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cmd/vet: tab symbol silently breaks go tags #15193

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aka-rider opened this issue Apr 8, 2016 · 3 comments

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commented Apr 8, 2016

Please answer these questions before submitting your issue. Thanks!

  1. What version of Go are you using (go version)?
    1.6
  2. What operating system and processor architecture are you using (go env)?
    All platforms
  3. What did you do?
    Suppose we have a struct with a tags.
    type Foo struct {
        Bar string    `db:"bar" json:"bar"`
    }

If there is a TAB symbol before the json, it makes the json tag unreadable (we get ^Ijson instead).

  1. What did you expect to see?
    • It would be nice to have a warning during go vet run or
    • It might be automatically corrected by the go fmt or
    • go can treat TAB in tags as a whitespace
  2. What did you see instead?
    json tag is silently ignored

@bradfitz bradfitz changed the title Tab symbol silently breaks go tags reflect, cmd/vet: tab symbol silently breaks go tags Apr 8, 2016

@bradfitz bradfitz added this to the Go1.7 milestone Apr 8, 2016

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commented Apr 8, 2016

https://golang.org/pkg/reflect/#StructTag is pretty clear that only space (U+0020 ' ') is valid whitespace, so this is probably a job for cmd/vet.

@bradfitz bradfitz added the Suggested label Apr 8, 2016

@bradfitz bradfitz changed the title reflect, cmd/vet: tab symbol silently breaks go tags cmd/vet: tab symbol silently breaks go tags Apr 8, 2016

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commented Apr 8, 2016

It already alerts on tab tags

type Foo struct {
    Bar string `db:"bar"    json:"bar"`
}
go vet
main.go:9: struct field tag `db:"bar"   json:"bar"` not compatible with reflect.StructTag.Get: bad syntax for struct tag key
exit status 1
go version
go version devel +c3b3e7b Fri Apr 8 21:06:39 2016 +0000 darwin/amd64
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commented Apr 8, 2016

Okay, so nothing to do here, then.

@bradfitz bradfitz closed this Apr 8, 2016

@bradfitz bradfitz removed this from the Go1.7 milestone Apr 8, 2016

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