X-Git-Url: https://code.kerkeslager.com/?a=blobdiff_plain;f=transformation.py;h=32b253ea233e989d0bdcf590a24d86367419436a;hb=80efbcfcd42da6061d0e31add5cc1e6fb17b2f93;hp=b6d21c85064bb6d154a09ed5a262c0560ec6e317;hpb=ec8ce6f417bad0e61e82462787fbb7d7dbe25ea0;p=fur diff --git a/transformation.py b/transformation.py index b6d21c8..32b253e 100644 --- a/transformation.py +++ b/transformation.py @@ -60,7 +60,8 @@ CFunctionCallExpression = collections.namedtuple( 'CFunctionCallExpression', [ 'name', - 'arguments', + 'argument_count', + 'argument_items', ], ) @@ -73,8 +74,24 @@ CSymbolAssignmentStatement = collections.namedtuple( ], ) -CVariableAssignmentStatement = collections.namedtuple( - 'CVariableAssignmentStatement', +CArrayVariableInitializationStatement = collections.namedtuple( + 'CArrayVariableInitializationStatement', + [ + 'variable', + 'items', + ], +) + +CVariableInitializationStatement = collections.namedtuple( + 'CVariableInitializationStatement', + [ + 'variable', + 'expression', + ], +) + +CVariableReassignmentStatement = collections.namedtuple( + 'CVariableReassignmentStatement', [ 'variable', 'expression', @@ -88,10 +105,36 @@ CExpressionStatement = collections.namedtuple( ], ) +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', @@ -150,72 +193,86 @@ BUILTINS = { def transform_variable_expression(accumulators, expression): return CVariableExpression(variable=expression.variable) -def transform_infix_expression(accumulators, expression): - if expression.order == 'comparison_level': - return transform_comparison_level_expression(accumulators, expression) +def transform_string_literal(accumulators, expression): + value = expression.value - INFIX_OPERATOR_TO_FUNCTION_NAME = { - '+': 'add', - '-': 'subtract', - '*': 'multiply', - '//': 'integerDivide', - '%': 'modularDivide', - 'and': 'and', - 'or': 'or', - } + try: + index = accumulators.string_literal_list.index(value) + except ValueError: + index = len(accumulators.string_literal_list) + accumulators.string_literal_list.append(value) - return CFunctionCallForFurInfixOperator( - name=INFIX_OPERATOR_TO_FUNCTION_NAME[expression.operator], - left=transform_expression(accumulators, expression.left), - right=transform_expression(accumulators, expression.right), - ) + return CStringLiteral(index=index, value=value) -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_symbol_expression(accumulators, expression): + if expression.value in ['true', 'false']: + return CConstantExpression(value=expression.value) - if isinstance(expression, parsing.FurNegationExpression): - return transform_negation_expression(accumulators, expression) + if expression.value not in accumulators.symbol_list: + symbol_list.append(expression.value) - if isinstance(expression, parsing.FurFunctionCallExpression): - return transform_function_call_expression(accumulators, expression) + return CSymbolExpression( + symbol=expression.value, + symbol_list_index=accumulators.symbol_list.index(expression.value), + ) - if isinstance(expression, parsing.FurSymbolExpression): - if expression.value in ['true', 'false']: - return CConstantExpression(value=expression.value) +CInfixOperatorDeclaration = collections.namedtuple( + 'CInfixOperatorDeclaration', + [ + 'name', + 'input_type', + 'result_type', + 'c_operator', + ], +) - if expression.value not in accumulators.symbol_list: - symbol_list.append(expression.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='||'), +} - return CSymbolExpression( - symbol=expression.value, - symbol_list_index=accumulators.symbol_list.index(expression.value), - ) +def transform_infix_expression(accumulators, expression): + if expression.order == 'comparison_level': + return transform_comparison_level_expression(accumulators, expression) - if isinstance(expression, parsing.FurStringLiteralExpression): - value = expression.value + accumulators.operator_set.add(INFIX_OPERATOR_TO_DECLARATION[expression.operator]) - try: - index = accumulators.string_literal_list.index(value) - except ValueError: - index = len(accumulators.string_literal_list) - accumulators.string_literal_list.append(value) + return CFunctionCallForFurInfixOperator( + name=INFIX_OPERATOR_TO_DECLARATION[expression.operator].name, + left=transform_expression(accumulators, expression.left), + right=transform_expression(accumulators, expression.right), + ) - return CStringLiteral(index=index, value=value) +def transform_integer_literal_expression(accumulators, expression): + return CIntegerLiteral(value=expression.value) - LITERAL_TYPE_MAPPING = { - parsing.FurIntegerLiteralExpression: CIntegerLiteral, - } +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) - if type(expression) in LITERAL_TYPE_MAPPING: - return LITERAL_TYPE_MAPPING[type(expression)](value=expression.value) +def transform_negation_expression(accumulators, expression): + return CNegationExpression( + value=transform_expression(accumulators, expression.internal_expression), + ) - # TODO Handle all possible types in this form +def transform_expression(accumulators, expression): + # TODO Clean up handlers for parsing expressions return { - parsing.FurInfixExpression: transform_infix_expression, # TODO Shouldn't need this + 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) @@ -233,49 +290,80 @@ def transform_symbol_assignment_statement(accumulators, assignment_statement): ), ) -def transform_negation_expression(accumulators, negation_expression): - return CNegationExpression( - value=transform_expression(accumulators, negation_expression.value), - ) - def transform_function_call_expression(accumulators, function_call): - # TODO Function should be a full expression 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 - ), - ) - - raise Exception() + # 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), + ) 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_variable_assignment_statement(accumulators, statement): - return CVariableAssignmentStatement( +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_symbol_assignment_statement, parsing.FurExpressionStatement: transform_expression_statement, - normalization.NormalVariableAssignmentStatement: transform_variable_assignment_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) @@ -283,6 +371,8 @@ Accumulators = collections.namedtuple( 'Accumulators', [ 'builtin_set', + 'function_definition_list', + 'operator_set', 'symbol_list', 'string_literal_list', ], @@ -291,6 +381,8 @@ Accumulators = collections.namedtuple( def transform(program): accumulators = Accumulators( builtin_set=set(), + function_definition_list=[], + operator_set=set(), symbol_list=[], string_literal_list=[], ) @@ -306,6 +398,8 @@ def transform(program): return CProgram( builtin_set=accumulators.builtin_set, + 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,