method

to_s

v2_6_3 - Show latest stable - 0 notes - Class: Method

to_s() public

Returns a human-readable description of the underlying method.

"cat".method(:count).inspect   #=> "#<Method: String#count>"
(1..3).method(:map).inspect    #=> "#<Method: Range(Enumerable)#map>"

In the latter case, the method description includes the “owner” of the original method (Enumerable module, which is included into Range).

Show source

static VALUE
method_inspect(VALUE method)
{
    struct METHOD *data;
    VALUE str;
    const char *sharp = "#";
    VALUE mklass;
    VALUE defined_class;

    TypedData_Get_Struct(method, struct METHOD, &method_data_type, data);
    str = rb_sprintf("#<% "PRIsVALUE": ", rb_obj_class(method));
    OBJ_INFECT_RAW(str, method);

    mklass = data->klass;

    if (data->me->def->type == VM_METHOD_TYPE_ALIAS) {
        defined_class = data->me->def->body.alias.original_me->owner;
    }
    else {
        defined_class = method_entry_defined_class(data->me);
    }

    if (RB_TYPE_P(defined_class, T_ICLASS)) {
        defined_class = RBASIC_CLASS(defined_class);
    }

    if (FL_TEST(mklass, FL_SINGLETON)) {
        VALUE v = rb_ivar_get(mklass, attached);

        if (data->recv == Qundef) {
            rb_str_buf_append(str, rb_inspect(mklass));
        }
        else if (data->recv == v) {
            rb_str_buf_append(str, rb_inspect(v));
            sharp = ".";
        }
        else {
            rb_str_buf_append(str, rb_inspect(data->recv));
            rb_str_buf_cat2(str, "(");
            rb_str_buf_append(str, rb_inspect(v));
            rb_str_buf_cat2(str, ")");
            sharp = ".";
        }
    }
    else {
        rb_str_buf_append(str, rb_inspect(mklass));
        if (defined_class != mklass) {
            rb_str_catf(str, "(% "PRIsVALUE")", defined_class);
        }
    }
    rb_str_buf_cat2(str, sharp);
    rb_str_append(str, rb_id2str(data->me->called_id));
    if (data->me->called_id != data->me->def->original_id) {
        rb_str_catf(str, "(%"PRIsVALUE")",
                    rb_id2str(data->me->def->original_id));
    }
    if (data->me->def->type == VM_METHOD_TYPE_NOTIMPLEMENTED) {
        rb_str_buf_cat2(str, " (not-implemented)");
    }
    rb_str_buf_cat2(str, ">");

    return str;
}

to_s

Related methods