48 lines
1.0 KiB
V
48 lines
1.0 KiB
V
module io
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// ReaderWriter represents a stream that can be read from and wrote to
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pub interface ReaderWriter {
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// from Reader
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read(mut buf []byte) ?int
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// from Writer
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write(buf []byte) ?int
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}
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// ReaderWriterImpl is a ReaderWriter that can be made from
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// a seperate reader and writer (see fn make_readerwriter)
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struct ReaderWriterImpl {
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r Reader
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w Writer
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}
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pub fn (mut r ReaderWriterImpl) read(mut buf []byte) ?int {
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return r.r.read(mut buf)
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}
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pub fn (mut r ReaderWriterImpl) write(buf []byte) ?int {
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return r.w.write(buf)
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}
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// make_readerwriter takes a rstream and a wstream and makes
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// an rwstream with them
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pub fn make_readerwriter(r Reader, w Writer) ReaderWriterImpl {
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return {
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r: r
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w: w
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}
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}
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struct Zzz_CoerceInterfaceTableGeneration {
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}
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fn (_ Zzz_CoerceInterfaceTableGeneration) write(buf []byte) ?int {
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}
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fn (_ Zzz_CoerceInterfaceTableGeneration) read(mut buf []byte) ?int {
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}
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fn zzz_reader_writer_coerce_compiler() {
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x := Zzz_CoerceInterfaceTableGeneration{}
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_ := make_readerwriter(x, x)
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}
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