Hi Brian, Thanks for the review. Your basic conclusion matches mine, that the ./main/main.go:46 and ./types.go are proven in the "go run" case, and disproven in the "go build" case.
Best, John On Wed, Aug 16, 2023 at 9:58 AM Brian Candler <b.cand...@pobox.com> wrote: > On Wednesday, 16 August 2023 at 14:05:49 UTC+1 John Pritchard wrote: > > I have a disparity between "go run" [ > https://go.dev/play/p/5mr5M0luZ9k?v=goprev] > and "go build" [https://github.com/syntelos/go-type-abstraction/tree/third]. > Using go version 1.21.0. > > > I don't quite understand where "go run" comes into this. In your Makefile > <https://github.com/syntelos/go-type-abstraction/blob/third/Makefile>, > both options use "go build". > > "make list" is doing something dubious: > > go_sources := $(shell ls *.go) > ... > list: main/main.go $(go_sources) > go build -o $@ $< > > That is, I think you're trying to compile "main/main.go" and "types.go" at > the same time into a single object file. But types.go is "package types" > whereas main.go is "package main". That should give you an error; if it > doesn't, that makes me suspect that go_sources is in fact empty. The "make > list" output you show in README.txt appears to confirm this: > > $ make > go build -o list main/main.go # <<< note that no additional sources are > listed on the command line > > In main.go, there is a pretty clear error that the compiler calls out in > line 46: > main/main.go:46:15: undefined: Abstract > > The corresponding source line > <https://github.com/syntelos/go-type-abstraction/blob/third/main/main.go#L46> > is: > var abstract Abstract = types.Init() > > and as far as I can see, it's correct: you have no type "Abstract" in > package main in main.go (in otherwise, you should be referring to > "types.Abstract") > > > -- > 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/a0716bee-a6b9-4ea7-b4a7-165c4ef43fabn%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/a0716bee-a6b9-4ea7-b4a7-165c4ef43fabn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CAD6mcO85tazOOrykPzp0XEg7FRfT7vKDLSk-fevrFm7sxMGaCQ%40mail.gmail.com.
