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go/types: allows multiple-value in switch and case #11687

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dvyukov opened this issue Jul 12, 2015 · 1 comment
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go/types: allows multiple-value in switch and case #11687

dvyukov opened this issue Jul 12, 2015 · 1 comment
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@dvyukov
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@dvyukov dvyukov commented Jul 12, 2015

gotype successfully compiles the following program:

package n

func f() (int, int) {
    return 0, 0
}

func g() {
    switch f() {
    default:
    //case f():
    }
}

gc says:

go.go:8: multiple-value f() in single-value context

which looks like the right thing.

Also if you uncomment the case, gotype says:

go.go:10:7: cannot compare f() == f() (operator == not defined for (int, int))

gotype should reject f() in switch case at earlier stage and say something along the lines of the gc error message (the issue is not with comparison, it is with multiple-value in single-value context).

on commit af81789

@dvyukov dvyukov changed the title go/type: allows multiple-value in switch and case go/types: allows multiple-value in switch and case Jul 12, 2015
@ianlancetaylor ianlancetaylor added this to the Go1.6 milestone Jul 12, 2015
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@gopherbot gopherbot commented Jul 28, 2015

CL https://golang.org/cl/12713 mentions this issue.

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@griesemer griesemer closed this in f1b5bb9 Aug 21, 2015
@golang golang locked and limited conversation to collaborators Aug 22, 2016
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