Chris@47: // Copyright (c) 2013-2014 Sandstorm Development Group, Inc. and contributors
Chris@47: // Licensed under the MIT License:
Chris@47: //
Chris@47: // Permission is hereby granted, free of charge, to any person obtaining a copy
Chris@47: // of this software and associated documentation files (the "Software"), to deal
Chris@47: // in the Software without restriction, including without limitation the rights
Chris@47: // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Chris@47: // copies of the Software, and to permit persons to whom the Software is
Chris@47: // furnished to do so, subject to the following conditions:
Chris@47: //
Chris@47: // The above copyright notice and this permission notice shall be included in
Chris@47: // all copies or substantial portions of the Software.
Chris@47: //
Chris@47: // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Chris@47: // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Chris@47: // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Chris@47: // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Chris@47: // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Chris@47: // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Chris@47: // THE SOFTWARE.
Chris@47: 
Chris@47: #ifndef CAPNP_ANY_H_
Chris@47: #define CAPNP_ANY_H_
Chris@47: 
Chris@47: #if defined(__GNUC__) && !defined(CAPNP_HEADER_WARNINGS)
Chris@47: #pragma GCC system_header
Chris@47: #endif
Chris@47: 
Chris@47: #include "layout.h"
Chris@47: #include "pointer-helpers.h"
Chris@47: #include "orphan.h"
Chris@47: #include "list.h"
Chris@47: 
Chris@47: namespace capnp {
Chris@47: 
Chris@47: class StructSchema;
Chris@47: class ListSchema;
Chris@47: class InterfaceSchema;
Chris@47: class Orphanage;
Chris@47: class ClientHook;
Chris@47: class PipelineHook;
Chris@47: struct PipelineOp;
Chris@47: struct AnyPointer;
Chris@47: 
Chris@47: struct AnyList {
Chris@47:   AnyList() = delete;
Chris@47: 
Chris@47:   class Reader;
Chris@47:   class Builder;
Chris@47: };
Chris@47: 
Chris@47: struct AnyStruct {
Chris@47:   AnyStruct() = delete;
Chris@47: 
Chris@47:   class Reader;
Chris@47:   class Builder;
Chris@47:   class Pipeline;
Chris@47: };
Chris@47: 
Chris@47: template<>
Chris@47: struct List<AnyStruct, Kind::OTHER> {
Chris@47:   List() = delete;
Chris@47: 
Chris@47:   class Reader;
Chris@47:   class Builder;
Chris@47: };
Chris@47: 
Chris@47: namespace _ {  // private
Chris@47: template <> struct Kind_<AnyPointer> { static constexpr Kind kind = Kind::OTHER; };
Chris@47: template <> struct Kind_<AnyStruct> { static constexpr Kind kind = Kind::OTHER; };
Chris@47: template <> struct Kind_<AnyList> { static constexpr Kind kind = Kind::OTHER; };
Chris@47: }  // namespace _ (private)
Chris@47: 
Chris@47: // =======================================================================================
Chris@47: // AnyPointer!
Chris@47: 
Chris@47: enum class Equality {
Chris@47:   NOT_EQUAL,
Chris@47:   EQUAL,
Chris@47:   UNKNOWN_CONTAINS_CAPS
Chris@47: };
Chris@47: 
Chris@47: kj::StringPtr KJ_STRINGIFY(Equality res);
Chris@47: 
Chris@47: struct AnyPointer {
Chris@47:   // Reader/Builder for the `AnyPointer` field type, i.e. a pointer that can point to an arbitrary
Chris@47:   // object.
Chris@47: 
Chris@47:   AnyPointer() = delete;
Chris@47: 
Chris@47:   class Reader {
Chris@47:   public:
Chris@47:     typedef AnyPointer Reads;
Chris@47: 
Chris@47:     Reader() = default;
Chris@47:     inline Reader(_::PointerReader reader): reader(reader) {}
Chris@47: 
Chris@47:     inline MessageSize targetSize() const;
Chris@47:     // Get the total size of the target object and all its children.
Chris@47: 
Chris@47:     inline PointerType getPointerType() const;
Chris@47: 
Chris@47:     inline bool isNull() const { return getPointerType() == PointerType::NULL_; }
Chris@47:     inline bool isStruct() const { return getPointerType() == PointerType::STRUCT; }
Chris@47:     inline bool isList() const { return getPointerType() == PointerType::LIST; }
Chris@47:     inline bool isCapability() const { return getPointerType() == PointerType::CAPABILITY; }
Chris@47: 
Chris@47:     Equality equals(AnyPointer::Reader right);
Chris@47:     bool operator==(AnyPointer::Reader right);
Chris@47:     inline bool operator!=(AnyPointer::Reader right) {
Chris@47:       return !(*this == right);
Chris@47:     }
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline ReaderFor<T> getAs() const;
Chris@47:     // Valid for T = any generated struct type, interface type, List<U>, Text, or Data.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline ReaderFor<T> getAs(StructSchema schema) const;
Chris@47:     // Only valid for T = DynamicStruct.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline ReaderFor<T> getAs(ListSchema schema) const;
Chris@47:     // Only valid for T = DynamicList.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline ReaderFor<T> getAs(InterfaceSchema schema) const;
Chris@47:     // Only valid for T = DynamicCapability.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47: #if !CAPNP_LITE
Chris@47:     kj::Own<ClientHook> getPipelinedCap(kj::ArrayPtr<const PipelineOp> ops) const;
Chris@47:     // Used by RPC system to implement pipelining.  Applications generally shouldn't use this
Chris@47:     // directly.
Chris@47: #endif  // !CAPNP_LITE
Chris@47: 
Chris@47:   private:
Chris@47:     _::PointerReader reader;
Chris@47:     friend struct AnyPointer;
Chris@47:     friend class Orphanage;
Chris@47:     friend class CapReaderContext;
Chris@47:     friend struct _::PointerHelpers<AnyPointer>;
Chris@47:   };
Chris@47: 
Chris@47:   class Builder {
Chris@47:   public:
Chris@47:     typedef AnyPointer Builds;
Chris@47: 
Chris@47:     Builder() = delete;
Chris@47:     inline Builder(decltype(nullptr)) {}
Chris@47:     inline Builder(_::PointerBuilder builder): builder(builder) {}
Chris@47: 
Chris@47:     inline MessageSize targetSize() const;
Chris@47:     // Get the total size of the target object and all its children.
Chris@47: 
Chris@47:     inline PointerType getPointerType();
Chris@47: 
Chris@47:     inline bool isNull() { return getPointerType() == PointerType::NULL_; }
Chris@47:     inline bool isStruct() { return getPointerType() == PointerType::STRUCT; }
Chris@47:     inline bool isList() { return getPointerType() == PointerType::LIST; }
Chris@47:     inline bool isCapability() { return getPointerType() == PointerType::CAPABILITY; }
Chris@47: 
Chris@47:     inline Equality equals(AnyPointer::Reader right) {
Chris@47:       return asReader().equals(right);
Chris@47:     }
Chris@47:     inline bool operator==(AnyPointer::Reader right) {
Chris@47:       return asReader() == right;
Chris@47:     }
Chris@47:     inline bool operator!=(AnyPointer::Reader right) {
Chris@47:       return !(*this == right);
Chris@47:     }
Chris@47: 
Chris@47:     inline void clear();
Chris@47:     // Set to null.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline BuilderFor<T> getAs();
Chris@47:     // Valid for T = any generated struct type, List<U>, Text, or Data.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline BuilderFor<T> getAs(StructSchema schema);
Chris@47:     // Only valid for T = DynamicStruct.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline BuilderFor<T> getAs(ListSchema schema);
Chris@47:     // Only valid for T = DynamicList.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline BuilderFor<T> getAs(InterfaceSchema schema);
Chris@47:     // Only valid for T = DynamicCapability.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline BuilderFor<T> initAs();
Chris@47:     // Valid for T = any generated struct type.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline BuilderFor<T> initAs(uint elementCount);
Chris@47:     // Valid for T = List<U>, Text, or Data.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline BuilderFor<T> initAs(StructSchema schema);
Chris@47:     // Only valid for T = DynamicStruct.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline BuilderFor<T> initAs(ListSchema schema, uint elementCount);
Chris@47:     // Only valid for T = DynamicList.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     inline AnyList::Builder initAsAnyList(ElementSize elementSize, uint elementCount);
Chris@47:     // Note: Does not accept INLINE_COMPOSITE for elementSize.
Chris@47: 
Chris@47:     inline List<AnyStruct>::Builder initAsListOfAnyStruct(
Chris@47:         uint dataWordCount, uint pointerCount, uint elementCount);
Chris@47: 
Chris@47:     inline AnyStruct::Builder initAsAnyStruct(uint dataWordCount, uint pointerCount);
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline void setAs(ReaderFor<T> value);
Chris@47:     // Valid for ReaderType = T::Reader for T = any generated struct type, List<U>, Text, Data,
Chris@47:     // DynamicStruct, or DynamicList (the dynamic types require `#include <capnp/dynamic.h>`).
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline void setAs(std::initializer_list<ReaderFor<ListElementType<T>>> list);
Chris@47:     // Valid for T = List<?>.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline void setCanonicalAs(ReaderFor<T> value);
Chris@47: 
Chris@47:     inline void set(Reader value) { builder.copyFrom(value.reader); }
Chris@47:     // Set to a copy of another AnyPointer.
Chris@47: 
Chris@47:     inline void setCanonical(Reader value) { builder.copyFrom(value.reader, true); }
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline void adopt(Orphan<T>&& orphan);
Chris@47:     // Valid for T = any generated struct type, List<U>, Text, Data, DynamicList, DynamicStruct,
Chris@47:     // or DynamicValue (the dynamic types require `#include <capnp/dynamic.h>`).
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline Orphan<T> disownAs();
Chris@47:     // Valid for T = any generated struct type, List<U>, Text, Data.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline Orphan<T> disownAs(StructSchema schema);
Chris@47:     // Only valid for T = DynamicStruct.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline Orphan<T> disownAs(ListSchema schema);
Chris@47:     // Only valid for T = DynamicList.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     template <typename T>
Chris@47:     inline Orphan<T> disownAs(InterfaceSchema schema);
Chris@47:     // Only valid for T = DynamicCapability.  Requires `#include <capnp/dynamic.h>`.
Chris@47: 
Chris@47:     inline Orphan<AnyPointer> disown();
Chris@47:     // Disown without a type.
Chris@47: 
Chris@47:     inline Reader asReader() const { return Reader(builder.asReader()); }
Chris@47:     inline operator Reader() const { return Reader(builder.asReader()); }
Chris@47: 
Chris@47:   private:
Chris@47:     _::PointerBuilder builder;
Chris@47:     friend class Orphanage;
Chris@47:     friend class CapBuilderContext;
Chris@47:     friend struct _::PointerHelpers<AnyPointer>;
Chris@47:   };
Chris@47: 
Chris@47: #if !CAPNP_LITE
Chris@47:   class Pipeline {
Chris@47:   public:
Chris@47:     typedef AnyPointer Pipelines;
Chris@47: 
Chris@47:     inline Pipeline(decltype(nullptr)) {}
Chris@47:     inline explicit Pipeline(kj::Own<PipelineHook>&& hook): hook(kj::mv(hook)) {}
Chris@47: 
Chris@47:     Pipeline noop();
Chris@47:     // Just make a copy.
Chris@47: 
Chris@47:     Pipeline getPointerField(uint16_t pointerIndex);
Chris@47:     // Deprecated. In the future, we should use .asAnyStruct.getPointerField.
Chris@47: 
Chris@47:     inline AnyStruct::Pipeline asAnyStruct();
Chris@47: 
Chris@47:     kj::Own<ClientHook> asCap();
Chris@47:     // Expect that the result is a capability and construct a pipelined version of it now.
Chris@47: 
Chris@47:     inline kj::Own<PipelineHook> releasePipelineHook() { return kj::mv(hook); }
Chris@47:     // For use by RPC implementations.
Chris@47: 
Chris@47:     template <typename T, typename = kj::EnableIf<CAPNP_KIND(FromClient<T>) == Kind::INTERFACE>>
Chris@47:     inline operator T() { return T(asCap()); }
Chris@47: 
Chris@47:   private:
Chris@47:     kj::Own<PipelineHook> hook;
Chris@47:     kj::Array<PipelineOp> ops;
Chris@47: 
Chris@47:     inline Pipeline(kj::Own<PipelineHook>&& hook, kj::Array<PipelineOp>&& ops)
Chris@47:         : hook(kj::mv(hook)), ops(kj::mv(ops)) {}
Chris@47: 
Chris@47:     friend class LocalClient;
Chris@47:     friend class PipelineHook;
Chris@47:     friend class AnyStruct::Pipeline;
Chris@47:   };
Chris@47: #endif  // !CAPNP_LITE
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: class Orphan<AnyPointer> {
Chris@47:   // An orphaned object of unknown type.
Chris@47: 
Chris@47: public:
Chris@47:   Orphan() = default;
Chris@47:   KJ_DISALLOW_COPY(Orphan);
Chris@47:   Orphan(Orphan&&) = default;
Chris@47:   inline Orphan(_::OrphanBuilder&& builder)
Chris@47:       : builder(kj::mv(builder)) {}
Chris@47: 
Chris@47:   Orphan& operator=(Orphan&&) = default;
Chris@47: 
Chris@47:   template <typename T>
Chris@47:   inline Orphan(Orphan<T>&& other): builder(kj::mv(other.builder)) {}
Chris@47:   template <typename T>
Chris@47:   inline Orphan& operator=(Orphan<T>&& other) { builder = kj::mv(other.builder); return *this; }
Chris@47:   // Cast from typed orphan.
Chris@47: 
Chris@47:   // It's not possible to get an AnyPointer::{Reader,Builder} directly since there is no
Chris@47:   // underlying pointer (the pointer would normally live in the parent, but this object is
Chris@47:   // orphaned).  It is possible, however, to request typed readers/builders.
Chris@47: 
Chris@47:   template <typename T>
Chris@47:   inline BuilderFor<T> getAs();
Chris@47:   template <typename T>
Chris@47:   inline BuilderFor<T> getAs(StructSchema schema);
Chris@47:   template <typename T>
Chris@47:   inline BuilderFor<T> getAs(ListSchema schema);
Chris@47:   template <typename T>
Chris@47:   inline typename T::Client getAs(InterfaceSchema schema);
Chris@47:   template <typename T>
Chris@47:   inline ReaderFor<T> getAsReader() const;
Chris@47:   template <typename T>
Chris@47:   inline ReaderFor<T> getAsReader(StructSchema schema) const;
Chris@47:   template <typename T>
Chris@47:   inline ReaderFor<T> getAsReader(ListSchema schema) const;
Chris@47:   template <typename T>
Chris@47:   inline typename T::Client getAsReader(InterfaceSchema schema) const;
Chris@47: 
Chris@47:   template <typename T>
Chris@47:   inline Orphan<T> releaseAs();
Chris@47:   template <typename T>
Chris@47:   inline Orphan<T> releaseAs(StructSchema schema);
Chris@47:   template <typename T>
Chris@47:   inline Orphan<T> releaseAs(ListSchema schema);
Chris@47:   template <typename T>
Chris@47:   inline Orphan<T> releaseAs(InterfaceSchema schema);
Chris@47:   // Down-cast the orphan to a specific type.
Chris@47: 
Chris@47:   inline bool operator==(decltype(nullptr)) const { return builder == nullptr; }
Chris@47:   inline bool operator!=(decltype(nullptr)) const { return builder != nullptr; }
Chris@47: 
Chris@47: private:
Chris@47:   _::OrphanBuilder builder;
Chris@47: 
Chris@47:   template <typename, Kind>
Chris@47:   friend struct _::PointerHelpers;
Chris@47:   friend class Orphanage;
Chris@47:   template <typename U>
Chris@47:   friend class Orphan;
Chris@47:   friend class AnyPointer::Builder;
Chris@47: };
Chris@47: 
Chris@47: template <Kind k> struct AnyTypeFor_;
Chris@47: template <> struct AnyTypeFor_<Kind::STRUCT> { typedef AnyStruct Type; };
Chris@47: template <> struct AnyTypeFor_<Kind::LIST> { typedef AnyList Type; };
Chris@47: 
Chris@47: template <typename T>
Chris@47: using AnyTypeFor = typename AnyTypeFor_<CAPNP_KIND(T)>::Type;
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline ReaderFor<AnyTypeFor<FromReader<T>>> toAny(T&& value) {
Chris@47:   return ReaderFor<AnyTypeFor<FromReader<T>>>(
Chris@47:       _::PointerHelpers<FromReader<T>>::getInternalReader(value));
Chris@47: }
Chris@47: template <typename T>
Chris@47: inline BuilderFor<AnyTypeFor<FromBuilder<T>>> toAny(T&& value) {
Chris@47:   return BuilderFor<AnyTypeFor<FromBuilder<T>>>(
Chris@47:       _::PointerHelpers<FromBuilder<T>>::getInternalBuilder(kj::mv(value)));
Chris@47: }
Chris@47: 
Chris@47: template <>
Chris@47: struct List<AnyPointer, Kind::OTHER> {
Chris@47:   // Note: This cannot be used for a list of structs, since such lists are not encoded as pointer
Chris@47:   //   lists! Use List<AnyStruct>.
Chris@47: 
Chris@47:   List() = delete;
Chris@47: 
Chris@47:   class Reader {
Chris@47:   public:
Chris@47:     typedef List<AnyPointer> Reads;
Chris@47: 
Chris@47:     inline Reader(): reader(ElementSize::POINTER) {}
Chris@47:     inline explicit Reader(_::ListReader reader): reader(reader) {}
Chris@47: 
Chris@47:     inline uint size() const { return reader.size() / ELEMENTS; }
Chris@47:     inline AnyPointer::Reader operator[](uint index) const {
Chris@47:       KJ_IREQUIRE(index < size());
Chris@47:       return AnyPointer::Reader(reader.getPointerElement(index * ELEMENTS));
Chris@47:     }
Chris@47: 
Chris@47:     typedef _::IndexingIterator<const Reader, typename AnyPointer::Reader> Iterator;
Chris@47:     inline Iterator begin() const { return Iterator(this, 0); }
Chris@47:     inline Iterator end() const { return Iterator(this, size()); }
Chris@47: 
Chris@47:   private:
Chris@47:     _::ListReader reader;
Chris@47:     template <typename U, Kind K>
Chris@47:     friend struct _::PointerHelpers;
Chris@47:     template <typename U, Kind K>
Chris@47:     friend struct List;
Chris@47:     friend class Orphanage;
Chris@47:     template <typename U, Kind K>
Chris@47:     friend struct ToDynamic_;
Chris@47:   };
Chris@47: 
Chris@47:   class Builder {
Chris@47:   public:
Chris@47:     typedef List<AnyPointer> Builds;
Chris@47: 
Chris@47:     Builder() = delete;
Chris@47:     inline Builder(decltype(nullptr)): builder(ElementSize::POINTER) {}
Chris@47:     inline explicit Builder(_::ListBuilder builder): builder(builder) {}
Chris@47: 
Chris@47:     inline operator Reader() const { return Reader(builder.asReader()); }
Chris@47:     inline Reader asReader() const { return Reader(builder.asReader()); }
Chris@47: 
Chris@47:     inline uint size() const { return builder.size() / ELEMENTS; }
Chris@47:     inline AnyPointer::Builder operator[](uint index) {
Chris@47:       KJ_IREQUIRE(index < size());
Chris@47:       return AnyPointer::Builder(builder.getPointerElement(index * ELEMENTS));
Chris@47:     }
Chris@47: 
Chris@47:     typedef _::IndexingIterator<Builder, typename AnyPointer::Builder> Iterator;
Chris@47:     inline Iterator begin() { return Iterator(this, 0); }
Chris@47:     inline Iterator end() { return Iterator(this, size()); }
Chris@47: 
Chris@47:   private:
Chris@47:     _::ListBuilder builder;
Chris@47:     template <typename, Kind>
Chris@47:     friend struct _::PointerHelpers;
Chris@47:     friend class Orphanage;
Chris@47:     template <typename, Kind>
Chris@47:     friend struct ToDynamic_;
Chris@47:   };
Chris@47: };
Chris@47: 
Chris@47: class AnyStruct::Reader {
Chris@47: public:
Chris@47:   typedef AnyStruct Reads;
Chris@47: 
Chris@47:   Reader() = default;
Chris@47:   inline Reader(_::StructReader reader): _reader(reader) {}
Chris@47: 
Chris@47:   template <typename T, typename = kj::EnableIf<CAPNP_KIND(FromReader<T>) == Kind::STRUCT>>
Chris@47:   inline Reader(T&& value)
Chris@47:       : _reader(_::PointerHelpers<FromReader<T>>::getInternalReader(kj::fwd<T>(value))) {}
Chris@47: 
Chris@47:   kj::ArrayPtr<const byte> getDataSection() {
Chris@47:     return _reader.getDataSectionAsBlob();
Chris@47:   }
Chris@47:   List<AnyPointer>::Reader getPointerSection() {
Chris@47:     return List<AnyPointer>::Reader(_reader.getPointerSectionAsList());
Chris@47:   }
Chris@47: 
Chris@47:   kj::Array<word> canonicalize() {
Chris@47:     return _reader.canonicalize();
Chris@47:   }
Chris@47: 
Chris@47:   Equality equals(AnyStruct::Reader right);
Chris@47:   bool operator==(AnyStruct::Reader right);
Chris@47:   inline bool operator!=(AnyStruct::Reader right) {
Chris@47:     return !(*this == right);
Chris@47:   }
Chris@47: 
Chris@47:   template <typename T>
Chris@47:   ReaderFor<T> as() const {
Chris@47:     // T must be a struct type.
Chris@47:     return typename T::Reader(_reader);
Chris@47:   }
Chris@47: private:
Chris@47:   _::StructReader _reader;
Chris@47: 
Chris@47:   template <typename, Kind>
Chris@47:   friend struct _::PointerHelpers;
Chris@47:   friend class Orphanage;
Chris@47: };
Chris@47: 
Chris@47: class AnyStruct::Builder {
Chris@47: public:
Chris@47:   typedef AnyStruct Builds;
Chris@47: 
Chris@47:   inline Builder(decltype(nullptr)) {}
Chris@47:   inline Builder(_::StructBuilder builder): _builder(builder) {}
Chris@47: 
Chris@47: #if !_MSC_VER  // TODO(msvc): MSVC ICEs on this. Try restoring when compiler improves.
Chris@47:   template <typename T, typename = kj::EnableIf<CAPNP_KIND(FromBuilder<T>) == Kind::STRUCT>>
Chris@47:   inline Builder(T&& value)
Chris@47:       : _builder(_::PointerHelpers<FromBuilder<T>>::getInternalBuilder(kj::fwd<T>(value))) {}
Chris@47: #endif
Chris@47: 
Chris@47:   inline kj::ArrayPtr<byte> getDataSection() {
Chris@47:     return _builder.getDataSectionAsBlob();
Chris@47:   }
Chris@47:   List<AnyPointer>::Builder getPointerSection() {
Chris@47:     return List<AnyPointer>::Builder(_builder.getPointerSectionAsList());
Chris@47:   }
Chris@47: 
Chris@47:   inline Equality equals(AnyStruct::Reader right) {
Chris@47:     return asReader().equals(right);
Chris@47:   }
Chris@47:   inline bool operator==(AnyStruct::Reader right) {
Chris@47:     return asReader() == right;
Chris@47:   }
Chris@47:   inline bool operator!=(AnyStruct::Reader right) {
Chris@47:     return !(*this == right);
Chris@47:   }
Chris@47: 
Chris@47:   inline operator Reader() const { return Reader(_builder.asReader()); }
Chris@47:   inline Reader asReader() const { return Reader(_builder.asReader()); }
Chris@47: 
Chris@47:   template <typename T>
Chris@47:   BuilderFor<T> as() {
Chris@47:     // T must be a struct type.
Chris@47:     return typename T::Builder(_builder);
Chris@47:   }
Chris@47: private:
Chris@47:   _::StructBuilder _builder;
Chris@47:   friend class Orphanage;
Chris@47:   friend class CapBuilderContext;
Chris@47: };
Chris@47: 
Chris@47: #if !CAPNP_LITE
Chris@47: class AnyStruct::Pipeline {
Chris@47: public:
Chris@47:   inline Pipeline(decltype(nullptr)): typeless(nullptr) {}
Chris@47:   inline explicit Pipeline(AnyPointer::Pipeline&& typeless)
Chris@47:       : typeless(kj::mv(typeless)) {}
Chris@47: 
Chris@47:   inline AnyPointer::Pipeline getPointerField(uint16_t pointerIndex) {
Chris@47:     // Return a new Promise representing a sub-object of the result.  `pointerIndex` is the index
Chris@47:     // of the sub-object within the pointer section of the result (the result must be a struct).
Chris@47:     //
Chris@47:     // TODO(perf):  On GCC 4.8 / Clang 3.3, use rvalue qualifiers to avoid the need for copies.
Chris@47:     //   Also make `ops` into a Vector to optimize this.
Chris@47:     return typeless.getPointerField(pointerIndex);
Chris@47:   }
Chris@47: 
Chris@47: private:
Chris@47:   AnyPointer::Pipeline typeless;
Chris@47: };
Chris@47: #endif  // !CAPNP_LITE
Chris@47: 
Chris@47: class List<AnyStruct, Kind::OTHER>::Reader {
Chris@47: public:
Chris@47:   typedef List<AnyStruct> Reads;
Chris@47: 
Chris@47:   inline Reader(): reader(ElementSize::INLINE_COMPOSITE) {}
Chris@47:   inline explicit Reader(_::ListReader reader): reader(reader) {}
Chris@47: 
Chris@47:   inline uint size() const { return reader.size() / ELEMENTS; }
Chris@47:   inline AnyStruct::Reader operator[](uint index) const {
Chris@47:     KJ_IREQUIRE(index < size());
Chris@47:     return AnyStruct::Reader(reader.getStructElement(index * ELEMENTS));
Chris@47:   }
Chris@47: 
Chris@47:   typedef _::IndexingIterator<const Reader, typename AnyStruct::Reader> Iterator;
Chris@47:   inline Iterator begin() const { return Iterator(this, 0); }
Chris@47:   inline Iterator end() const { return Iterator(this, size()); }
Chris@47: 
Chris@47: private:
Chris@47:   _::ListReader reader;
Chris@47:   template <typename U, Kind K>
Chris@47:   friend struct _::PointerHelpers;
Chris@47:   template <typename U, Kind K>
Chris@47:   friend struct List;
Chris@47:   friend class Orphanage;
Chris@47:   template <typename U, Kind K>
Chris@47:   friend struct ToDynamic_;
Chris@47: };
Chris@47: 
Chris@47: class List<AnyStruct, Kind::OTHER>::Builder {
Chris@47: public:
Chris@47:   typedef List<AnyStruct> Builds;
Chris@47: 
Chris@47:   Builder() = delete;
Chris@47:   inline Builder(decltype(nullptr)): builder(ElementSize::INLINE_COMPOSITE) {}
Chris@47:   inline explicit Builder(_::ListBuilder builder): builder(builder) {}
Chris@47: 
Chris@47:   inline operator Reader() const { return Reader(builder.asReader()); }
Chris@47:   inline Reader asReader() const { return Reader(builder.asReader()); }
Chris@47: 
Chris@47:   inline uint size() const { return builder.size() / ELEMENTS; }
Chris@47:   inline AnyStruct::Builder operator[](uint index) {
Chris@47:     KJ_IREQUIRE(index < size());
Chris@47:     return AnyStruct::Builder(builder.getStructElement(index * ELEMENTS));
Chris@47:   }
Chris@47: 
Chris@47:   typedef _::IndexingIterator<Builder, typename AnyStruct::Builder> Iterator;
Chris@47:   inline Iterator begin() { return Iterator(this, 0); }
Chris@47:   inline Iterator end() { return Iterator(this, size()); }
Chris@47: 
Chris@47: private:
Chris@47:   _::ListBuilder builder;
Chris@47:   template <typename U, Kind K>
Chris@47:   friend struct _::PointerHelpers;
Chris@47:   friend class Orphanage;
Chris@47:   template <typename U, Kind K>
Chris@47:   friend struct ToDynamic_;
Chris@47: };
Chris@47: 
Chris@47: class AnyList::Reader {
Chris@47: public:
Chris@47:   typedef AnyList Reads;
Chris@47: 
Chris@47:   inline Reader(): _reader(ElementSize::VOID) {}
Chris@47:   inline Reader(_::ListReader reader): _reader(reader) {}
Chris@47: 
Chris@47: #if !_MSC_VER  // TODO(msvc): MSVC ICEs on this. Try restoring when compiler improves.
Chris@47:   template <typename T, typename = kj::EnableIf<CAPNP_KIND(FromReader<T>) == Kind::LIST>>
Chris@47:   inline Reader(T&& value)
Chris@47:       : _reader(_::PointerHelpers<FromReader<T>>::getInternalReader(kj::fwd<T>(value))) {}
Chris@47: #endif
Chris@47: 
Chris@47:   inline ElementSize getElementSize() { return _reader.getElementSize(); }
Chris@47:   inline uint size() { return _reader.size() / ELEMENTS; }
Chris@47: 
Chris@47:   inline kj::ArrayPtr<const byte> getRawBytes() { return _reader.asRawBytes(); }
Chris@47: 
Chris@47:   Equality equals(AnyList::Reader right);
Chris@47:   bool operator==(AnyList::Reader right);
Chris@47:   inline bool operator!=(AnyList::Reader right) {
Chris@47:     return !(*this == right);
Chris@47:   }
Chris@47: 
Chris@47:   template <typename T> ReaderFor<T> as() {
Chris@47:     // T must be List<U>.
Chris@47:     return ReaderFor<T>(_reader);
Chris@47:   }
Chris@47: private:
Chris@47:   _::ListReader _reader;
Chris@47: 
Chris@47:   template <typename, Kind>
Chris@47:   friend struct _::PointerHelpers;
Chris@47:   friend class Orphanage;
Chris@47: };
Chris@47: 
Chris@47: class AnyList::Builder {
Chris@47: public:
Chris@47:   typedef AnyList Builds;
Chris@47: 
Chris@47:   inline Builder(decltype(nullptr)): _builder(ElementSize::VOID) {}
Chris@47:   inline Builder(_::ListBuilder builder): _builder(builder) {}
Chris@47: 
Chris@47: #if !_MSC_VER  // TODO(msvc): MSVC ICEs on this. Try restoring when compiler improves.
Chris@47:   template <typename T, typename = kj::EnableIf<CAPNP_KIND(FromBuilder<T>) == Kind::LIST>>
Chris@47:   inline Builder(T&& value)
Chris@47:       : _builder(_::PointerHelpers<FromBuilder<T>>::getInternalBuilder(kj::fwd<T>(value))) {}
Chris@47: #endif
Chris@47: 
Chris@47:   inline ElementSize getElementSize() { return _builder.getElementSize(); }
Chris@47:   inline uint size() { return _builder.size() / ELEMENTS; }
Chris@47: 
Chris@47:   Equality equals(AnyList::Reader right);
Chris@47:   inline bool operator==(AnyList::Reader right) {
Chris@47:     return asReader() == right;
Chris@47:   }
Chris@47:   inline bool operator!=(AnyList::Reader right) {
Chris@47:     return !(*this == right);
Chris@47:   }
Chris@47: 
Chris@47:   template <typename T> BuilderFor<T> as() {
Chris@47:     // T must be List<U>.
Chris@47:     return BuilderFor<T>(_builder);
Chris@47:   }
Chris@47: 
Chris@47:   inline operator Reader() const { return Reader(_builder.asReader()); }
Chris@47:   inline Reader asReader() const { return Reader(_builder.asReader()); }
Chris@47: 
Chris@47: private:
Chris@47:   _::ListBuilder _builder;
Chris@47: 
Chris@47:   friend class Orphanage;
Chris@47: };
Chris@47: 
Chris@47: // =======================================================================================
Chris@47: // Pipeline helpers
Chris@47: //
Chris@47: // These relate to capabilities, but we don't declare them in capability.h because generated code
Chris@47: // for structs needs to know about these, even in files that contain no interfaces.
Chris@47: 
Chris@47: #if !CAPNP_LITE
Chris@47: 
Chris@47: struct PipelineOp {
Chris@47:   // Corresponds to rpc.capnp's PromisedAnswer.Op.
Chris@47: 
Chris@47:   enum Type {
Chris@47:     NOOP,  // for convenience
Chris@47: 
Chris@47:     GET_POINTER_FIELD
Chris@47: 
Chris@47:     // There may be other types in the future...
Chris@47:   };
Chris@47: 
Chris@47:   Type type;
Chris@47:   union {
Chris@47:     uint16_t pointerIndex;  // for GET_POINTER_FIELD
Chris@47:   };
Chris@47: };
Chris@47: 
Chris@47: class PipelineHook {
Chris@47:   // Represents a currently-running call, and implements pipelined requests on its result.
Chris@47: 
Chris@47: public:
Chris@47:   virtual kj::Own<PipelineHook> addRef() = 0;
Chris@47:   // Increment this object's reference count.
Chris@47: 
Chris@47:   virtual kj::Own<ClientHook> getPipelinedCap(kj::ArrayPtr<const PipelineOp> ops) = 0;
Chris@47:   // Extract a promised Capability from the results.
Chris@47: 
Chris@47:   virtual kj::Own<ClientHook> getPipelinedCap(kj::Array<PipelineOp>&& ops);
Chris@47:   // Version of getPipelinedCap() passing the array by move.  May avoid a copy in some cases.
Chris@47:   // Default implementation just calls the other version.
Chris@47: 
Chris@47:   template <typename Pipeline, typename = FromPipeline<Pipeline>>
Chris@47:   static inline kj::Own<PipelineHook> from(Pipeline&& pipeline);
Chris@47: 
Chris@47: private:
Chris@47:   template <typename T> struct FromImpl;
Chris@47: };
Chris@47: 
Chris@47: #endif  // !CAPNP_LITE
Chris@47: 
Chris@47: // =======================================================================================
Chris@47: // Inline implementation details
Chris@47: 
Chris@47: inline MessageSize AnyPointer::Reader::targetSize() const {
Chris@47:   return reader.targetSize().asPublic();
Chris@47: }
Chris@47: 
Chris@47: inline PointerType AnyPointer::Reader::getPointerType() const {
Chris@47:   return reader.getPointerType();
Chris@47: }
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline ReaderFor<T> AnyPointer::Reader::getAs() const {
Chris@47:   return _::PointerHelpers<T>::get(reader);
Chris@47: }
Chris@47: 
Chris@47: inline MessageSize AnyPointer::Builder::targetSize() const {
Chris@47:   return asReader().targetSize();
Chris@47: }
Chris@47: 
Chris@47: inline PointerType AnyPointer::Builder::getPointerType() {
Chris@47:   return builder.getPointerType();
Chris@47: }
Chris@47: 
Chris@47: inline void AnyPointer::Builder::clear() {
Chris@47:   return builder.clear();
Chris@47: }
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline BuilderFor<T> AnyPointer::Builder::getAs() {
Chris@47:   return _::PointerHelpers<T>::get(builder);
Chris@47: }
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline BuilderFor<T> AnyPointer::Builder::initAs() {
Chris@47:   return _::PointerHelpers<T>::init(builder);
Chris@47: }
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline BuilderFor<T> AnyPointer::Builder::initAs(uint elementCount) {
Chris@47:   return _::PointerHelpers<T>::init(builder, elementCount);
Chris@47: }
Chris@47: 
Chris@47: inline AnyList::Builder AnyPointer::Builder::initAsAnyList(
Chris@47:     ElementSize elementSize, uint elementCount) {
Chris@47:   return AnyList::Builder(builder.initList(elementSize, elementCount * ELEMENTS));
Chris@47: }
Chris@47: 
Chris@47: inline List<AnyStruct>::Builder AnyPointer::Builder::initAsListOfAnyStruct(
Chris@47:     uint dataWordCount, uint pointerCount, uint elementCount) {
Chris@47:   return List<AnyStruct>::Builder(builder.initStructList(elementCount * ELEMENTS,
Chris@47:       _::StructSize(dataWordCount * WORDS, pointerCount * POINTERS)));
Chris@47: }
Chris@47: 
Chris@47: inline AnyStruct::Builder AnyPointer::Builder::initAsAnyStruct(uint dataWordCount, uint pointerCount) {
Chris@47:   return AnyStruct::Builder(builder.initStruct(
Chris@47:       _::StructSize(dataWordCount * WORDS, pointerCount * POINTERS)));
Chris@47: }
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline void AnyPointer::Builder::setAs(ReaderFor<T> value) {
Chris@47:   return _::PointerHelpers<T>::set(builder, value);
Chris@47: }
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline void AnyPointer::Builder::setCanonicalAs(ReaderFor<T> value) {
Chris@47:   return _::PointerHelpers<T>::setCanonical(builder, value);
Chris@47: }
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline void AnyPointer::Builder::setAs(
Chris@47:     std::initializer_list<ReaderFor<ListElementType<T>>> list) {
Chris@47:   return _::PointerHelpers<T>::set(builder, list);
Chris@47: }
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline void AnyPointer::Builder::adopt(Orphan<T>&& orphan) {
Chris@47:   _::PointerHelpers<T>::adopt(builder, kj::mv(orphan));
Chris@47: }
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline Orphan<T> AnyPointer::Builder::disownAs() {
Chris@47:   return _::PointerHelpers<T>::disown(builder);
Chris@47: }
Chris@47: 
Chris@47: inline Orphan<AnyPointer> AnyPointer::Builder::disown() {
Chris@47:   return Orphan<AnyPointer>(builder.disown());
Chris@47: }
Chris@47: 
Chris@47: template <> struct ReaderFor_ <AnyPointer, Kind::OTHER> { typedef AnyPointer::Reader Type; };
Chris@47: template <> struct BuilderFor_<AnyPointer, Kind::OTHER> { typedef AnyPointer::Builder Type; };
Chris@47: template <> struct ReaderFor_ <AnyStruct, Kind::OTHER> { typedef AnyStruct::Reader Type; };
Chris@47: template <> struct BuilderFor_<AnyStruct, Kind::OTHER> { typedef AnyStruct::Builder Type; };
Chris@47: 
Chris@47: template <>
Chris@47: struct Orphanage::GetInnerReader<AnyPointer, Kind::OTHER> {
Chris@47:   static inline _::PointerReader apply(const AnyPointer::Reader& t) {
Chris@47:     return t.reader;
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: struct Orphanage::GetInnerBuilder<AnyPointer, Kind::OTHER> {
Chris@47:   static inline _::PointerBuilder apply(AnyPointer::Builder& t) {
Chris@47:     return t.builder;
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: struct Orphanage::GetInnerReader<AnyStruct, Kind::OTHER> {
Chris@47:   static inline _::StructReader apply(const AnyStruct::Reader& t) {
Chris@47:     return t._reader;
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: struct Orphanage::GetInnerBuilder<AnyStruct, Kind::OTHER> {
Chris@47:   static inline _::StructBuilder apply(AnyStruct::Builder& t) {
Chris@47:     return t._builder;
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: struct Orphanage::GetInnerReader<AnyList, Kind::OTHER> {
Chris@47:   static inline _::ListReader apply(const AnyList::Reader& t) {
Chris@47:     return t._reader;
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: struct Orphanage::GetInnerBuilder<AnyList, Kind::OTHER> {
Chris@47:   static inline _::ListBuilder apply(AnyList::Builder& t) {
Chris@47:     return t._builder;
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: template <typename T>
Chris@47: inline BuilderFor<T> Orphan<AnyPointer>::getAs() {
Chris@47:   return _::OrphanGetImpl<T>::apply(builder);
Chris@47: }
Chris@47: template <typename T>
Chris@47: inline ReaderFor<T> Orphan<AnyPointer>::getAsReader() const {
Chris@47:   return _::OrphanGetImpl<T>::applyReader(builder);
Chris@47: }
Chris@47: template <typename T>
Chris@47: inline Orphan<T> Orphan<AnyPointer>::releaseAs() {
Chris@47:   return Orphan<T>(kj::mv(builder));
Chris@47: }
Chris@47: 
Chris@47: // Using AnyPointer as the template type should work...
Chris@47: 
Chris@47: template <>
Chris@47: inline typename AnyPointer::Reader AnyPointer::Reader::getAs<AnyPointer>() const {
Chris@47:   return *this;
Chris@47: }
Chris@47: template <>
Chris@47: inline typename AnyPointer::Builder AnyPointer::Builder::getAs<AnyPointer>() {
Chris@47:   return *this;
Chris@47: }
Chris@47: template <>
Chris@47: inline typename AnyPointer::Builder AnyPointer::Builder::initAs<AnyPointer>() {
Chris@47:   clear();
Chris@47:   return *this;
Chris@47: }
Chris@47: template <>
Chris@47: inline void AnyPointer::Builder::setAs<AnyPointer>(AnyPointer::Reader value) {
Chris@47:   return builder.copyFrom(value.reader);
Chris@47: }
Chris@47: template <>
Chris@47: inline void AnyPointer::Builder::adopt<AnyPointer>(Orphan<AnyPointer>&& orphan) {
Chris@47:   builder.adopt(kj::mv(orphan.builder));
Chris@47: }
Chris@47: template <>
Chris@47: inline Orphan<AnyPointer> AnyPointer::Builder::disownAs<AnyPointer>() {
Chris@47:   return Orphan<AnyPointer>(builder.disown());
Chris@47: }
Chris@47: template <>
Chris@47: inline Orphan<AnyPointer> Orphan<AnyPointer>::releaseAs() {
Chris@47:   return kj::mv(*this);
Chris@47: }
Chris@47: 
Chris@47: namespace _ {  // private
Chris@47: 
Chris@47: // Specialize PointerHelpers for AnyPointer.
Chris@47: 
Chris@47: template <>
Chris@47: struct PointerHelpers<AnyPointer, Kind::OTHER> {
Chris@47:   static inline AnyPointer::Reader get(PointerReader reader,
Chris@47:                                        const void* defaultValue = nullptr,
Chris@47:                                        uint defaultBytes = 0) {
Chris@47:     return AnyPointer::Reader(reader);
Chris@47:   }
Chris@47:   static inline AnyPointer::Builder get(PointerBuilder builder,
Chris@47:                                         const void* defaultValue = nullptr,
Chris@47:                                         uint defaultBytes = 0) {
Chris@47:     return AnyPointer::Builder(builder);
Chris@47:   }
Chris@47:   static inline void set(PointerBuilder builder, AnyPointer::Reader value) {
Chris@47:     AnyPointer::Builder(builder).set(value);
Chris@47:   }
Chris@47:   static inline void adopt(PointerBuilder builder, Orphan<AnyPointer>&& value) {
Chris@47:     builder.adopt(kj::mv(value.builder));
Chris@47:   }
Chris@47:   static inline Orphan<AnyPointer> disown(PointerBuilder builder) {
Chris@47:     return Orphan<AnyPointer>(builder.disown());
Chris@47:   }
Chris@47:   static inline _::PointerReader getInternalReader(const AnyPointer::Reader& reader) {
Chris@47:     return reader.reader;
Chris@47:   }
Chris@47:   static inline _::PointerBuilder getInternalBuilder(AnyPointer::Builder&& builder) {
Chris@47:     return builder.builder;
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: struct PointerHelpers<AnyStruct, Kind::OTHER> {
Chris@47:   static inline AnyStruct::Reader get(
Chris@47:       PointerReader reader, const word* defaultValue = nullptr) {
Chris@47:     return AnyStruct::Reader(reader.getStruct(defaultValue));
Chris@47:   }
Chris@47:   static inline AnyStruct::Builder get(
Chris@47:       PointerBuilder builder, const word* defaultValue = nullptr) {
Chris@47:     // TODO(someday): Allow specifying the size somehow?
Chris@47:     return AnyStruct::Builder(builder.getStruct(
Chris@47:         _::StructSize(0 * WORDS, 0 * POINTERS), defaultValue));
Chris@47:   }
Chris@47:   static inline void set(PointerBuilder builder, AnyStruct::Reader value) {
Chris@47:     builder.setStruct(value._reader);
Chris@47:   }
Chris@47:   static inline AnyStruct::Builder init(
Chris@47:       PointerBuilder builder, uint dataWordCount, uint pointerCount) {
Chris@47:     return AnyStruct::Builder(builder.initStruct(
Chris@47:         StructSize(dataWordCount * WORDS, pointerCount * POINTERS)));
Chris@47:   }
Chris@47: 
Chris@47:   // TODO(soon): implement these
Chris@47:   static void adopt(PointerBuilder builder, Orphan<AnyStruct>&& value);
Chris@47:   static Orphan<AnyStruct> disown(PointerBuilder builder);
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: struct PointerHelpers<AnyList, Kind::OTHER> {
Chris@47:   static inline AnyList::Reader get(
Chris@47:       PointerReader reader, const word* defaultValue = nullptr) {
Chris@47:     return AnyList::Reader(reader.getListAnySize(defaultValue));
Chris@47:   }
Chris@47:   static inline AnyList::Builder get(
Chris@47:       PointerBuilder builder, const word* defaultValue = nullptr) {
Chris@47:     return AnyList::Builder(builder.getListAnySize(defaultValue));
Chris@47:   }
Chris@47:   static inline void set(PointerBuilder builder, AnyList::Reader value) {
Chris@47:     builder.setList(value._reader);
Chris@47:   }
Chris@47:   static inline AnyList::Builder init(
Chris@47:       PointerBuilder builder, ElementSize elementSize, uint elementCount) {
Chris@47:     return AnyList::Builder(builder.initList(elementSize, elementCount * ELEMENTS));
Chris@47:   }
Chris@47:   static inline AnyList::Builder init(
Chris@47:       PointerBuilder builder, uint dataWordCount, uint pointerCount, uint elementCount) {
Chris@47:     return AnyList::Builder(builder.initStructList(
Chris@47:         elementCount * ELEMENTS, StructSize(dataWordCount * WORDS, pointerCount * POINTERS)));
Chris@47:   }
Chris@47: 
Chris@47:   // TODO(soon): implement these
Chris@47:   static void adopt(PointerBuilder builder, Orphan<AnyList>&& value);
Chris@47:   static Orphan<AnyList> disown(PointerBuilder builder);
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: struct OrphanGetImpl<AnyStruct, Kind::OTHER> {
Chris@47:   static inline AnyStruct::Builder apply(_::OrphanBuilder& builder) {
Chris@47:     return AnyStruct::Builder(builder.asStruct(_::StructSize(0 * WORDS, 0 * POINTERS)));
Chris@47:   }
Chris@47:   static inline AnyStruct::Reader applyReader(const _::OrphanBuilder& builder) {
Chris@47:     return AnyStruct::Reader(builder.asStructReader(_::StructSize(0 * WORDS, 0 * POINTERS)));
Chris@47:   }
Chris@47:   static inline void truncateListOf(_::OrphanBuilder& builder, ElementCount size) {
Chris@47:     builder.truncate(size, _::StructSize(0 * WORDS, 0 * POINTERS));
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: }  // namespace _ (private)
Chris@47: 
Chris@47: #if !CAPNP_LITE
Chris@47: 
Chris@47: template <typename T>
Chris@47: struct PipelineHook::FromImpl {
Chris@47:   static inline kj::Own<PipelineHook> apply(typename T::Pipeline&& pipeline) {
Chris@47:     return from(kj::mv(pipeline._typeless));
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: template <>
Chris@47: struct PipelineHook::FromImpl<AnyPointer> {
Chris@47:   static inline kj::Own<PipelineHook> apply(AnyPointer::Pipeline&& pipeline) {
Chris@47:     return kj::mv(pipeline.hook);
Chris@47:   }
Chris@47: };
Chris@47: 
Chris@47: template <typename Pipeline, typename T>
Chris@47: inline kj::Own<PipelineHook> PipelineHook::from(Pipeline&& pipeline) {
Chris@47:   return FromImpl<T>::apply(kj::fwd<Pipeline>(pipeline));
Chris@47: }
Chris@47: 
Chris@47: #endif  // !CAPNP_LITE
Chris@47: 
Chris@47: }  // namespace capnp
Chris@47: 
Chris@47: #endif  // CAPNP_ANY_H_