Hi, Note that this has nothing to do with casting. `after` and `before` are not pointers, they're plain old `int` variables (or `DefinedInt` in your example but that does not change anything). When you do `after := whatever`, you're declaring (and assigning) a new variable `after` to hold the same value as `before`, which does not mean in any way that `after` and ` before` will have the same memory address. Look at the following code: https://go.dev/play/p/yacBcIWpiar
If you want variables pointing to the same memory address, you have to use pointers explicitly, as in: https://go.dev/play/p/hcse5k-vD4E Hope that helps! On Tue, Oct 10, 2023 at 2:03 PM Tomoya Kuwayama <tkuwayama@nature.global> wrote: > Hello! > > In golang spec, if it cast the variable, pointer that cast returns is > changed? > Consider the following code. Do the pointers `before` and `after` hold > different values? > > ```go > package main > > import "fmt" > > type DefinedInt int > > func main() { > var before int > before = 1 > > after := DefinedInt(before) > > fmt.Printf("before: %p\n", &before) > fmt.Printf("after : %p\n", &after) > } > ``` > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/8677311d-a056-41f6-a81c-ad1286c71d8an%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/8677311d-a056-41f6-a81c-ad1286c71d8an%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- *Soigner, c’est bien plus qu’un métier.**#PlusQuUnMétier <https://www.doctolib.fr/sante/bienplusquunmetier/>* _The information transmitted, including attachments, is intended only for _the _person(s) or _entity to which it is addressed and may contain _confidential and/or privileged material. Any _review, retransmission, _dissemination or other use of, or taking of any action in reliance _upon _this information by persons or entities other than the intended recipient _is prohibited. If _you received this in error, please contact the sender and _destroy any copies of this _information. _____________ -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAMaoJVnZRnOsP7thLbagGWhECWgQXvbcD8OZsjKbec9xV8h2hQ%40mail.gmail.com.
