Bug 1688791 - Part 10: Remove XDRDecoderBase and XDREncoder aliases. r=tcampbell

  XDRResult codeCharsZ(XDRTranscodeString<char16_t>& buffer);

};

using XDREncoder = XDRState<XDR_ENCODE>;

using XDRDecoderBase = XDRState<XDR_DECODE>;

/*

 * The structure of the Stencil XDR buffer is:

 *

 * The decoded stencils borrow the input `buffer`/`range`, and the consumer

 * has to keep the buffer alive while the decoded stencils are alive.

 */

class XDRStencilDecoder : public XDRDecoderBase {

class XDRStencilDecoder : public XDRState<XDR_DECODE> {

  using Base = XDRState<XDR_DECODE>;

 public:

  XDRStencilDecoder(JSContext* cx, JS::TranscodeBuffer& buffer, size_t cursor)

      : XDRDecoderBase(cx, buffer, cursor) {

      : Base(cx, buffer, cursor) {

    MOZ_ASSERT(JS::IsTranscodingBytecodeAligned(buffer.begin()));

    MOZ_ASSERT(JS::IsTranscodingBytecodeOffsetAligned(cursor));

  }

  XDRStencilDecoder(JSContext* cx, const JS::TranscodeRange& range)

      : XDRDecoderBase(cx, range) {

      : Base(cx, range) {

    MOZ_ASSERT(JS::IsTranscodingBytecodeAligned(range.begin().get()));

  }

class XDRIncrementalStencilEncoder;

class XDRStencilEncoder : public XDREncoder {

class XDRStencilEncoder : public XDRState<XDR_ENCODE> {

  using Base = XDRState<XDR_ENCODE>;

 public:

  XDRStencilEncoder(JSContext* cx, JS::TranscodeBuffer& buffer)

      : XDREncoder(cx, buffer, buffer.length()) {

      : Base(cx, buffer, buffer.length()) {

    // NOTE: If buffer is empty, buffer.begin() doesn't point valid buffer.

    MOZ_ASSERT_IF(!buffer.empty(),

                  JS::IsTranscodingBytecodeAligned(buffer.begin()));