X-Git-Url: https://code.kerkeslager.com/?p=fur;a=blobdiff_plain;f=normalization.py;h=8248169c9210e0a2d005bfafe5a6e6455c434877;hp=94d3a7c078ff3c45682d147175212207c8e3e329;hb=HEAD;hpb=25ebb2556ea388656346b0efafa80e66f61057de diff --git a/normalization.py b/normalization.py index 94d3a7c..8248169 100644 --- a/normalization.py +++ b/normalization.py @@ -1,6 +1,14 @@ import collections -import parsing +import desugaring +import util + +NormalBuiltinExpression = collections.namedtuple( + 'NormalBuiltinExpression', + ( + 'symbol', + ), +) NormalVariableExpression = collections.namedtuple( 'NormalVariableExpression', @@ -9,21 +17,56 @@ NormalVariableExpression = collections.namedtuple( ], ) -NormalInfixExpression = collections.namedtuple( - 'NormalInfixExpression', +NormalIntegerLiteralExpression = collections.namedtuple( + 'NormalIntegerLiteralExpression', + [ + 'integer', + ], +) + +NormalLambdaExpression = collections.namedtuple( + 'NormalLambdaExpression', + ( + 'name', + 'argument_name_list', + 'statement_list', + ), +) + +NormalStringLiteralExpression = collections.namedtuple( + 'NormalStringLiteralExpression', [ - 'order', - 'operator', - 'left', - 'right', + 'string', ], ) +NormalSymbolExpression = collections.namedtuple( + 'NormalSymbolExpression', + ( + 'symbol', + ), +) + +NormalSymbolLiteralExpression = collections.namedtuple( + 'NormalSymbolLiteralExpression', + ( + 'symbol', + ), +) + +NormalPushStatement = collections.namedtuple( + 'NormalPushStatement', + ( + 'expression', + ), +) + NormalFunctionCallExpression = collections.namedtuple( 'NormalFunctionCallExpression', [ - 'function', - 'arguments', + 'metadata', + 'function_expression', + 'argument_count', ], ) @@ -42,6 +85,23 @@ NormalExpressionStatement = collections.namedtuple( ], ) +NormalAssignmentStatement = collections.namedtuple( + 'NormalAssignmentStatement', + [ + 'target', + 'expression', + ], +) + +NormalIfElseExpression = collections.namedtuple( + 'NormalIfElseExpression', + [ + 'condition_expression', + 'if_statement_list', + 'else_statement_list', + ], +) + NormalProgram = collections.namedtuple( 'NormalProgram', [ @@ -49,162 +109,213 @@ NormalProgram = collections.namedtuple( ], ) -def fake_normalization(counter, thing): - return (counter, (), thing) - -def normalize_function_call_expression(counter, expression): - assert isinstance(expression, parsing.FurFunctionCallExpression) - - prestatements = [] - arguments = [] +def normalize_builtin_expression(counter, expression): + return ( + counter, + (), + NormalBuiltinExpression(symbol=expression.symbol), + ) - for argument in expression.arguments: - counter, argument_prestatements, normalized_argument = normalize_expression(counter, argument) +def normalize_integer_literal_expression(counter, expression): + return ( + counter, + (), + NormalIntegerLiteralExpression(integer=expression.integer), + ) - for s in argument_prestatements: - prestatements.append(s) +def normalize_lambda_expression(counter, expression): + variable = '${}'.format(counter) - variable = '${}'.format(counter) - prestatements.append(NormalVariableInitializationStatement( - variable=variable, - expression=normalized_argument, - )) - arguments.append(NormalVariableExpression( - variable=variable, - )) - counter += 1 + _, statement_list = normalize_statement_list( + 0, + expression.statement_list, + ) return ( - counter, - tuple(prestatements), - NormalFunctionCallExpression( - expression.function, # TODO Normalize the function - arguments=tuple(arguments), + counter + 1, + ( + NormalVariableInitializationStatement( + variable=variable, + expression=NormalLambdaExpression( + name=expression.name, + argument_name_list=expression.argument_name_list, + statement_list=statement_list, + ), + ), ), + NormalVariableExpression(variable=variable), ) -def normalize_basic_infix_operation(counter, expression): - counter, left_prestatements, left_expression = normalize_expression(counter, expression.left) - counter, right_prestatements, right_expression = normalize_expression(counter, expression.right) +NormalListConstructExpression = collections.namedtuple( + 'NormalListConstructExpression', + [ + 'allocate', + ], +) - left_variable = '${}'.format(counter) - counter += 1 - right_variable = '${}'.format(counter) +def normalize_list_literal_expression(counter, expression): + list_variable = '${}'.format(counter) counter += 1 - root_prestatements = ( - NormalVariableInitializationStatement( - variable=left_variable, - expression=left_expression, - ), - NormalVariableInitializationStatement( - variable=right_variable, - expression=right_expression, - ), + prestatements = [] + + for item_expression in expression.item_expression_list: + counter, item_expression_prestatements, normalized = normalize_expression( + counter, + item_expression, + ) + + for p in item_expression_prestatements: + prestatements.append(p) + + prestatements.append( + NormalPushStatement( + expression=normalized, + ) + ) + + return ( + counter, + tuple(prestatements), + NormalListConstructExpression(allocate=len(expression.item_expression_list)), ) +def normalize_string_literal_expression(counter, expression): return ( counter, - left_prestatements + right_prestatements + root_prestatements, - NormalInfixExpression( - order=expression.order, # TODO Do we need this? - operator=expression.operator, - left=NormalVariableExpression(variable=left_variable), - right=NormalVariableExpression(variable=right_variable), - ), + (), + NormalStringLiteralExpression(string=expression.string), ) -def normalize_comparison_expression(counter, expression): - stack = [] +NormalStructureLiteralExpression = collections.namedtuple( + 'NormalStructureLiteralExpression', + ( + 'field_count', + ), +) + +def normalize_structure_literal_expression(counter, expression): + prestatements = [] - while isinstance(expression.left, parsing.FurInfixExpression) and expression.order == 'comparison_level': - stack.append((expression.operator, expression.order, expression.right)) - expression = expression.left + for field in expression.fields: + counter, field_expression_prestatements, field_expression = normalize_expression( + counter, + field.expression, + ) - counter, left_prestatements, left_expression = normalize_expression(counter, expression.left) - counter, right_prestatements, right_expression = normalize_expression(counter, expression.right) + for p in field_expression_prestatements: + prestatements.append(p) - left_variable = '${}'.format(counter) - counter += 1 - right_variable = '${}'.format(counter) - counter += 1 + prestatements.append(NormalPushStatement( + expression=field_expression, + )) - root_prestatements = ( - NormalVariableInitializationStatement( - variable=left_variable, - expression=left_expression, - ), - NormalVariableInitializationStatement( - variable=right_variable, - expression=right_expression, + prestatements.append(NormalPushStatement( + expression=NormalSymbolLiteralExpression( + symbol=field.symbol, + ), + )) + + return ( + counter, + tuple(prestatements), + NormalStructureLiteralExpression( + field_count=len(expression.fields), ), ) - counter, result_prestatements, result_expression = ( +def normalize_symbol_expression(counter, expression): + return ( counter, - left_prestatements + right_prestatements + root_prestatements, - # TODO Implement short-circuiting - NormalInfixExpression( - order=expression.order, # TODO Do we need this? - operator=expression.operator, - left=NormalVariableExpression(variable=left_variable), - right=NormalVariableExpression(variable=right_variable), - ), + (), + NormalSymbolExpression(symbol=expression.symbol), ) - while len(stack) > 0: - right_operator, right_order, right_expression = stack.pop() - and_right_expression = parsing.FurInfixExpression( - operator=right_operator, - order=right_order, - left=NormalVariableExpression(variable=right_variable), - right=right_expression, - ) +def normalize_symbol_literal_expression(counter, expression): + return ( + counter, + (), + NormalSymbolLiteralExpression(symbol=expression.symbol), + ) - and_expression = parsing.FurInfixExpression( - operator='and', - order='and_level', - left=result_expression, - right=and_right_expression, - ) +def normalize_function_call_expression(counter, expression): + prestatements = [] - counter, and_prestatements, result_expression = normalize_boolean_expression( - counter, - and_expression, + for argument in expression.argument_list: + counter, argument_prestatements, normalized_argument = normalize_expression(counter, argument) + + for s in argument_prestatements: + prestatements.append(s) + + prestatements.append( + NormalPushStatement( + expression=normalized_argument, + ), ) - result_prestatements = result_prestatements + and_prestatements + counter, function_prestatements, function_expression = normalize_expression( + counter, + expression.function, + ) + + for ps in function_prestatements: + prestatements.append(ps) - return (counter, result_prestatements, result_expression) + return ( + counter, + tuple(prestatements), + NormalFunctionCallExpression( + metadata=expression.metadata, + function_expression=function_expression, + argument_count=len(expression.argument_list), + ), + ) -def normalize_boolean_expression(counter, expression): - # TODO Unfake this - return fake_normalization(counter, expression) +def normalize_if_expression(counter, expression): + counter, condition_prestatements, condition_expression = normalize_expression( + counter, + expression.condition_expression, + ) -def normalize_infix_expression(counter, expression): - return { - 'multiplication_level': normalize_basic_infix_operation, - 'addition_level': normalize_basic_infix_operation, - 'comparison_level': normalize_comparison_expression, - 'and_level': normalize_boolean_expression, - 'or_level': normalize_boolean_expression, - }[expression.order](counter, expression) + counter, if_statement_list = normalize_statement_list( + counter, + expression.if_statement_list, + ) + counter, else_statement_list = normalize_statement_list( + counter, + expression.else_statement_list, + ) + + return ( + counter, + condition_prestatements, + NormalIfElseExpression( + condition_expression=condition_expression, + if_statement_list=if_statement_list, + else_statement_list=else_statement_list, + ), + ) def normalize_expression(counter, expression): return { - parsing.FurFunctionCallExpression: normalize_function_call_expression, - parsing.FurInfixExpression: normalize_infix_expression, - parsing.FurIntegerLiteralExpression: fake_normalization, - parsing.FurNegationExpression: fake_normalization, # TODO Don't fake this - parsing.FurParenthesizedExpression: fake_normalization, # TODO Don't fake this - parsing.FurStringLiteralExpression: fake_normalization, - parsing.FurSymbolExpression: fake_normalization, + desugaring.DesugaredBuiltinExpression: normalize_builtin_expression, + desugaring.DesugaredFunctionCallExpression: normalize_function_call_expression, + desugaring.DesugaredIfExpression: normalize_if_expression, + desugaring.DesugaredIntegerLiteralExpression: normalize_integer_literal_expression, + desugaring.DesugaredLambdaExpression: normalize_lambda_expression, + desugaring.DesugaredListLiteralExpression: normalize_list_literal_expression, + desugaring.DesugaredStringLiteralExpression: normalize_string_literal_expression, + desugaring.DesugaredStructureLiteralExpression: normalize_structure_literal_expression, + desugaring.DesugaredSymbolExpression: normalize_symbol_expression, + desugaring.DesugaredSymbolLiteralExpression: normalize_symbol_literal_expression, }[type(expression)](counter, expression) def normalize_expression_statement(counter, statement): - counter, prestatements, normalized = { - parsing.FurFunctionCallExpression: normalize_function_call_expression, - }[type(statement.expression)](counter, statement.expression) + # TODO Normalized will be a NormalVariableExpression, which will go unused + # for expression statements in every case except when it's a return + # statement. This cases warnings on C compilation. We should only generate + # this variable when it will be used on return. + counter, prestatements, normalized = normalize_expression(counter, statement.expression) return ( counter, @@ -212,21 +323,40 @@ def normalize_expression_statement(counter, statement): NormalExpressionStatement(expression=normalized), ) +def normalize_assignment_statement(counter, statement): + counter, prestatements, normalized_expression = normalize_expression(counter, statement.expression) + return ( + counter, + prestatements, + NormalAssignmentStatement( + target=statement.target, + expression=normalized_expression, + ), + ) + def normalize_statement(counter, statement): return { - parsing.FurExpressionStatement: normalize_expression_statement, - parsing.FurAssignmentStatement: fake_normalization, + desugaring.DesugaredAssignmentStatement: normalize_assignment_statement, + desugaring.DesugaredExpressionStatement: normalize_expression_statement, }[type(statement)](counter, statement) -def normalize(program): - counter = 0 - statement_list = [] +@util.force_generator(tuple) +def normalize_statement_list(counter, statement_list): + result_statement_list = [] - for statement in program.statement_list: + for statement in statement_list: counter, prestatements, normalized = normalize_statement(counter, statement) for s in prestatements: - statement_list.append(s) - statement_list.append(normalized) + result_statement_list.append(s) + result_statement_list.append(normalized) + + return ( + counter, + result_statement_list, + ) + +def normalize(program): + _, statement_list = normalize_statement_list(0, program.statement_list) return NormalProgram( statement_list=statement_list,