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',
67 CSymbolAssignmentStatement = collections.namedtuple(
68 'CSymbolAssignmentStatement',
71 'target_symbol_list_index',
76 CVariableAssignmentStatement = collections.namedtuple(
77 'CVariableAssignmentStatement',
84 CExpressionStatement = collections.namedtuple(
85 'CExpressionStatement',
91 CProgram = collections.namedtuple(
97 'string_literal_list',
102 EQUALITY_LEVEL_OPERATOR_TO_FUNCTION_NAME_MAPPING = {
105 '<=': 'lessThanOrEqual',
106 '>=': 'greaterThanOrEqual',
111 def transform_equality_level_expression(accumulators, expression):
112 # Transform expressions like 1 < 2 < 3 into expressions like 1 < 2 && 2 < 3
113 if isinstance(expression.left, parsing.FurInfixExpression) and expression.left.order == 'equality_level':
114 left = transform_equality_level_expression(
121 right = transform_expression(
126 # TODO Don't evaluate the middle expression twice
127 return CFunctionCallForFurInfixOperator(
130 right=CFunctionCallForFurInfixOperator(
131 name=EQUALITY_LEVEL_OPERATOR_TO_FUNCTION_NAME_MAPPING[expression.operator],
137 return CFunctionCallForFurInfixOperator(
138 name=EQUALITY_LEVEL_OPERATOR_TO_FUNCTION_NAME_MAPPING[expression.operator],
139 left=transform_expression(accumulators, expression.left),
140 right=transform_expression(accumulators, expression.right),
146 'print': ['stdio.h'],
150 def transform_variable_expression(accumulators, expression):
151 return CVariableExpression(variable=expression.variable)
153 def transform_expression(accumulators, expression):
154 if isinstance(expression, parsing.FurParenthesizedExpression):
155 # Parentheses can be removed because everything in the C output is explicitly parenthesized
156 return transform_expression(accumulators, expression.internal)
158 if isinstance(expression, parsing.FurNegationExpression):
159 return transform_negation_expression(accumulators, expression)
161 if isinstance(expression, parsing.FurFunctionCallExpression):
162 return transform_function_call_expression(accumulators, expression)
164 if isinstance(expression, parsing.FurSymbolExpression):
165 if expression.value in ['true', 'false']:
166 return CConstantExpression(value=expression.value)
168 if expression.value not in accumulators.symbol_list:
169 symbol_list.append(expression.value)
171 return CSymbolExpression(
172 symbol=expression.value,
173 symbol_list_index=accumulators.symbol_list.index(expression.value),
176 if isinstance(expression, parsing.FurStringLiteralExpression):
177 value = expression.value
180 index = accumulators.string_literal_list.index(value)
182 index = len(accumulators.string_literal_list)
183 accumulators.string_literal_list.append(value)
185 return CStringLiteral(index=index, value=value)
187 LITERAL_TYPE_MAPPING = {
188 parsing.FurIntegerLiteralExpression: CIntegerLiteral,
191 if type(expression) in LITERAL_TYPE_MAPPING:
192 return LITERAL_TYPE_MAPPING[type(expression)](value=expression.value)
194 if isinstance(expression, parsing.FurInfixExpression):
195 if expression.order == 'equality_level':
196 return transform_equality_level_expression(accumulators, expression)
198 INFIX_OPERATOR_TO_FUNCTION_NAME = {
202 '//': 'integerDivide',
203 '%': 'modularDivide',
208 return CFunctionCallForFurInfixOperator(
209 name=INFIX_OPERATOR_TO_FUNCTION_NAME[expression.operator],
210 left=transform_expression(accumulators, expression.left),
211 right=transform_expression(accumulators, expression.right),
214 # TODO Handle all possible types in this form
216 normalization.NormalVariableExpression: transform_variable_expression,
217 }[type(expression)](accumulators, expression)
219 def transform_symbol_assignment_statement(accumulators, assignment_statement):
220 # TODO Check that target is not a builtin
221 if assignment_statement.target not in accumulators.symbol_list:
222 accumulators.symbol_list.append(assignment_statement.target)
224 return CSymbolAssignmentStatement(
225 target=assignment_statement.target,
226 target_symbol_list_index=accumulators.symbol_list.index(assignment_statement.target),
227 expression=transform_expression(
229 assignment_statement.expression,
233 def transform_negation_expression(accumulators, negation_expression):
234 return CNegationExpression(
235 value=transform_expression(accumulators, negation_expression.value),
238 def transform_function_call_expression(accumulators, function_call):
239 if function_call.function.value in BUILTINS.keys():
240 # TODO Check that the builtin is actually callable
241 accumulators.builtin_set.add(function_call.function.value)
243 return CFunctionCallExpression(
244 name='builtin$' + function_call.function.value,
246 transform_expression(accumulators, arg)
247 for arg in function_call.arguments
253 def transform_expression_statement(accumulators, statement):
255 parsing.FurFunctionCallExpression: transform_function_call_expression,
256 normalization.NormalFunctionCallExpression: transform_function_call_expression,
257 }[type(statement.expression)](accumulators, statement.expression)
259 return CExpressionStatement(
260 expression=expression,
263 def transform_variable_assignment_statement(accumulators, statement):
264 return CVariableAssignmentStatement(
265 variable=statement.variable,
266 expression=transform_expression(accumulators, statement.expression),
269 def transform_statement(accumulators, statement):
271 parsing.FurAssignmentStatement: transform_symbol_assignment_statement,
272 parsing.FurExpressionStatement: transform_expression_statement,
273 normalization.NormalVariableAssignmentStatement: transform_variable_assignment_statement,
274 normalization.NormalExpressionStatement: transform_expression_statement,
275 }[type(statement)](accumulators, statement)
278 Accumulators = collections.namedtuple(
283 'string_literal_list',
287 def transform(program):
288 accumulators = Accumulators(
291 string_literal_list=[],
295 transform_statement(accumulators, statement) for statement in program.statement_list
298 standard_library_set = set()
299 for builtin in accumulators.builtin_set:
300 for standard_library in BUILTINS[builtin]:
301 standard_library_set.add(standard_library)
304 builtin_set=accumulators.builtin_set,
305 statements=statement_list,
306 standard_libraries=standard_library_set,
307 string_literal_list=accumulators.string_literal_list,
308 symbol_list=accumulators.symbol_list,
312 if __name__ == '__main__':