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errors: Printer.Printf does not define semantics #30682

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rogpeppe opened this issue Mar 8, 2019 · 1 comment
Open

errors: Printer.Printf does not define semantics #30682

rogpeppe opened this issue Mar 8, 2019 · 1 comment

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@rogpeppe
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@rogpeppe rogpeppe commented Mar 8, 2019

$ go version
go version devel +91170d7201 Thu Mar 7 15:36:29 2019 +0000 linux/amd64

The new errors.Printer interface defines a Printf method, but does not document its semantics.
This means that when implementing Printer, it's not clear what form the format string should take.

Perhaps we should document that the format and args are as documented by fmt.Printf:

// Printf writes a formatted string. The format and arguments are as defined by fmt.Printf.
Printf(format string, args ...interface{})
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@andybons andybons commented Mar 9, 2019

@andybons andybons modified the milestones: Go1.13, Go1.14 Jul 8, 2019
@rsc rsc modified the milestones: Go1.14, Backlog Oct 9, 2019
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