Partial implementation [skip-ci]

py2wasm/python.py

@@ -124,10 +124,8 @@ class Visitor:
             if not isinstance(arg.annotation, ast.Name):
                 raise NotImplementedError
 
-            print(class_lookup)
-            print(arg.annotation.id)
             if arg.annotation.id in class_lookup:
-                params.append((arg.arg, arg.annotation.id, ))
+                params.append((arg.arg, 'i32', ))
             else:
                 params.append((arg.arg, _parse_annotation(arg.annotation), ))
 
@@ -296,7 +294,7 @@ class Visitor:
             return self.visit_Name(wlocals, exp_type, node)
 
         if isinstance(node, ast.Attribute):
-            return [] # TODO
+            return self.visit_Attribute(wlocals, exp_type, node)
 
         raise NotImplementedError(node)
 
@@ -411,14 +409,46 @@ class Visitor:
             'Could not find function {}'.format(node.func.id)
 
         if isinstance(called_func_list[0], wasm.Class):
-            called_params = [
-                (x.name, x.type, )
-                for x in called_func_list[0].members
-            ]
-            called_result: Optional[str] = called_func_list[0].name
-        else:
-            called_params = called_func_list[0].params
-            called_result = called_func_list[0].result
+            return self.visit_Call_class(module, wlocals, exp_type, node, called_func_list[0])
+
+        return self.visit_Call_func(module, wlocals, exp_type, node, called_func_list[0])
+
+    def visit_Call_class(
+            self,
+            module: wasm.Module,
+            wlocals: WLocals,
+            exp_type: str,
+            node: ast.Call,
+            func: wasm.Class,
+        ) -> StatementGenerator:
+        """
+        Visits a Call node as (part of) an expression
+
+        This instantiates the class
+        """
+
+        # TODO: malloc call
+
+        yield wasm.Statement('i32.const 0')
+        yield wasm.Statement('i32.load')
+
+
+    def visit_Call_func(
+            self,
+            module: wasm.Module,
+            wlocals: WLocals,
+            exp_type: str,
+            node: ast.Call,
+            func: Union[wasm.Function, wasm.Import],
+        ) -> StatementGenerator:
+        """
+        Visits a Call node as (part of) an expression
+        """
+        assert isinstance(node.func, ast.Name)
+
+        called_name = node.func.id
+        called_params = func.params
+        called_result = func.result
 
         assert exp_type == called_result
 
@@ -470,6 +500,20 @@ class Visitor:
 
         raise NotImplementedError(exp_type)
 
+    def visit_Attribute(self, wlocals: WLocals, exp_type: str, node: ast.Attribute) -> StatementGenerator:
+        """
+        Visits an Attribute node as (part of) an expression
+        """
+
+        if not isinstance(node.value, ast.Name):
+            raise NotImplementedError
+
+        if not isinstance(node.ctx, ast.Load):
+            raise NotImplementedError
+
+        yield wasm.Statement('local.get', '$' + node.value.id)
+        yield wasm.Statement(exp_type + '.load', 'offset=0') # TODO: Calculate offset based on set struct
+
     def visit_Name(self, wlocals: WLocals, exp_type: str, node: ast.Name) -> StatementGenerator:
         """
         Visits a Name node as (part of) an expression

py2wasm/wasm.py

@@ -120,7 +120,8 @@ class Module:
         """
         Generates the text version
         """
-        return '(module\n  {}\n  {})\n'.format(
+        return '(module\n  (memory 1)\n  (data (memory 0) (i32.const 0) {})\n  {}\n  {})\n'.format(
+            '"\\\\04\\\\00\\\\00\\\\00"',
             '\n  '.join(x.generate() for x in self.imports),
             '\n  '.join(x.generate() for x in self.functions),
         )