6 CIntegerLiteral = collections.namedtuple(
13 CStringLiteral = collections.namedtuple(
21 CConstantExpression = collections.namedtuple(
22 'CConstantExpression',
28 CVariableExpression = collections.namedtuple(
29 'CVariableExpression',
35 CSymbolExpression = collections.namedtuple(
43 CNegationExpression = collections.namedtuple(
44 'CNegationExpression',
50 CFunctionCallForFurInfixOperator = collections.namedtuple(
51 'CFunctionCallForFurInfixOperator',
59 CFunctionCallExpression = collections.namedtuple(
60 'CFunctionCallExpression',
68 CSymbolAssignmentStatement = collections.namedtuple(
69 'CSymbolAssignmentStatement',
72 'target_symbol_list_index',
77 CArrayVariableInitializationStatement = collections.namedtuple(
78 'CArrayVariableInitializationStatement',
85 CVariableInitializationStatement = collections.namedtuple(
86 'CVariableInitializationStatement',
93 CVariableReassignmentStatement = collections.namedtuple(
94 'CVariableReassignmentStatement',
101 CExpressionStatement = collections.namedtuple(
102 'CExpressionStatement',
108 CIfElseStatement = collections.namedtuple(
111 'condition_expression',
117 CFunctionDeclaration = collections.namedtuple(
118 'CFunctionDeclaration',
124 CFunctionDefinition = collections.namedtuple(
125 'CFunctionDefinition',
132 CProgram = collections.namedtuple(
136 'function_definition_list',
138 'standard_libraries',
139 'string_literal_list',
144 EQUALITY_LEVEL_OPERATOR_TO_FUNCTION_NAME_MAPPING = {
147 '<=': 'lessThanOrEqual',
148 '>=': 'greaterThanOrEqual',
153 def transform_comparison_level_expression(accumulators, expression):
154 # Transform expressions like 1 < 2 < 3 into expressions like 1 < 2 && 2 < 3
155 if isinstance(expression.left, parsing.FurInfixExpression) and expression.left.order == 'comparison_level':
156 left = transform_comparison_level_expression(
163 right = transform_expression(
168 # TODO Don't evaluate the middle expression twice
169 return CFunctionCallForFurInfixOperator(
172 right=CFunctionCallForFurInfixOperator(
173 name=EQUALITY_LEVEL_OPERATOR_TO_FUNCTION_NAME_MAPPING[expression.operator],
179 return CFunctionCallForFurInfixOperator(
180 name=EQUALITY_LEVEL_OPERATOR_TO_FUNCTION_NAME_MAPPING[expression.operator],
181 left=transform_expression(accumulators, expression.left),
182 right=transform_expression(accumulators, expression.right),
188 'print': ['stdio.h'],
192 def transform_variable_expression(accumulators, expression):
193 return CVariableExpression(variable=expression.variable)
195 def transform_string_literal(accumulators, expression):
196 value = expression.value
199 index = accumulators.string_literal_list.index(value)
201 index = len(accumulators.string_literal_list)
202 accumulators.string_literal_list.append(value)
204 return CStringLiteral(index=index, value=value)
206 def transform_symbol_expression(accumulators, expression):
207 if expression.value in ['true', 'false']:
208 return CConstantExpression(value=expression.value)
210 if expression.value not in accumulators.symbol_list:
211 symbol_list.append(expression.value)
213 return CSymbolExpression(
214 symbol=expression.value,
215 symbol_list_index=accumulators.symbol_list.index(expression.value),
218 def transform_infix_expression(accumulators, expression):
219 if expression.order == 'comparison_level':
220 return transform_comparison_level_expression(accumulators, expression)
222 INFIX_OPERATOR_TO_FUNCTION_NAME = {
226 '//': 'integerDivide',
227 '%': 'modularDivide',
232 return CFunctionCallForFurInfixOperator(
233 name=INFIX_OPERATOR_TO_FUNCTION_NAME[expression.operator],
234 left=transform_expression(accumulators, expression.left),
235 right=transform_expression(accumulators, expression.right),
238 def transform_integer_literal_expression(accumulators, expression):
239 return CIntegerLiteral(value=expression.value)
241 def transform_parenthesized_expression(accumulators, expression):
242 # Parentheses can be removed because everything in the C output is explicitly parenthesized
243 return transform_expression(accumulators, expression.internal)
245 def transform_expression(accumulators, expression):
246 # TODO Clean up handlers for parsing expressions
248 parsing.FurFunctionCallExpression: transform_function_call_expression,
249 parsing.FurInfixExpression: transform_infix_expression,
250 parsing.FurIntegerLiteralExpression: transform_integer_literal_expression,
251 parsing.FurNegationExpression: transform_negation_expression,
252 parsing.FurParenthesizedExpression: transform_parenthesized_expression,
253 parsing.FurStringLiteralExpression: transform_string_literal,
254 parsing.FurSymbolExpression: transform_symbol_expression,
255 normalization.NormalFunctionCallExpression: transform_function_call_expression,
256 normalization.NormalInfixExpression: transform_infix_expression,
257 normalization.NormalNegationExpression: transform_negation_expression,
258 normalization.NormalVariableExpression: transform_variable_expression,
259 }[type(expression)](accumulators, expression)
261 def transform_symbol_assignment_statement(accumulators, assignment_statement):
262 # TODO Check that target is not a builtin
263 if assignment_statement.target not in accumulators.symbol_list:
264 accumulators.symbol_list.append(assignment_statement.target)
266 return CSymbolAssignmentStatement(
267 target=assignment_statement.target,
268 target_symbol_list_index=accumulators.symbol_list.index(assignment_statement.target),
269 expression=transform_expression(
271 assignment_statement.expression,
275 def transform_negation_expression(accumulators, expression):
276 return CNegationExpression(
277 value=transform_expression(accumulators, expression.internal_expression),
280 def transform_function_call_expression(accumulators, function_call):
281 if function_call.function.value in BUILTINS.keys():
282 # TODO Check that the builtin is actually callable
283 accumulators.builtin_set.add(function_call.function.value)
285 # TODO Use the symbol from SYMBOL LIST
286 return CFunctionCallExpression(
287 name=function_call.function.value,
288 argument_count=function_call.argument_count,
289 argument_items=transform_expression(accumulators, function_call.argument_items),
292 def transform_expression_statement(accumulators, statement):
293 # TODO At some point we can verify that all expression types are supported and just call transform_expression
295 parsing.FurFunctionCallExpression: transform_function_call_expression,
296 parsing.FurInfixExpression: transform_expression,
297 parsing.FurIntegerLiteralExpression: transform_expression,
298 parsing.FurSymbolExpression: transform_expression,
299 normalization.NormalFunctionCallExpression: transform_function_call_expression,
300 normalization.NormalVariableExpression: transform_expression,
301 }[type(statement.expression)](accumulators, statement.expression)
303 return CExpressionStatement(
304 expression=expression,
307 def transform_if_else_statement(accumulators, statement):
308 return CIfElseStatement(
309 condition_expression=transform_expression(accumulators, statement.condition_expression),
310 if_statements=tuple(transform_statement(accumulators, s) for s in statement.if_statements),
311 else_statements=tuple(transform_statement(accumulators, s) for s in statement.else_statements),
314 def transform_array_variable_initialization_statement(accumulators, statement):
315 return CArrayVariableInitializationStatement(
316 variable=statement.variable,
317 items=tuple(transform_expression(accumulators, i) for i in statement.items),
320 def transform_variable_initialization_statement(accumulators, statement):
321 return CVariableInitializationStatement(
322 variable=statement.variable,
323 expression=transform_expression(accumulators, statement.expression),
326 def transform_variable_reassignment_statement(accumulators, statement):
327 return CVariableReassignmentStatement(
328 variable=statement.variable,
329 expression=transform_expression(accumulators, statement.expression),
332 def transform_function_definition_statement(accumulators, statement):
333 # TODO Allow defining the same function in different contexts
334 if any(fd.name == statement.name for fd in accumulators.function_definition_list):
335 raise Exception('A function with name "{}" already exists'.format(statement.name))
337 accumulators.function_definition_list.append(CFunctionDefinition(
339 statement_list=tuple(transform_statement(accumulators, s) for s in statement.statement_list)
342 return CFunctionDeclaration(name=statement.name)
344 def transform_statement(accumulators, statement):
346 parsing.FurAssignmentStatement: transform_symbol_assignment_statement,
347 parsing.FurExpressionStatement: transform_expression_statement,
348 normalization.NormalArrayVariableInitializationStatement: transform_array_variable_initialization_statement,
349 normalization.NormalExpressionStatement: transform_expression_statement,
350 normalization.NormalFunctionDefinitionStatement: transform_function_definition_statement,
351 normalization.NormalIfElseStatement: transform_if_else_statement,
352 normalization.NormalVariableInitializationStatement: transform_variable_initialization_statement,
353 normalization.NormalVariableReassignmentStatement: transform_variable_reassignment_statement,
354 }[type(statement)](accumulators, statement)
357 Accumulators = collections.namedtuple(
361 'function_definition_list',
364 'string_literal_list',
368 def transform(program):
369 accumulators = Accumulators(
371 function_definition_list=[],
374 string_literal_list=[],
378 transform_statement(accumulators, statement) for statement in program.statement_list
381 standard_library_set = set()
382 for builtin in accumulators.builtin_set:
383 for standard_library in BUILTINS[builtin]:
384 standard_library_set.add(standard_library)
387 builtin_set=accumulators.builtin_set,
388 function_definition_list=accumulators.function_definition_list,
389 statements=statement_list,
390 standard_libraries=standard_library_set,
391 string_literal_list=accumulators.string_literal_list,
392 symbol_list=accumulators.symbol_list,
396 if __name__ == '__main__':