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 'operator${}({}, {})'.format(
54 generate_expression(expression.left),
55 generate_expression(expression.right),
59 transformation.CVariableExpression: generate_variable_expression,
60 }[type(expression)](expression)
62 def generate_negation_expression(c_negation_expression):
63 return 'operator$negate({})'.format(
64 generate_expression(c_negation_expression.value)
67 def generate_function_call(function_call):
68 return 'Environment_get(environment, "{}").instance.closure(environment, {}, {})'.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 this at an earlier pass
77 if isinstance(statement.expression, transformation.CVariableExpression):
80 # TODO Do we need to garbage collect the results of arbitrary statements?
81 return '{};'.format(generate_expression(statement.expression))
83 def generate_symbol_assignment_statement(c_assignment_statement):
84 return 'Environment_set(environment, SYMBOL_LIST[{}] /* symbol: {} */, {});'.format(
85 c_assignment_statement.target_symbol_list_index,
86 c_assignment_statement.target,
87 generate_expression(c_assignment_statement.expression),
90 def generate_array_variable_initialization_statement(statement):
91 return 'Object {}[] = {{ {} }};'.format(
93 ', '.join(generate_expression(i) for i in statement.items),
96 def generate_variable_initialization_statement(statement):
97 return 'Object {} = {};'.format(
99 generate_expression(statement.expression),
102 def generate_variable_reassignment_statement(statement):
103 return '{} = {};'.format(
105 generate_expression(statement.expression),
110 return '\n'.join(' ' * 2 + l for l in s.split('\n'))
112 def generate_if_else_statement(statement):
113 # TODO Check that the argument is boolean
114 condition_expression = '{}.instance.boolean'.format(
115 generate_expression(statement.condition_expression),
118 if len(statement.if_statements) == 0:
119 condition_expression = '!({})'.format(condition_expression)
120 if_statements = statement.else_statements
123 if_statements = statement.if_statements
124 else_statements = statement.else_statements
126 generated_if_clause = 'if({})'.format(condition_expression)
128 if len(if_statements) == 0:
129 generated_if_statements = ';'
131 generated_if_statements = indent('\n{{\n{}\n}}'.format(
132 indent('\n'.join(generate_statement(s) for s in if_statements)),
135 if len(else_statements) == 0:
136 generated_else_statements = ''
138 generated_else_statements = indent('\nelse\n{{\n{}\n}}'.format(
139 indent('\n'.join(generate_statement(s) for s in else_statements)),
142 return generated_if_clause + generated_if_statements + generated_else_statements
144 def generate_function_declaration(statement):
145 return 'Environment_set(environment, "{}", user${});'.format(statement.name, statement.name)
147 def generate_statement(statement):
149 transformation.CExpressionStatement: generate_expression_statement,
150 transformation.CFunctionDeclaration: generate_function_declaration,
151 transformation.CIfElseStatement: generate_if_else_statement,
152 transformation.CSymbolAssignmentStatement: generate_symbol_assignment_statement,
153 transformation.CArrayVariableInitializationStatement: generate_array_variable_initialization_statement,
154 transformation.CVariableInitializationStatement: generate_variable_initialization_statement,
155 transformation.CVariableReassignmentStatement: generate_variable_reassignment_statement,
156 }[type(statement)](statement)
158 def generate(program):
159 template = ENV.get_template('program.c')
160 return template.render(
161 builtins=tuple(sorted(program.builtin_set)),
162 function_definition_list=program.function_definition_list,
163 generate_statement=generate_statement,
164 infix_declarations=program.operator_declarations,
165 statements=program.statements,
166 standard_libraries=list(sorted(program.standard_libraries)),
167 string_literal_list=program.string_literal_list,
168 symbol_list=program.symbol_list,
171 if __name__ == '__main__':