(accumulators, statement):
324 return CVariableReassignmentStatement(
325 variable=statement.variable,
326 expression=transform_expression(accumulators, statement.expression),
329 def transform_function_definition_statement(accumulators, statement):
330 # TODO Allow defining the same function in different contexts
331 if any(fd.name == statement.name for fd in accumulators.function_definition_list):
332 raise Exception('A function with name "{}" already exists'.format(statement.name))
334 # TODO Add argument names to the symbol table
335 accumulators.function_definition_list.append(CFunctionDefinition(
337 argument_name_list=statement.argument_name_list,
338 statement_list=tuple(transform_statement(accumulators, s) for s in statement.statement_list)
341 return CFunctionDeclaration(name=statement.name)
343 def transform_statement(accumulators, statement):
345 parsing.FurExpressionStatement: transform_expression_statement,
346 normalization.NormalArrayVariableInitializationStatement: transform_array_variable_initialization_statement,
347 normalization.NormalAssignmentStatement: transform_symbol_assignment_statement,
348 normalization.NormalExpressionStatement: transform_expression_statement,
349 normalization.NormalFunctionDefinitionStatement: transform_function_definition_statement,
350 normalization.NormalIfElseStatement: transform_if_else_statement,
351 normalization.NormalVariableInitializationStatement: transform_variable_initialization_statement,
352 normalization.NormalVariableReassignmentStatement: transform_variable_reassignment_statement,
353 }[type(statement)](accumulators, statement)
356 Accumulators = collections.namedtuple(
360 'function_definition_list',
363 'string_literal_list',
367 def transform(program):
368 accumulators = Accumulators(
370 function_definition_list=[],
373 string_literal_list=[],
377 transform_statement(accumulators, statement) for statement in program.statement_list
380 # This prevents warnings about normalized variables being entire C statements
381 last_statement = statement_list[-1]
382 if isinstance(last_statement, normalization.NormalExpressionStatement) and isinstance(last_statement.expression, normalization.NormalVariableExpression):
383 del statement_list[-1]
385 standard_library_set = set()
386 for builtin in accumulators.builtin_set:
387 for standard_library in BUILTINS[builtin]:
388 standard_library_set.add(standard_library)
391 builtin_set=accumulators.builtin_set,
392 function_definition_list=accumulators.function_definition_list,
393 operator_declarations=tuple(sorted(accumulators.operator_set)),
394 statements=statement_list,
395 standard_libraries=standard_library_set,
396 string_literal_list=accumulators.string_literal_list,
397 symbol_list=accumulators.symbol_list,
401 if __name__ == '__main__':