On Wed, Apr 26, 2023 at 4:21 PM Chris Zhang <mayerche...@gmail.com> wrote: > > I am trying to dump certain IRNode in src/cmd/internal/ssagen/ssa.go file in > 1.19. Suppose n is an IRNode, then I tried `fmt.Printf(“%+v”, n)`, and I can > see something like > > . NAME-strong.u esc(no) Class:PPARAM Offset:24 OnStack Used uint64 tc(1) # > itoa.go:88:29 > > I am interested in the last part “itoa.go:88:29” and I wonder how to get this > substring. Based on my understanding, “%+v” basically print all fields in a > struct. Also seems like these two statements are equivalent: > `fmt.Printf(“%+v”, n)` versus > `fmt.Printf(“%+v”, n.Name())`. I’ve tried to dump all fields for n.Name() but > still cannot see “itoa.go…”. > > Any thoughts on how to get this substring or what's the actual step of > converting `n.Name()` into the output string?
It's more complicated than what you describe because most ir.Node implementations implement the fmt.Formatter interface, so the Format method is called to implement %+v. Anyhow, the itoa.go:88:28 is almost certainly coming from the n.Pos() value. At HEAD this is being printed by the code at https://go.googlesource.com/go/+/refs/heads/master/src/cmd/compile/internal/ir/fmt.go#1080 . Ian -- 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/CAOyqgcWhrcevOBF3NDuoWB94JJJhFSJCJJ2K7SZvnwbe-AmH3A%40mail.gmail.com.
