public object visit_super(SuperExpr super_expr)
{
// Get the superclass and the 'this' object
WavyClass superclass = (WavyClass)local_scope.get("super");
WavyObject obj = (WavyObject)local_scope.get("this");
// Get the method from the superclass
WavyFunction method = superclass.find_method(obj, (string)super_expr.identifier.value);
if (method == null)
{
throw new RuntimeException("Undefined method of superclass '" + super_expr.identifier.value + "'");
}
return(method);
}
public object get(string identifier)
{
// Check class methods
WavyFunction method = the_class.find_method(this, identifier);
if (method != null)
{
return(method);
}
// Check object members
object member = find_member(identifier);
if (member != null)
{
return(member);
}
throw new RuntimeException("Class member/method cannot be found '" + identifier + "'");
}
public void visit_trycatch(TryCatchStmt trycatch_stmt)
{
try
{
execute(trycatch_stmt.try_body);
}catch (WavyException exception)
{
WavyFunction function = new WavyFunction(trycatch_stmt.catch_body, this.local_scope, false);
// We want to create a new instance of a WavyException here
Callable exception_class = (Callable)WavyNamespace.get_var_in_namespace(this.local_scope, "exception", "Exception");
function.call(this,
new List <object>()
{
exception_class.call(this, new List <object>()
{
"[Caught Exception] " + exception.errror_msg
})
}
);
}
}
public void visit_class(ClassStmt class_stmt)
{
object superclass = null;
// Check if we have a superclass, and if so, evaluate that
if (class_stmt.superclass != null)
{
superclass = evaluate(class_stmt.superclass);
if (!(superclass is WavyClass))
{
throw new RuntimeException("Superclass must be a class type");
}
}
this.local_scope.define((string)class_stmt.name.value, null);
if (class_stmt.superclass != null)
{
// Create a new scope for the superclass class
local_scope = new Scope(local_scope);
// Define super as the superclass
local_scope.define("super", superclass);
}
// Create a dictionary of methods for the class
Dictionary <string, WavyFunction> methods = new Dictionary <string, WavyFunction>();
foreach (FunctionStmt method in class_stmt.methods)
{
bool is_constructor = ((string)method.name.value) == (string)class_stmt.name.value;
WavyFunction function = new WavyFunction(method, this.local_scope, is_constructor);
methods.Add((string)method.name.value, function);
}
// Create the class object and assign it to the scope
WavyClass p_class = new WavyClass((string)class_stmt.name.value, (WavyClass)superclass, methods);
if (superclass != null)
{
// Reset the scope
local_scope = local_scope.enclosing_scope;
}
local_scope.assign(class_stmt.name, p_class);
}
public void visit_function(FunctionStmt function_stmt)
{
WavyFunction func = new WavyFunction(function_stmt, this.local_scope, false);
local_scope.define((string)function_stmt.name.value, func);
}