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8d4b685ab5
Quietly drop duplicate methods inherited from embedded interfaces if they have an identical signature to existing methods. Updates #6977. Change-Id: I144151cb7d99695f12b555c0db56207993c56284 Reviewed-on: https://go-review.googlesource.com/c/go/+/187519 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
// errorcheck
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// Copyright 2019 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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import "io"
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// Alan's initial report.
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type I interface { f(); String() string }
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type J interface { g(); String() string }
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type IJ1 = interface { I; J }
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type IJ2 = interface { f(); g(); String() string }
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var _ = (*IJ1)(nil) == (*IJ2)(nil) // static assert that IJ1 and IJ2 are identical types
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// The canonical example.
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type ReadWriteCloser interface { io.ReadCloser; io.WriteCloser }
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// Some more cases.
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type M interface { m() }
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type M32 interface { m() int32 }
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type M64 interface { m() int64 }
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type U1 interface { m() }
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type U2 interface { m(); M }
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type U3 interface { M; m() }
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type U4 interface { M; M; M }
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type U5 interface { U1; U2; U3; U4 }
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type U6 interface { m(); m() } // ERROR "duplicate method m"
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type U7 interface { M32; m() } // ERROR "duplicate method m"
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type U8 interface { m(); M32 } // ERROR "duplicate method m"
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type U9 interface { M32; M64 } // ERROR "duplicate method m"
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