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go/test/blank1.go
Håvard Haugen 8a34cf7ee0 cmd/compile: don't allow blank method declarations on builtins
Move test for isblank into addmethod so that most of the type checking
for methods is also performed for blank methods.

Fixes #11366.

Change-Id: I13d554723bf96d906d0b3ff390d7b7c87c1a5020
Reviewed-on: https://go-review.googlesource.com/16866
Reviewed-by: Robert Griesemer <gri@golang.org>
2015-12-02 18:26:38 +00:00

33 lines
703 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 identifer are caught.
// Does not compile.
package _ // ERROR "invalid package name _"
var t struct {
_ int
}
func (x int) _() { // ERROR "cannot define new 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"
var v1, v2 T
_ = v1 == v2 // ERROR "cannot be compared|non-comparable"
}