mirror of
https://github.com/golang/go
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78 lines
2.9 KiB
Go
78 lines
2.9 KiB
Go
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// 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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}
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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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}
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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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