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',
137 'operator_declarations',
139 'standard_libraries',
140 'string_literal_list',
148 'print': ['stdio.h'],
152 def transform_variable_expression(accumulators, expression):
153 return CVariableExpression(variable=expression.variable)
155 def transform_string_literal(accumulators, expression):
156 value = expression.value
159 index = accumulators.string_literal_list.index(value)
161 index = len(accumulators.string_literal_list)
162 accumulators.string_literal_list.append(value)
164 return CStringLiteral(index=index, value=value)
166 def transform_symbol_expression(accumulators, expression):
167 if expression.value in ['true', 'false']:
168 return CConstantExpression(value=expression.value)
170 if expression.value not in accumulators.symbol_list:
171 symbol_list.append(expression.value)
173 return CSymbolExpression(
174 symbol=expression.value,
175 symbol_list_index=accumulators.symbol_list.index(expression.value),
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.value)
253 def transform_parenthesized_expression(accumulators, expression):
254 # Parentheses can be removed because everything in the C output is explicitly parenthesized
255 return transform_expression(accumulators, expression.internal)
257 def transform_negation_expression(accumulators, expression):
258 return CNegationExpression(
259 value=transform_expression(accumulators, expression.internal_expression),
262 def transform_expression(accumulators, expression):
263 # TODO Clean up handlers for parsing expressions
265 parsing.FurFunctionCallExpression: transform_function_call_expression,
266 parsing.FurInfixExpression: transform_infix_expression,
267 parsing.FurIntegerLiteralExpression: transform_integer_literal_expression,
268 parsing.FurNegationExpression: transform_negation_expression,
269 parsing.FurParenthesizedExpression: transform_parenthesized_expression,
270 parsing.FurStringLiteralExpression: transform_string_literal,
271 parsing.FurSymbolExpression: transform_symbol_expression,
272 normalization.NormalFunctionCallExpression: transform_function_call_expression,
273 normalization.NormalInfixExpression: transform_infix_expression,
274 normalization.NormalNegationExpression: transform_negation_expression,
275 normalization.NormalVariableExpression: transform_variable_expression,
276 }[type(expression)](accumulators, expression)
278 def transform_symbol_assignment_statement(accumulators, assignment_statement):
279 # TODO Check that target is not a builtin
280 if assignment_statement.target not in accumulators.symbol_list:
281 accumulators.symbol_list.append(assignment_statement.target)
283 return CSymbolAssignmentStatement(
284 target=assignment_statement.target,
285 target_symbol_list_index=accumulators.symbol_list.index(assignment_statement.target),
286 expression=transform_expression(
288 assignment_statement.expression,
292 def transform_function_call_expression(accumulators, function_call):
293 if function_call.function.value in BUILTINS.keys():
294 # TODO Check that the builtin is actually callable
295 accumulators.builtin_set.add(function_call.function.value)
297 # TODO Use the symbol from SYMBOL LIST
298 return CFunctionCallExpression(
299 name=function_call.function.value,
300 argument_count=function_call.argument_count,
301 argument_items=transform_expression(accumulators, function_call.argument_items),
304 def transform_expression_statement(accumulators, statement):
305 # TODO At some point we can verify that all expression types are supported and just call transform_expression
307 parsing.FurFunctionCallExpression: transform_function_call_expression,
308 parsing.FurInfixExpression: transform_expression,
309 parsing.FurIntegerLiteralExpression: transform_expression,
310 parsing.FurSymbolExpression: transform_expression,
311 normalization.NormalFunctionCallExpression: transform_function_call_expression,
312 normalization.NormalVariableExpression: transform_expression,
313 }[type(statement.expression)](accumulators, statement.expression)
315 return CExpressionStatement(
316 expression=expression,
319 def transform_if_else_statement(accumulators, statement):
320 return CIfElseStatement(
321 condition_expression=transform_expression(accumulators, statement.condition_expression),
322 if_statements=tuple(transform_statement(accumulators, s) for s in statement.if_statements),
323 else_statements=tuple(transform_statement(accumulators, s) for s in statement.else_statements),
326 def transform_array_variable_initialization_statement(accumulators, statement):
327 return CArrayVariableInitializationStatement(
328 variable=statement.variable,
329 items=tuple(transform_expression(accumulators, i) for i in statement.items),
332 def transform_variable_initialization_statement(accumulators, statement):
333 return CVariableInitializationStatement(
334 variable=statement.variable,
335 expression=transform_expression(accumulators, statement.expression),
338 def transform_variable_reassignment_statement(accumulators, statement):
339 return CVariableReassignmentStatement(
340 variable=statement.variable,
341 expression=transform_expression(accumulators, statement.expression),
344 def transform_function_definition_statement(accumulators, statement):
345 # TODO Allow defining the same function in different contexts
346 if any(fd.name == statement.name for fd in accumulators.function_definition_list):
347 raise Exception('A function with name "{}" already exists'.format(statement.name))
349 accumulators.function_definition_list.append(CFunctionDefinition(
351 statement_list=tuple(transform_statement(accumulators, s) for s in statement.statement_list)
354 return CFunctionDeclaration(name=statement.name)
356 def transform_statement(accumulators, statement):
358 parsing.FurAssignmentStatement: transform_symbol_assignment_statement,
359 parsing.FurExpressionStatement: transform_expression_statement,
360 normalization.NormalArrayVariableInitializationStatement: transform_array_variable_initialization_statement,
361 normalization.NormalExpressionStatement: transform_expression_statement,
362 normalization.NormalFunctionDefinitionStatement: transform_function_definition_statement,
363 normalization.NormalIfElseStatement: transform_if_else_statement,
364 normalization.NormalVariableInitializationStatement: transform_variable_initialization_statement,
365 normalization.NormalVariableReassignmentStatement: transform_variable_reassignment_statement,
366 }[type(statement)](accumulators, statement)
369 Accumulators = collections.namedtuple(
373 'function_definition_list',
376 'string_literal_list',
380 def transform(program):
381 accumulators = Accumulators(
383 function_definition_list=[],
386 string_literal_list=[],
390 transform_statement(accumulators, statement) for statement in program.statement_list
393 standard_library_set = set()
394 for builtin in accumulators.builtin_set:
395 for standard_library in BUILTINS[builtin]:
396 standard_library_set.add(standard_library)
399 builtin_set=accumulators.builtin_set,
400 function_definition_list=accumulators.function_definition_list,
401 operator_declarations=tuple(sorted(accumulators.operator_set)),
402 statements=statement_list,
403 standard_libraries=standard_library_set,
404 string_literal_list=accumulators.string_literal_list,
405 symbol_list=accumulators.symbol_list,
409 if __name__ == '__main__':