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mirror of https://github.com/golang/go synced 2024-11-14 06:10:24 -07:00
go/test/blank1.go
Robert Griesemer 91803a2df3 [dev.typeparams] merge: merge branch 'dev.regabi' into 'dev.typeparams'
The following files had merge conflicts and were merged manually:

	src/cmd/compile/fmtmap_test.go
	src/cmd/compile/internal/gc/noder.go
	src/go/parser/error_test.go
	test/assign.go
	test/chan/perm.go
	test/fixedbugs/issue22822.go
	test/fixedbugs/issue4458.go
	test/init.go
	test/interface/explicit.go
	test/map1.go
	test/method2.go

The following files had manual changes to make tests pass:

	test/run.go
	test/used.go
	src/cmd/compile/internal/types2/stdlib_test.go

Change-Id: Ia495aaaa80ce321ee4ec2a9105780fbe913dbd4c
2020-12-14 12:13:36 -08:00

33 lines
724 B
Go

// errorcheck
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test that incorrect uses of the blank identifier are caught.
// Does not compile.
package _ // ERROR "invalid package name"
var t struct {
_ int
}
func (x int) _() { // ERROR "methods on non-local type"
println(x)
}
type T struct {
_ []int
}
func main() {
_() // ERROR "cannot use .* as value"
x := _+1 // ERROR "cannot use .* as value"
_ = x
_ = t._ // ERROR "cannot refer to blank field|invalid use of|t._ undefined"
var v1, v2 T
_ = v1 == v2 // ERROR "cannot be compared|non-comparable|cannot compare v1 == v2"
}