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[keel] Add cleaner way to write type converters

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This commit is contained in:
Gary Talent 2025-04-16 23:11:47 -05:00
parent c84b85102c
commit 849aceb86d
1 changed files with 67 additions and 0 deletions
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67
src/olympic/keel/include/keel/typeconv.hpp
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@ -174,6 +174,73 @@ class Converter: public BaseConverter {
}; };
template<auto Func>
class ConverterFunc: public BaseConverter {
private:
template<typename SrcType, typename DstType>
struct ParamExtractor {
using Src = SrcType;
using Dst = DstType;
};
template<typename S, typename D>
static auto makeParamExtractor(ox::Error (*)(keel::Context&, S&, D&)) {
return ParamExtractor<S, D>{};
}
public:
using SrcType = decltype(makeParamExtractor(Func))::Src;
using DstType = decltype(makeParamExtractor(Func))::Dst;
[[nodiscard]]
constexpr ox::StringView srcTypeName() const noexcept final {
return ox::ModelTypeName_v<SrcType>;
}
[[nodiscard]]
constexpr int srcTypeVersion() const noexcept final {
return ox::ModelTypeVersion_v<SrcType>;
}
[[nodiscard]]
constexpr bool srcMatches(ox::StringViewCR pSrcTypeName, int pSrcTypeVersion) const noexcept final {
constexpr auto SrcTypeName = ox::requireModelTypeName<SrcType>();
constexpr auto SrcTypeVersion = ox::requireModelTypeVersion<SrcType>();
return pSrcTypeName == SrcTypeName
&& pSrcTypeVersion == SrcTypeVersion;
}
[[nodiscard]]
constexpr bool dstMatches(ox::StringViewCR dstTypeName, int dstTypeVersion) const noexcept final {
constexpr auto DstTypeName = ox::StringView{ox::requireModelTypeName<DstType>()};
constexpr auto DstTypeVersion = ox::requireModelTypeVersion<DstType>();
return dstTypeName == DstTypeName
&& dstTypeVersion == DstTypeVersion;
}
ox::Result<ox::UPtr<Wrap>> convertPtrToPtr(
keel::Context &ctx, Wrap &src) const noexcept final {
ox::Result<ox::UPtr<Wrap>> dst{makeWrap<DstType>()};
OX_RETURN_ERROR(convert(ctx, wrapCast<SrcType>(src), wrapCast<DstType>(*dst.value)));
return dst;
}
ox::Result<ox::UPtr<Wrap>> convertBuffToPtr(
keel::Context &ctx, ox::BufferView const&srcBuff) const noexcept final {
OX_REQUIRE_M(src, readAsset<SrcType>(srcBuff));
ox::Result<ox::UPtr<Wrap>> dst{makeWrap<DstType>()};
OX_RETURN_ERROR(convert(ctx, src, wrapCast<DstType>(*dst.value)));
return dst;
}
protected:
ox::Error convert(keel::Context &ctx, SrcType &src, DstType &dst) const noexcept {
return Func(ctx, src, dst);
}
};
ox::Result<ox::UPtr<Wrap>> convert( ox::Result<ox::UPtr<Wrap>> convert(
keel::Context &ctx, keel::Context &ctx,
ox::BufferView const&srcBuffer, ox::BufferView const&srcBuffer,