type go/ast.ChanDir

4 uses

	go/ast (current package)
		ast.go#L435: type ChanDir int
		ast.go#L438: 	SEND ChanDir = 1 << iota
		ast.go#L488: 		Dir   ChanDir   // channel direction

	golang.org/x/tools/internal/typesinternal
		zerovalue.go#L250: 		dir := ast.ChanDir(t.Dir())

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