object LookupVariableByResolution(Token name, Expr expr)
{
if (!_scopeMap.ContainsKey(expr))
{
return(GlobalEnvironment.Get(name));
}
else
{
var distance = _scopeMap[expr];
return(_currentEnvironment.GetAt(distance, name));
}
}
public object Call(InterpretingVisitor interpreter, List <object> arguments)
{
var environment = new LoxEnvironment(_closure);
for (var i = 0; i < Arity(); i++)
{
environment.Define(_functionStmt.Params[i].Lexeme, arguments[i]);
}
try {
interpreter.Execute(_functionStmt.Body, environment);
} catch (LoxReturnException ex) {
if (_isInitializer)
{
throw new LoxReturnException(_closure.GetAt(0, new Token(TokenType.This, "this", null, 0)));
}
throw;
}
return(null);
}
