TSdlOwnedField.h

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#pragma once
 
#include "SDL/Introspect/SdlField.h"
#include "SDL/sdl_fwd.h"
 
namespace ph
{
 
template<typename Owner>
class TSdlOwnedField : public SdlField
{
public:
    TSdlOwnedField(
        std::string typeName, 
        std::string valueName);
 
    TSdlOwnedField(
        std::string typeName, 
        std::string valueName,
        std::string typeSignature);
 
    virtual void ownedValueToDefault(Owner& owner) const = 0;
 
    virtual std::string valueToString(const Owner& owner) const = 0;
 
    virtual void ownedResources(
        const Owner& owner,
        std::vector<const ISdlResource*>& out_resources) const = 0;
 
    virtual SdlNativeData ownedNativeData(Owner& owner) const = 0;
 
    SdlNativeData nativeData(SdlNonConstInstance instance) const override;
 
    void fromSdl(
        Owner&                 owner, 
        const SdlInputClause&  clause,
        const SdlInputContext& ctx) const;
 
    void toSdl(
        const Owner&            owner,
        SdlOutputClause&        out_clause,
        const SdlOutputContext& ctx) const;
 
protected:
    virtual void loadFromSdl(
        Owner&                 owner, 
        const SdlInputClause&  clause,
        const SdlInputContext& ctx) const = 0;
 
    virtual void saveToSdl(
        const Owner&            owner,
        SdlOutputClause&        out_clause,
        const SdlOutputContext& ctx) const = 0;
 
private:
    // Nested field need the ability to wrap calls including non-public ones
    // Note that friend with partial specializations is not supported
    // in C++17. We resort to making more friend classes than needed.
    // 
    // The following friend statement is not yet supported:
    //
    // template<typename InnerType>
    // friend class TSdlNestedField<Owner, InnerType>;
    //
    // See https://stackoverflow.com/questions/44213761/partial-template-specialization-for-friend-classes
    //
    template<typename OuterType, typename InnerType>
    friend class TSdlNestedField;
};
 
}// end namespace ph
 
#include "SDL/Introspect/TSdlOwnedField.ipp"