Allow users to define new zero-argument functions

[fur] / generation.py

diff --git a/generation.py b/generation.py
index 1e1243a..c058f91 100644 (file)
--- a/generation.py
+++ b/generation.py
@@ -49,7 +49,7 @@ def generate_expression(expression):
         return LITERAL_TYPE_MAPPING[type(expression)](expression)
 
     if isinstance(expression, transformation.CFunctionCallForFurInfixOperator):
-        return 'builtin${}({}, {})'.format(
+        return 'operator${}({}, {})'.format(
             expression.name,
             generate_expression(expression.left),
             generate_expression(expression.right),
@@ -60,12 +60,12 @@ def generate_expression(expression):
     }[type(expression)](expression)
 
 def generate_negation_expression(c_negation_expression):
-    return 'builtin$negate({})'.format(
+    return 'operator$negate({})'.format(
         generate_expression(c_negation_expression.value)
     )
 
 def generate_function_call(function_call):
-    return '{}({}, {})'.format(
+    return 'Environment_get(environment, "{}").instance.closure({}, {})'.format(
         function_call.name,
         function_call.argument_count,
         # TODO This is just a single item containing a reference to the items list--make that clearer
@@ -113,9 +113,13 @@ def generate_if_else_statement(statement):
         indent('\n'.join(generate_statement(s) for s in statement.else_statements)),
     )
 
+def generate_function_declaration(statement):
+    return 'Environment_set(environment, "{}", user${});'.format(statement.name, statement.name)
+
 def generate_statement(statement):
     return {
         transformation.CExpressionStatement: generate_expression_statement,
+        transformation.CFunctionDeclaration: generate_function_declaration,
         transformation.CIfElseStatement: generate_if_else_statement,
         transformation.CSymbolAssignmentStatement: generate_symbol_assignment_statement,
         transformation.CArrayVariableInitializationStatement: generate_array_variable_initialization_statement,
@@ -126,8 +130,10 @@ def generate_statement(statement):
 def generate(program):
     template = ENV.get_template('program.c')
     return template.render(
-        builtins=list(sorted(program.builtin_set)),
-        statements=[generate_statement(statement) for statement in program.statements],
+        builtins=tuple(sorted(program.builtin_set)),
+        function_definition_list=program.function_definition_list,
+        generate_statement=generate_statement,
+        statements=program.statements,
         standard_libraries=list(sorted(program.standard_libraries)),
         string_literal_list=program.string_literal_list,
         symbol_list=program.symbol_list,