}

	var p noder
	var nopos syntax.Pos
	for _, tt := range tests {

		p.err = make(chan syntax.Error)
		gotch := make(chan [][]string, 1)
		go func() {
			p.pragcgobuf = nil
			p.pragcgo(nopos, tt.in)
			if p.pragcgobuf != nil {
				gotch <- p.pragcgobuf
			}
		}()

		select {
		case e := <-p.err:
			want := tt.want[0]
			if e.Error() != want {
				t.Errorf("pragcgo(%q) = %q; want %q", tt.in, e, want)

	}
	return filename
}

// noder transforms package syntax's AST into a Node tree.
type noder struct {
	file       *syntax.File
	linknames  []linkname
	pragcgobuf [][]string
	err        chan syntax.Error
}

// linkname records a //go:linkname directive.
type linkname struct {
	pos    syntax.Pos
	local  string
	remote string
}