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8c5e8a38df
As with changes in prior CLs, we don't suppress legitimate "declared but not used" errors anymore simply because the respective variables are used in incorrect assignments, unrelated to the variables in question. Adjust several (ancient) tests accordingly. Change-Id: I5826393264d9d8085c64777a330d4efeb735dd2d Reviewed-on: https://go-review.googlesource.com/c/go/+/478716 Reviewed-by: Robert Griesemer <gri@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Robert Griesemer <gri@google.com> Reviewed-by: Robert Findley <rfindley@google.com> Run-TryBot: Robert Griesemer <gri@google.com>
86 lines
3.0 KiB
Go
86 lines
3.0 KiB
Go
// errorcheck
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// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package p
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func _(a, b, c int) {
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_ = a
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_ = a, b // ERROR "assignment mismatch: 1 variable but 2 values"
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_ = a, b, c // ERROR "assignment mismatch: 1 variable but 3 values"
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_, _ = a // ERROR "assignment mismatch: 2 variables but 1 value"
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_, _ = a, b
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_, _ = a, b, c // ERROR "assignment mismatch: 2 variables but 3 values"
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_, _, _ = a // ERROR "assignment mismatch: 3 variables but 1 value"
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_, _, _ = a, b // ERROR "assignment mismatch: 3 variables but 2 values"
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_, _, _ = a, b, c
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}
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func f1() int
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func f2() (int, int)
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func f3() (int, int, int)
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func _() {
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_ = f1()
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_ = f2() // ERROR "assignment mismatch: 1 variable but f2 returns 2 values"
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_ = f3() // ERROR "assignment mismatch: 1 variable but f3 returns 3 values"
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_, _ = f1() // ERROR "assignment mismatch: 2 variables but f1 returns 1 value"
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_, _ = f2()
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_, _ = f3() // ERROR "assignment mismatch: 2 variables but f3 returns 3 values"
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_, _, _ = f1() // ERROR "assignment mismatch: 3 variables but f1 returns 1 value"
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_, _, _ = f2() // ERROR "assignment mismatch: 3 variables but f2 returns 2 values"
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_, _, _ = f3()
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// test just a few := cases as they use the same code as the = case
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a1 := f3() // ERROR "assignment mismatch: 1 variable but f3 returns 3 values"
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a2, b2 := f1() // ERROR "assignment mismatch: 2 variables but f1 returns 1 value"
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a3, b3, c3 := f2() // ERROR "assignment mismatch: 3 variables but f2 returns 2 values"
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_ = a1
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_, _ = a2, b2
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_, _, _ = a3, b3, c3
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}
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type T struct{}
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func (T) f1() int
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func (T) f2() (int, int)
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func (T) f3() (int, int, int)
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func _(x T) {
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_ = x.f1()
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_ = x.f2() // ERROR "assignment mismatch: 1 variable but .\.f2 returns 2 values"
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_ = x.f3() // ERROR "assignment mismatch: 1 variable but .\.f3 returns 3 values"
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_, _ = x.f1() // ERROR "assignment mismatch: 2 variables but .\.f1 returns 1 value"
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_, _ = x.f2()
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_, _ = x.f3() // ERROR "assignment mismatch: 2 variables but .\.f3 returns 3 values"
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_, _, _ = x.f1() // ERROR "assignment mismatch: 3 variables but .\.f1 returns 1 value"
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_, _, _ = x.f2() // ERROR "assignment mismatch: 3 variables but .\.f2 returns 2 values"
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_, _, _ = x.f3()
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// test just a few := cases as they use the same code as the = case
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a1 := x.f3() // ERROR "assignment mismatch: 1 variable but .\.f3 returns 3 values"
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a2, b2 := x.f1() // ERROR "assignment mismatch: 2 variables but .\.f1 returns 1 value"
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a3, b3, c3 := x.f2() // ERROR "assignment mismatch: 3 variables but .\.f2 returns 2 values"
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_ = a1
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_, _ = a2, b2
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_, _, _ = a3, b3, c3
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}
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// some one-off cases
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func _() {
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_ = (f2)
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_ = f1(), 2 // ERROR "assignment mismatch: 1 variable but 2 values"
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_, _ = (f1()), f2() // ERROR "multiple-value f2\(\) .*in single-value context"
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_, _, _ = f3(), 3 // ERROR "assignment mismatch: 3 variables but 2 values|multiple-value f3\(\) .*in single-value context"
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}
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