import collections
+import normalization
import parsing
CIntegerLiteral = collections.namedtuple(
],
)
+CVariableExpression = collections.namedtuple(
+ 'CVariableExpression',
+ [
+ 'variable',
+ ],
+)
+
CSymbolExpression = collections.namedtuple(
'CSymbolExpression',
[
'CFunctionCallExpression',
[
'name',
- 'arguments',
+ 'argument_count',
+ 'argument_items',
],
)
-CAssignmentStatement = collections.namedtuple(
- 'CAssignmentStatement',
+CSymbolAssignmentStatement = collections.namedtuple(
+ 'CSymbolAssignmentStatement',
[
'target',
'target_symbol_list_index',
],
)
+CArrayVariableInitializationStatement = collections.namedtuple(
+ 'CArrayVariableInitializationStatement',
+ [
+ 'variable',
+ 'items',
+ ],
+)
+
+CVariableInitializationStatement = collections.namedtuple(
+ 'CVariableInitializationStatement',
+ [
+ 'variable',
+ 'expression',
+ ],
+)
+
+CVariableReassignmentStatement = collections.namedtuple(
+ 'CVariableReassignmentStatement',
+ [
+ 'variable',
+ 'expression',
+ ],
+)
+
+CExpressionStatement = collections.namedtuple(
+ 'CExpressionStatement',
+ [
+ 'expression',
+ ],
+)
+
+CIfElseStatement = collections.namedtuple(
+ 'CIfElseStatement',
+ [
+ 'condition_expression',
+ 'if_statements',
+ 'else_statements',
+ ],
+)
+
+CFunctionDeclaration = collections.namedtuple(
+ 'CFunctionDeclaration',
+ [
+ 'name',
+ ],
+)
+
+CFunctionDefinition = collections.namedtuple(
+ 'CFunctionDefinition',
+ [
+ 'name',
+ 'statement_list',
+ ],
+)
+
CProgram = collections.namedtuple(
'CProgram',
[
'builtin_set',
+ 'function_definition_list',
+ 'operator_declarations',
'statements',
'standard_libraries',
'string_literal_list',
'>': 'greaterThan',
}
-def transform_equality_level_expression(accumulators, expression):
+def transform_comparison_level_expression(accumulators, expression):
# Transform expressions like 1 < 2 < 3 into expressions like 1 < 2 && 2 < 3
- if isinstance(expression.left, parsing.FurInfixExpression) and expression.left.order == 'equality_level':
- left = transform_equality_level_expression(
+ if isinstance(expression.left, parsing.FurInfixExpression) and expression.left.order == 'comparison_level':
+ left = transform_comparison_level_expression(
accumulators,
expression.left
)
'true': [],
}
-def transform_expression(accumulators, expression):
- if isinstance(expression, parsing.FurParenthesizedExpression):
- # Parentheses can be removed because everything in the C output is explicitly parenthesized
- return transform_expression(accumulators, expression.internal)
+def transform_variable_expression(accumulators, expression):
+ return CVariableExpression(variable=expression.variable)
- if isinstance(expression, parsing.FurNegationExpression):
- return transform_negation_expression(accumulators, expression)
+def transform_string_literal(accumulators, expression):
+ value = expression.value
- if isinstance(expression, parsing.FurFunctionCallExpression):
- return transform_function_call_expression(accumulators, expression)
+ try:
+ index = accumulators.string_literal_list.index(value)
+ except ValueError:
+ index = len(accumulators.string_literal_list)
+ accumulators.string_literal_list.append(value)
- if isinstance(expression, parsing.FurSymbolExpression):
- if expression.value in ['true', 'false']:
- return CConstantExpression(value=expression.value)
+ return CStringLiteral(index=index, value=value)
- if expression.value not in accumulators.symbol_list:
- symbol_list.append(expression.value)
+def transform_symbol_expression(accumulators, expression):
+ if expression.value in ['true', 'false']:
+ return CConstantExpression(value=expression.value)
- return CSymbolExpression(
- symbol=expression.value,
- symbol_list_index=accumulators.symbol_list.index(expression.value),
- )
+ if expression.value not in accumulators.symbol_list:
+ symbol_list.append(expression.value)
- if isinstance(expression, parsing.FurStringLiteralExpression):
- value = expression.value
+ return CSymbolExpression(
+ symbol=expression.value,
+ symbol_list_index=accumulators.symbol_list.index(expression.value),
+ )
- try:
- index = accumulators.string_literal_list.index(value)
- except ValueError:
- index = len(accumulators.string_literal_list)
- accumulators.string_literal_list.append(value)
+CInfixOperatorDeclaration = collections.namedtuple(
+ 'CInfixOperatorDeclaration',
+ [
+ 'name',
+ 'input_type',
+ 'result_type',
+ 'c_operator',
+ ],
+)
- return CStringLiteral(index=index, value=value)
+INFIX_OPERATOR_TO_DECLARATION = {
+ '+': CInfixOperatorDeclaration(name='add', input_type='INTEGER', result_type='INTEGER', c_operator='+'),
+ '-': CInfixOperatorDeclaration(name='subtract', input_type='INTEGER', result_type='INTEGER', c_operator='-'),
+ '*': CInfixOperatorDeclaration(name='multiply', input_type='INTEGER', result_type='INTEGER', c_operator='*'),
+ '//': CInfixOperatorDeclaration(name='integerDivide', input_type='INTEGER', result_type='INTEGER', c_operator='/'),
+ '%': CInfixOperatorDeclaration(name='modularDivide', input_type='INTEGER', result_type='INTEGER', c_operator='%'),
+ 'and': CInfixOperatorDeclaration(name='and', input_type='BOOLEAN', result_type='BOOLEAN', c_operator='&&'),
+ 'or': CInfixOperatorDeclaration(name='or', input_type='BOOLEAN', result_type='BOOLEAN', c_operator='||'),
+}
- LITERAL_TYPE_MAPPING = {
- parsing.FurIntegerLiteralExpression: CIntegerLiteral,
- }
+def transform_infix_expression(accumulators, expression):
+ if expression.order == 'comparison_level':
+ return transform_comparison_level_expression(accumulators, expression)
- if type(expression) in LITERAL_TYPE_MAPPING:
- return LITERAL_TYPE_MAPPING[type(expression)](value=expression.value)
+ accumulators.operator_set.add(INFIX_OPERATOR_TO_DECLARATION[expression.operator])
- if isinstance(expression, parsing.FurInfixExpression):
- if expression.order == 'equality_level':
- return transform_equality_level_expression(accumulators, expression)
+ return CFunctionCallForFurInfixOperator(
+ name=INFIX_OPERATOR_TO_DECLARATION[expression.operator].name,
+ left=transform_expression(accumulators, expression.left),
+ right=transform_expression(accumulators, expression.right),
+ )
- INFIX_OPERATOR_TO_FUNCTION_NAME = {
- '+': 'add',
- '-': 'subtract',
- '*': 'multiply',
- '//': 'integerDivide',
- '%': 'modularDivide',
- 'and': 'and',
- 'or': 'or',
- }
+def transform_integer_literal_expression(accumulators, expression):
+ return CIntegerLiteral(value=expression.value)
- return CFunctionCallForFurInfixOperator(
- name=INFIX_OPERATOR_TO_FUNCTION_NAME[expression.operator],
- left=transform_expression(accumulators, expression.left),
- right=transform_expression(accumulators, expression.right),
- )
+def transform_parenthesized_expression(accumulators, expression):
+ # Parentheses can be removed because everything in the C output is explicitly parenthesized
+ return transform_expression(accumulators, expression.internal)
- raise Exception('Could not transform expression "{}"'.format(expression))
+def transform_negation_expression(accumulators, expression):
+ return CNegationExpression(
+ value=transform_expression(accumulators, expression.internal_expression),
+ )
-def transform_assignment_statement(accumulators, assignment_statement):
+def transform_expression(accumulators, expression):
+ # TODO Clean up handlers for parsing expressions
+ return {
+ parsing.FurFunctionCallExpression: transform_function_call_expression,
+ parsing.FurInfixExpression: transform_infix_expression,
+ parsing.FurIntegerLiteralExpression: transform_integer_literal_expression,
+ parsing.FurNegationExpression: transform_negation_expression,
+ parsing.FurParenthesizedExpression: transform_parenthesized_expression,
+ parsing.FurStringLiteralExpression: transform_string_literal,
+ parsing.FurSymbolExpression: transform_symbol_expression,
+ normalization.NormalFunctionCallExpression: transform_function_call_expression,
+ normalization.NormalInfixExpression: transform_infix_expression,
+ normalization.NormalNegationExpression: transform_negation_expression,
+ normalization.NormalVariableExpression: transform_variable_expression,
+ }[type(expression)](accumulators, expression)
+
+def transform_symbol_assignment_statement(accumulators, assignment_statement):
# TODO Check that target is not a builtin
if assignment_statement.target not in accumulators.symbol_list:
accumulators.symbol_list.append(assignment_statement.target)
- return CAssignmentStatement(
+ return CSymbolAssignmentStatement(
target=assignment_statement.target,
target_symbol_list_index=accumulators.symbol_list.index(assignment_statement.target),
expression=transform_expression(
),
)
-def transform_negation_expression(accumulators, negation_expression):
- return CNegationExpression(
- value=transform_expression(accumulators, negation_expression.value),
- )
-
def transform_function_call_expression(accumulators, function_call):
if function_call.function.value in BUILTINS.keys():
# TODO Check that the builtin is actually callable
accumulators.builtin_set.add(function_call.function.value)
- return CFunctionCallExpression(
- name='builtin$' + function_call.function.value,
- arguments=tuple(
- transform_expression(accumulators, arg)
- for arg in function_call.arguments
- ),
- )
+ # TODO Use the symbol from SYMBOL LIST
+ return CFunctionCallExpression(
+ name=function_call.function.value,
+ argument_count=function_call.argument_count,
+ argument_items=transform_expression(accumulators, function_call.argument_items),
+ )
- raise Exception()
+def transform_expression_statement(accumulators, statement):
+ # TODO At some point we can verify that all expression types are supported and just call transform_expression
+ expression = {
+ parsing.FurFunctionCallExpression: transform_function_call_expression,
+ parsing.FurInfixExpression: transform_expression,
+ parsing.FurIntegerLiteralExpression: transform_expression,
+ parsing.FurSymbolExpression: transform_expression,
+ normalization.NormalFunctionCallExpression: transform_function_call_expression,
+ normalization.NormalVariableExpression: transform_expression,
+ }[type(statement.expression)](accumulators, statement.expression)
+
+ return CExpressionStatement(
+ expression=expression,
+ )
+
+def transform_if_else_statement(accumulators, statement):
+ return CIfElseStatement(
+ condition_expression=transform_expression(accumulators, statement.condition_expression),
+ if_statements=tuple(transform_statement(accumulators, s) for s in statement.if_statements),
+ else_statements=tuple(transform_statement(accumulators, s) for s in statement.else_statements),
+ )
+
+def transform_array_variable_initialization_statement(accumulators, statement):
+ return CArrayVariableInitializationStatement(
+ variable=statement.variable,
+ items=tuple(transform_expression(accumulators, i) for i in statement.items),
+ )
+
+def transform_variable_initialization_statement(accumulators, statement):
+ return CVariableInitializationStatement(
+ variable=statement.variable,
+ expression=transform_expression(accumulators, statement.expression),
+ )
+
+def transform_variable_reassignment_statement(accumulators, statement):
+ return CVariableReassignmentStatement(
+ variable=statement.variable,
+ expression=transform_expression(accumulators, statement.expression),
+ )
+
+def transform_function_definition_statement(accumulators, statement):
+ # TODO Allow defining the same function in different contexts
+ if any(fd.name == statement.name for fd in accumulators.function_definition_list):
+ raise Exception('A function with name "{}" already exists'.format(statement.name))
+
+ accumulators.function_definition_list.append(CFunctionDefinition(
+ name=statement.name,
+ statement_list=tuple(transform_statement(accumulators, s) for s in statement.statement_list)
+ ))
+
+ return CFunctionDeclaration(name=statement.name)
def transform_statement(accumulators, statement):
return {
- parsing.FurAssignmentStatement: transform_assignment_statement,
- parsing.FurFunctionCallExpression: transform_function_call_expression,
+ parsing.FurAssignmentStatement: transform_symbol_assignment_statement,
+ parsing.FurExpressionStatement: transform_expression_statement,
+ normalization.NormalArrayVariableInitializationStatement: transform_array_variable_initialization_statement,
+ normalization.NormalExpressionStatement: transform_expression_statement,
+ normalization.NormalFunctionDefinitionStatement: transform_function_definition_statement,
+ normalization.NormalIfElseStatement: transform_if_else_statement,
+ normalization.NormalVariableInitializationStatement: transform_variable_initialization_statement,
+ normalization.NormalVariableReassignmentStatement: transform_variable_reassignment_statement,
}[type(statement)](accumulators, statement)
'Accumulators',
[
'builtin_set',
+ 'function_definition_list',
+ 'operator_set',
'symbol_list',
'string_literal_list',
],
def transform(program):
accumulators = Accumulators(
builtin_set=set(),
+ function_definition_list=[],
+ operator_set=set(),
symbol_list=[],
string_literal_list=[],
)
- c_statements = [
+ statement_list = [
transform_statement(accumulators, statement) for statement in program.statement_list
]
- standard_libraries = set()
+ standard_library_set = set()
for builtin in accumulators.builtin_set:
for standard_library in BUILTINS[builtin]:
- standard_libraries.add(standard_library)
+ standard_library_set.add(standard_library)
return CProgram(
builtin_set=accumulators.builtin_set,
- statements=c_statements,
- standard_libraries=standard_libraries,
+ function_definition_list=accumulators.function_definition_list,
+ operator_declarations=tuple(sorted(accumulators.operator_set)),
+ statements=statement_list,
+ standard_libraries=standard_library_set,
string_literal_list=accumulators.string_literal_list,
symbol_list=accumulators.symbol_list,
)
projects / fur / blobdiff