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https://github.com/golang/go
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72ad2f44ea
Added a new flag -G to run. Setting -G (as in: go run run.go -G) will run tests marked with "errorcheck" (and no other flags) also with the compiler using the new typechecker. Many tests don't pass yet (due to discrepancies in error messages). The top-level tests in the test directory which don't pass yet have been explicitly excluded, permitting to see the current status. Future CLs will bring error messages in sync and eventually all tests should pass. Change-Id: I7caf5eff413e173f68d092af4bbe458434718d74 Reviewed-on: https://go-review.googlesource.com/c/go/+/274313 Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
105 lines
2.5 KiB
Go
105 lines
2.5 KiB
Go
// errorcheck
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// Copyright 2016 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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// Test basic restrictions on type aliases.
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package p
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import (
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"reflect"
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. "reflect"
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)
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type T0 struct{}
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// Valid type alias declarations.
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type _ = T0
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type _ = int
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type _ = struct{}
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type _ = reflect.Value
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type _ = Value
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type (
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A0 = T0
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A1 = int
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A2 = struct{}
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A3 = reflect.Value
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A4 = Value
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A5 = Value
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N0 A0
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)
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// Methods can be declared on the original named type and the alias.
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func (T0) m1() {} // GCCGO_ERROR "previous"
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func (*T0) m1() {} // ERROR "method redeclared: T0\.m1|T0\.m1 redeclared in this block|redefinition of .m1."
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func (A0) m1() {} // ERROR "T0\.m1 redeclared in this block|redefinition of .m1."
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func (A0) m1() {} // ERROR "T0\.m1 redeclared in this block|redefinition of .m1."
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func (A0) m2() {}
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// Type aliases and the original type name can be used interchangeably.
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var _ A0 = T0{}
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var _ T0 = A0{}
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// But aliases and original types cannot be used with new types based on them.
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var _ N0 = T0{} // ERROR "cannot use T0{} \(type T0\) as type N0 in assignment|incompatible type"
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var _ N0 = A0{} // ERROR "cannot use T0{} \(type T0\) as type N0 in assignment|incompatible type"
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var _ A5 = Value{}
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var _ interface {
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m1()
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m2()
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} = T0{}
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var _ interface {
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m1()
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m2()
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} = A0{}
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func _() {
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type _ = T0
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type _ = int
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type _ = struct{}
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type _ = reflect.Value
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type _ = Value
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type (
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A0 = T0
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A1 = int
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A2 = struct{}
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A3 = reflect.Value
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A4 = Value
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A5 Value
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N0 A0
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)
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var _ A0 = T0{}
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var _ T0 = A0{}
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var _ N0 = T0{} // ERROR "cannot use T0{} \(type T0\) as type N0 in assignment|incompatible type"
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var _ N0 = A0{} // ERROR "cannot use T0{} \(type T0\) as type N0 in assignment|incompatible type"
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var _ A5 = Value{} // ERROR "cannot use reflect\.Value{} \(type reflect.Value\) as type A5 in assignment|incompatible type"
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}
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// Invalid type alias declarations.
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type _ = reflect.ValueOf // ERROR "reflect.ValueOf .*is not a type|expected type"
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func (A1) m() {} // ERROR "cannot define new methods on non-local type int|may not define methods on non-local type"
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func (A2) m() {} // ERROR "invalid receiver type"
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func (A3) m() {} // ERROR "cannot define new methods on non-local type reflect.Value|may not define methods on non-local type"
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func (A4) m() {} // ERROR "cannot define new methods on non-local type reflect.Value|may not define methods on non-local type"
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type B1 = struct{}
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func (B1) m() {} // ERROR "invalid receiver type"
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// TODO(gri) expand
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