5 ENV = jinja2.Environment(
6 autoescape=jinja2.select_autoescape([]),
7 loader=jinja2.FileSystemLoader('templates'),
11 def generate_integer_literal(c_integer_literal):
12 return 'integerLiteral({})'.format(c_integer_literal.value)
14 def generate_string_literal(c_string_literal):
15 return 'stringLiteral(STRING_LITERAL_LIST[{}])'.format(c_string_literal.index)
17 CONSTANT_EXPRESSION_MAPPING = {
22 def generate_constant_expression(c_constant_expression):
23 return CONSTANT_EXPRESSION_MAPPING[c_constant_expression.value]
25 def generate_symbol_expression(c_symbol_expression):
26 return 'Environment_get(environment, SYMBOL_LIST[{}] /* symbol: {} */)'.format(
27 c_symbol_expression.symbol_list_index,
28 c_symbol_expression.symbol,
31 def generate_variable_expression(expression):
32 return expression.variable
34 def generate_expression(expression):
35 if isinstance(expression, transformation.CNegationExpression):
36 return generate_negation_expression(expression)
38 if isinstance(expression, transformation.CFunctionCallExpression):
39 return generate_function_call(expression)
41 LITERAL_TYPE_MAPPING = {
42 transformation.CIntegerLiteral: generate_integer_literal,
43 transformation.CStringLiteral: generate_string_literal,
44 transformation.CConstantExpression: generate_constant_expression,
45 transformation.CSymbolExpression: generate_symbol_expression,
48 if type(expression) in LITERAL_TYPE_MAPPING:
49 return LITERAL_TYPE_MAPPING[type(expression)](expression)
51 if isinstance(expression, transformation.CFunctionCallForFurInfixOperator):
52 return 'builtin${}({}, {})'.format(
54 generate_expression(expression.left),
55 generate_expression(expression.right),
59 transformation.CVariableExpression: generate_variable_expression,
60 }[type(expression)](expression)
62 def generate_negation_expression(c_negation_expression):
63 return 'builtin$negate({})'.format(
64 generate_expression(c_negation_expression.value)
67 def generate_function_call(function_call):
68 return '{}({}, {})'.format(
70 function_call.argument_count,
71 # TODO This is just a single item containing a reference to the items list--make that clearer
72 generate_expression(function_call.argument_items),
75 def generate_expression_statement(statement):
76 # TODO Do we need to garbage collect the results of arbitrary statements?
77 return '{};'.format(generate_expression(statement.expression))
79 def generate_symbol_assignment_statement(c_assignment_statement):
80 return 'Environment_set(environment, SYMBOL_LIST[{}] /* symbol: {} */, {});'.format(
81 c_assignment_statement.target_symbol_list_index,
82 c_assignment_statement.target,
83 generate_expression(c_assignment_statement.expression),
86 def generate_array_variable_initialization_statement(statement):
87 return 'Object {}[] = {{ {} }};'.format(
89 ', '.join(generate_expression(i) for i in statement.items),
92 def generate_variable_initialization_statement(statement):
93 return 'Object {} = {};'.format(
95 generate_expression(statement.expression),
98 def generate_variable_reassignment_statement(statement):
99 return '{} = {};'.format(
101 generate_expression(statement.expression),
106 return '\n'.join(' ' * 2 + l for l in s.split('\n'))
108 def generate_if_else_statement(statement):
109 # TODO Check that the argument is boolean
110 return 'if({}.instance.boolean)\n{{\n{}\n}}\nelse\n{{\n{}\n}}'.format(
111 generate_expression(statement.condition_expression),
112 indent('\n'.join(generate_statement(s) for s in statement.if_statements)),
113 indent('\n'.join(generate_statement(s) for s in statement.else_statements)),
116 def generate_statement(statement):
118 transformation.CExpressionStatement: generate_expression_statement,
119 transformation.CIfElseStatement: generate_if_else_statement,
120 transformation.CSymbolAssignmentStatement: generate_symbol_assignment_statement,
121 transformation.CArrayVariableInitializationStatement: generate_array_variable_initialization_statement,
122 transformation.CVariableInitializationStatement: generate_variable_initialization_statement,
123 transformation.CVariableReassignmentStatement: generate_variable_reassignment_statement,
124 }[type(statement)](statement)
126 def generate(program):
127 template = ENV.get_template('program.c')
128 return template.render(
129 builtins=list(sorted(program.builtin_set)),
130 statements=[generate_statement(statement) for statement in program.statements],
131 standard_libraries=list(sorted(program.standard_libraries)),
132 string_literal_list=program.string_literal_list,
133 symbol_list=program.symbol_list,
136 if __name__ == '__main__':