type go/ast.ChanDir

4 uses

	go/ast (current package)
		ast.go#L409: type ChanDir int
		ast.go#L412: 	SEND ChanDir = 1 << iota
		ast.go#L462: 		Dir   ChanDir   // channel direction

	golang.org/x/pkgsite/internal/godoc
		encode_ast.gen.go#L745: 			x.Dir = ast.ChanDir(d.DecodeInt())

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