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cmd/compile: use more specific error message for assignment mismatch

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Show a more specifc error message in the form of "%d variables but %v
returns %d values" if an assignment mismatch occurs with a function
or method call on the right.

Fixes #27595

Change-Id: Ibc97d070662b08f150ac22d686059cf224e012ab
Reviewed-on: https://go-review.googlesource.com/135575
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
David Heuschmann 2018-09-15 13:04:59 +02:00 • committed by Robert Griesemer
parent 10aeb672e0
commit ae9c822f78
3 changed files with 31 additions and 7 deletions
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10
test/fixedbugs/issue26616.go
View file

@ -6,13 +6,13 @@
package p
var x int = three() // ERROR "1 variable but 3 values"
var x int = three() // ERROR "assignment mismatch: 1 variable but three returns 3 values"
func f() {
var _ int = three() // ERROR "1 variable but 3 values"
var a int = three() // ERROR "1 variable but 3 values"
a = three() // ERROR "1 variable but 3 values"
b := three() // ERROR "1 variable but 3 values"
var _ int = three() // ERROR "assignment mismatch: 1 variable but three returns 3 values"
var a int = three() // ERROR "assignment mismatch: 1 variable but three returns 3 values"
a = three() // ERROR "assignment mismatch: 1 variable but three returns 3 values"
b := three() // ERROR "assignment mismatch: 1 variable but three returns 3 values"
_, _ = a, b
}