code.kerkeslager.com Git - fur/blob - generation.py

   1 import jinja2
   2
   3 import transformation
   4
   5 ENV = jinja2.Environment(
   6     autoescape=jinja2.select_autoescape([]),
   7     loader=jinja2.FileSystemLoader('templates'),
   8     trim_blocks=True,
   9 )
  10
  11 def generate_integer_literal(c_integer_literal):
  12     return 'integerLiteral({})'.format(c_integer_literal.value)
  13
  14 def generate_string_literal(c_string_literal):
  15     return 'stringLiteral(STRING_LITERAL_LIST[{}] /* string: {} */)'.format(
  16         c_string_literal.index,
  17         repr(c_string_literal.value),
  18     )
  19
  20 def generate_symbol_expression(symbol_expression):
  21     return 'Environment_get(environment, SYMBOL_LIST[{}] /* symbol: {} */)'.format(
  22         symbol_expression.symbol_list_index,
  23         symbol_expression.symbol,
  24     )
  25
  26 def generate_variable_expression(expression):
  27     return expression.variable
  28
  29 def generate_function_call_for_fur_infix_operator(expression):
  30     return 'operator${}({}, {})'.format(
  31         expression.name,
  32         generate_expression(expression.left),
  33         generate_expression(expression.right),
  34     )
  35
  36 def generate_list_construct_expression(expression):
  37     return 'List_construct({})'.format(expression.allocate)
  38
  39 def generate_list_get_expression(expression):
  40     return 'List_get(&{}, {})'.format(
  41         generate_expression(expression.list_expression),
  42         generate_expression(expression.index_expression),
  43     )
  44
  45 def generate_expression(expression):
  46     return {
  47         transformation.CFunctionCallExpression: generate_function_call,
  48         transformation.CFunctionCallForFurInfixOperator: generate_function_call_for_fur_infix_operator,
  49         transformation.CIntegerLiteral: generate_integer_literal,
  50         transformation.CListConstructExpression: generate_list_construct_expression,
  51         transformation.CListGetExpression: generate_list_get_expression,
  52         transformation.CNegationExpression: generate_negation_expression,
  53         transformation.CStringLiteral: generate_string_literal,
  54         transformation.CSymbolExpression: generate_symbol_expression,
  55         transformation.CVariableExpression: generate_variable_expression,
  56     }[type(expression)](expression)
  57
  58 def generate_negation_expression(c_negation_expression):
  59     return 'operator$negate({})'.format(
  60         generate_expression(c_negation_expression.value)
  61     )
  62
  63 def generate_function_call(function_call):
  64     # This gets called twice, so we want to be sure it is efficient and without side effects
  65     assert isinstance(function_call.function_expression, transformation.CVariableExpression)
  66
  67     # TODO Check the type of the things being called
  68     function_expression = generate_variable_expression(function_call.function_expression)
  69     return '{}.instance.closure.call(environmentPool, {}.instance.closure.closed, {}, {})'.format(
  70         function_expression,
  71         function_expression,
  72         function_call.argument_count,
  73         # TODO This is just a single item containing a reference to the items list--make that clearer
  74         generate_expression(function_call.argument_items),
  75     )
  76
  77 def generate_expression_statement(statement):
  78     return 'Object_deinitialize(&({}));'.format(generate_expression(statement.expression))
  79
  80 def generate_symbol_assignment_statement(statement):
  81     return 'Environment_set(environment, SYMBOL_LIST[{}] /* symbol: {} */, {});'.format(
  82         statement.target_symbol_list_index,
  83         statement.target,
  84         generate_expression(statement.expression),
  85     )
  86
  87 def generate_array_variable_initialization_statement(statement):
  88     return 'Object {}[] = {{ {} }};'.format(
  89         statement.variable,
  90         ', '.join(generate_expression(i) for i in statement.items),
  91     )
  92
  93 def generate_variable_initialization_statement(statement):
  94     return 'Object {} = {};'.format(
  95         statement.variable,
  96         generate_expression(statement.expression),
  97     )
  98
  99 def generate_variable_reassignment_statement(statement):
 100     return '{} = {};'.format(
 101         statement.variable,
 102         generate_expression(statement.expression),
 103     )
 104
 105
 106 def indent(s):
 107     return '\n'.join(' ' * 2 + l for l in s.split('\n'))
 108
 109 def generate_if_else_statement(statement):
 110     # TODO Check that the argument is boolean
 111     condition_expression = '{}.instance.boolean'.format(
 112         generate_expression(statement.condition_expression),
 113     )
 114
 115     if len(statement.if_statement_list) == 0:
 116         condition_expression = '!({})'.format(condition_expression)
 117         if_statement_list = statement.else_statement_list
 118         else_statement_list = ()
 119     else:
 120         if_statement_list = statement.if_statement_list
 121         else_statement_list = statement.else_statement_list
 122
 123     generated_if_clause = 'if({})'.format(condition_expression)
 124
 125     if len(if_statement_list) == 0:
 126         generated_if_statement_list = ';'
 127     else:
 128         generated_if_statement_list = indent('\n{{\n{}\n}}'.format(
 129             indent('\n'.join(generate_statement(s) for s in if_statement_list)),
 130         ))
 131
 132     if len(else_statement_list) == 0:
 133         generated_else_statement_list = ''
 134     else:
 135         generated_else_statement_list = indent('\nelse\n{{\n{}\n}}'.format(
 136             indent('\n'.join(generate_statement(s) for s in else_statement_list)),
 137         ))
 138
 139     return generated_if_clause + generated_if_statement_list + generated_else_statement_list
 140
 141 def generate_function_declaration(statement):
 142     return 'Environment_set(environment, "{}", (Object){{ CLOSURE, (Instance)(Closure){{ environment, user${}$implementation }} }});'.format(statement.name, statement.name)
 143
 144 def generate_list_append_statement(statement):
 145     return 'List_append(&{}, {});'.format(
 146         generate_expression(statement.list_expression),
 147         generate_expression(statement.item_expression),
 148     )
 149
 150 def generate_statement(statement):
 151     return {
 152         transformation.CArrayVariableInitializationStatement: generate_array_variable_initialization_statement,
 153         transformation.CExpressionStatement: generate_expression_statement,
 154         transformation.CFunctionDeclaration: generate_function_declaration,
 155         transformation.CIfElseStatement: generate_if_else_statement,
 156         transformation.CListAppendStatement: generate_list_append_statement,
 157         transformation.CSymbolAssignmentStatement: generate_symbol_assignment_statement,
 158         transformation.CVariableInitializationStatement: generate_variable_initialization_statement,
 159         transformation.CVariableReassignmentStatement: generate_variable_reassignment_statement,
 160     }[type(statement)](statement)
 161
 162 def generate_function_definition(definition):
 163     template = ENV.get_template('function_definition.c')
 164     return template.render(
 165         name=definition.name,
 166         argument_name_list=definition.argument_name_list,
 167         statement_list=list(generate_statement(s) for s in definition.statement_list),
 168     )
 169     return definition
 170
 171 def generate(program):
 172     template = ENV.get_template('program.c')
 173     return template.render(
 174         builtins=tuple(sorted(program.builtin_set)),
 175         function_definition_list=list(generate_function_definition(fd) for fd in program.function_definition_list),
 176         infix_declarations=program.operator_declarations,
 177         statements=list(generate_statement(s) for s in program.statements),
 178         standard_libraries=list(sorted(program.standard_libraries)),
 179         string_literal_list=program.string_literal_list,
 180         symbol_list=program.symbol_list,
 181     )
 182
 183 if __name__ == '__main__':
 184     import unittest
 185
 186     unittest.main()