Method: Object#respond_to?

Defined in:
vm_method.c

#respond_to?(symbol, include_all = false) ⇒ Boolean #respond_to?(string, include_all = false) ⇒ Boolean

Returns true if obj responds to the given method. Private and protected methods are included in the search only if the optional second parameter evaluates to true.

If the method is not implemented, as Process.fork on Windows, File.lchmod on GNU/Linux, etc., false is returned.

If the method is not defined, respond_to_missing? method is called and the result is returned.

When the method name parameter is given as a string, the string is converted to a symbol.

Overloads:

  • #respond_to?(symbol, include_all = false) ⇒ Boolean

    Returns:

    • (Boolean)
  • #respond_to?(string, include_all = false) ⇒ Boolean

    Returns:

    • (Boolean) 


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# File 'vm_method.c', line 2216

static VALUE
obj_respond_to(int argc, VALUE *argv, VALUE obj)
{
    VALUE mid, priv;
    ID id;
    rb_execution_context_t *ec = GET_EC();

    rb_scan_args(argc, argv, "11", &mid, &priv);
    if (!(id = rb_check_id(&mid))) {
	VALUE ret = basic_obj_respond_to_missing(ec, CLASS_OF(obj), obj,
						 rb_to_symbol(mid), priv);
	if (ret == Qundef) ret = Qfalse;
	return ret;
    }
    if (basic_obj_respond_to(ec, obj, id, !RTEST(priv)))
	return Qtrue;
    return Qfalse;
}