TypedPorts.h

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//===- TypedPorts.h - Strongly-typed ESI port wrappers ----------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// DO NOT EDIT!
// This file is distributed as part of an ESI package. The source for this file
// should always be modified within CIRCT.
//
//===----------------------------------------------------------------------===//
//
// Thin, non-owning wrappers around WriteChannelPort / ReadChannelPort that
// verify type compatibility at connect() time and provide strongly-typed
// write/read APIs. Purely additive — no changes to the untyped port classes.
//
//===----------------------------------------------------------------------===//
 
// NOLINTNEXTLINE(llvm-header-guard)
#ifndef ESI_TYPED_PORTS_H
#define ESI_TYPED_PORTS_H
 
#include "esi/Ports.h"
#include "esi/Services.h"
#include "esi/Types.h"
 
#include <cstdint>
#include <cstring>
#include <functional>
#include <future>
#include <stdexcept>
#include <string>
#include <string_view>
#include <type_traits>
#include <typeinfo>
 
namespace esi {
 
//===----------------------------------------------------------------------===//
// AcceleratorMismatchError — thrown for type mismatches and port-not-found.
//===----------------------------------------------------------------------===//
 
class AcceleratorMismatchError : public std::runtime_error {
public:
  using std::runtime_error::runtime_error;
};
 
//===----------------------------------------------------------------------===//
// Helpers: unwrap TypeAliasType and width-aware serialization.
//===----------------------------------------------------------------------===//
 
/// Unwrap TypeAliasType (possibly recursively) to get the underlying type.
inline const Type *unwrapTypeAlias(const Type *t) {
  while (auto *alias = dynamic_cast<const TypeAliasType *>(t))
    t = alias->getInnerType();
  return t;
}
 
/// Compute the wire byte count for a port type. Returns 0 if not a
/// BitVectorType (meaning sizeof(T) should be used instead).
/// Wire format info for a port type, cached at connect() time.
struct WireInfo {
  size_t bytes = 0; // (bitWidth+7)/8, or 0 if not a BitVectorType.
  size_t bitWidth = 0;
};
 
inline WireInfo getWireInfo(const Type *portType) {
  const Type *inner = unwrapTypeAlias(portType);
  if (auto *bv = dynamic_cast<const BitVectorType *>(inner))
    return {(bv->getWidth() + 7) / 8, bv->getWidth()};
  return {};
}
 
/// Pack a C++ integral value into a MessageData with the given wire byte count.
/// If wi.bytes is 0, falls back to sizeof(T).
template <typename T>
MessageData toMessageData(const T &data, WireInfo wi) {
  if constexpr (std::is_integral_v<T> && !std::is_same_v<T, bool>) {
    if (wi.bytes > 0 && wi.bytes != sizeof(T)) {
      std::vector<uint8_t> buf(wi.bytes, 0);
      std::memcpy(buf.data(), &data, std::min(wi.bytes, sizeof(T)));
      return MessageData(std::move(buf));
    }
  }
  return MessageData(reinterpret_cast<const uint8_t *>(&data), sizeof(T));
}
 
/// Unpack a MessageData into a C++ integral value with the given wire info.
/// If the wire size differs from sizeof(T), copies available bytes into
/// a zero-initialized value and sign-extends for signed types using the
/// actual bit width to locate the sign bit.
template <typename T>
T fromMessageData(const MessageData &msg, WireInfo wi) {
  if constexpr (std::is_integral_v<T> && !std::is_same_v<T, bool>) {
    if (wi.bytes > 0 && msg.getSize() == wi.bytes &&
        wi.bitWidth < sizeof(T) * 8) {
      // Copy wire bytes into a zero-initialized value.
      T val = 0;
      std::memcpy(&val, msg.getBytes(), std::min(wi.bytes, sizeof(T)));
      // Sign-extend for signed types if the sign bit is set.
      if constexpr (std::is_signed_v<T>) {
        size_t signBit = wi.bitWidth - 1;
        size_t signByte = signBit / 8;
        uint8_t signMask = uint8_t(1) << (signBit % 8);
        if (signByte < wi.bytes && (msg.getBytes()[signByte] & signMask)) {
          // Set all bits above the sign bit to 1.
          if (wi.bitWidth < sizeof(T) * 8)
            val |= static_cast<T>(~T(0)) << wi.bitWidth;
        }
      }
      return val;
    }
  }
  return *msg.as<T>();
}
 
//===----------------------------------------------------------------------===//
// Type-trait: detect T::_ESI_ID (a static constexpr std::string_view).
//===----------------------------------------------------------------------===//
 
template <typename T, typename = void>
struct has_esi_id : std::false_type {};
 
template <typename T>
struct has_esi_id<T, std::void_t<decltype(T::_ESI_ID)>>
    : std::is_convertible<decltype(T::_ESI_ID), std::string_view> {};
 
template <typename T>
inline constexpr bool has_esi_id_v = has_esi_id<T>::value;
 
//===----------------------------------------------------------------------===//
// verifyTypeCompatibility<T>(const Type *portType)
//
// Checks that the ESI runtime Type is compatible with the C++ type T.
// Dispatch order: _ESI_ID → void → bool → signed int → unsigned int → error.
//===----------------------------------------------------------------------===//
 
template <typename T>
void verifyTypeCompatibility(const Type *portType) {
  if (!portType)
    throw AcceleratorMismatchError("Port type is null");
 
  // Unwrap TypeAliasType to get the inner type for verification.
  portType = unwrapTypeAlias(portType);
 
  if constexpr (has_esi_id_v<T>) {
    // Highest priority: user-defined ESI ID string comparison.
    if (std::string_view(portType->getID()) != T::_ESI_ID)
      throw AcceleratorMismatchError(
          "ESI type mismatch: C++ type has _ESI_ID '" +
          std::string(T::_ESI_ID) + "' but port type is '" +
          portType->toString(/*oneLine=*/true) + "'");
  } else if constexpr (std::is_void_v<T>) {
    if (!dynamic_cast<const VoidType *>(portType))
      throw AcceleratorMismatchError("ESI type mismatch: expected VoidType for "
                                     "void, but port type is '" +
                                     portType->toString(/*oneLine=*/true) +
                                     "'");
  } else if constexpr (std::is_same_v<T, bool>) {
    // bool maps to signless i1, which is BitsType with width <= 1.
    auto *bits = dynamic_cast<const BitsType *>(portType);
    if (!bits || bits->getWidth() > 1)
      throw AcceleratorMismatchError(
          "ESI type mismatch: expected BitsType with width <= 1 for "
          "bool, but port type is '" +
          portType->toString(/*oneLine=*/true) + "'");
  } else if constexpr (std::is_integral_v<T> && std::is_signed_v<T>) {
    auto *sint = dynamic_cast<const SIntType *>(portType);
    if (!sint)
      throw AcceleratorMismatchError(
          "ESI type mismatch: expected SIntType for signed integer, "
          "but port type is '" +
          portType->toString(/*oneLine=*/true) + "'");
    if (sint->getWidth() > sizeof(T) * 8)
      throw AcceleratorMismatchError(
          "ESI type mismatch: SIntType width " +
          std::to_string(sint->getWidth()) + " does not fit in " +
          std::to_string(sizeof(T) * 8) + "-bit signed integer");
    // Require closest-size match: reject if a smaller C++ type would suffice.
    if (sizeof(T) > 1 && sint->getWidth() <= (sizeof(T) / 2) * 8)
      throw AcceleratorMismatchError("ESI type mismatch: SIntType width " +
                                     std::to_string(sint->getWidth()) +
                                     " should use a smaller C++ type than " +
                                     std::to_string(sizeof(T) * 8) + "-bit");
  } else if constexpr (std::is_integral_v<T> && std::is_unsigned_v<T>) {
    // Accept UIntType (uiM) or BitsType (iM, signless).
    auto *uintPort = dynamic_cast<const UIntType *>(portType);
    auto *bits = dynamic_cast<const BitsType *>(portType);
    if (!uintPort && !bits)
      throw AcceleratorMismatchError(
          "ESI type mismatch: expected UIntType or BitsType for unsigned "
          "integer, but port type is '" +
          portType->toString(/*oneLine=*/true) + "'");
    uint64_t width = uintPort ? uintPort->getWidth() : bits->getWidth();
    if (width > sizeof(T) * 8)
      throw AcceleratorMismatchError(
          "ESI type mismatch: bit width " + std::to_string(width) +
          " does not fit in " + std::to_string(sizeof(T) * 8) +
          "-bit unsigned integer");
    // Require closest-size match: reject if a smaller C++ type would suffice.
    if (sizeof(T) > 1 && width <= (sizeof(T) / 2) * 8)
      throw AcceleratorMismatchError("ESI type mismatch: bit width " +
                                     std::to_string(width) +
                                     " should use a smaller C++ type than " +
                                     std::to_string(sizeof(T) * 8) + "-bit");
  } else {
    throw AcceleratorMismatchError(
        std::string("Cannot verify type compatibility for C++ type '") +
        typeid(T).name() + "' against ESI port type '" +
        portType->toString(/*oneLine=*/true) + "'");
  }
}
 
//===----------------------------------------------------------------------===//
// TypedWritePort<T, CheckValue>
//
// When CheckValue is true, write() and tryWrite() verify that the value fits
// in the ESI port's actual bit width before sending.
//===----------------------------------------------------------------------===//
 
template <typename T, bool CheckValue = false>
class TypedWritePort {
public:
  explicit TypedWritePort(WriteChannelPort &port) : inner(&port) {}
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedWritePort(WriteChannelPort *port) : inner(port) {}
 
  void connect(const ChannelPort::ConnectOptions &opts = {}) {
    if (!inner)
      throw AcceleratorMismatchError("TypedWritePort: null port pointer");
    verifyTypeCompatibility<T>(inner->getType());
    wireInfo_ = getWireInfo(inner->getType());
    inner->connect(opts);
  }
 
  void write(const T &data) {
    if constexpr (CheckValue)
      checkValueRange(data);
    inner->write(toMessageData(data, wireInfo_));
  }
 
  bool tryWrite(const T &data) {
    if constexpr (CheckValue)
      checkValueRange(data);
    return inner->tryWrite(toMessageData(data, wireInfo_));
  }
 
  bool flush() { return inner->flush(); }
  void disconnect() { inner->disconnect(); }
  bool isConnected() const { return inner && inner->isConnected(); }
 
  WriteChannelPort &raw() { return *inner; }
  const WriteChannelPort &raw() const { return *inner; }
 
private:
  WriteChannelPort *inner;
  WireInfo wireInfo_;
 
  void checkValueRange(const T &data) {
    static_assert(std::is_integral_v<T>,
                  "Value range checking only supported for integral types");
    const Type *pt = unwrapTypeAlias(inner->getType());
    auto *bvType = dynamic_cast<const BitVectorType *>(pt);
    if (!bvType)
      return;
    uint64_t width = bvType->getWidth();
    if (width >= sizeof(T) * 8)
      return; // Full-width; any value is valid.
    if constexpr (std::is_signed_v<T>) {
      int64_t minVal = -(int64_t(1) << (width - 1));
      int64_t maxVal = (int64_t(1) << (width - 1)) - 1;
      if (data < minVal || data > maxVal)
        throw AcceleratorMismatchError(
            "Value " + std::to_string(data) + " out of range for " +
            std::to_string(width) + "-bit signed type");
    } else {
      uint64_t maxVal = (uint64_t(1) << width) - 1;
      if (static_cast<uint64_t>(data) > maxVal)
        throw AcceleratorMismatchError(
            "Value " + std::to_string(data) + " out of range for " +
            std::to_string(width) + "-bit unsigned type");
    }
  }
};
 
/// Specialization for void — write takes no data argument.
template <>
class TypedWritePort<void> {
public:
  explicit TypedWritePort(WriteChannelPort &port) : inner(&port) {}
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedWritePort(WriteChannelPort *port) : inner(port) {}
 
  void connect(const ChannelPort::ConnectOptions &opts = {}) {
    if (!inner)
      throw AcceleratorMismatchError("TypedWritePort: null port pointer");
    verifyTypeCompatibility<void>(inner->getType());
    inner->connect(opts);
  }
 
  void write() {
    uint8_t zero = 0;
    inner->write(MessageData(&zero, 1));
  }
 
  bool tryWrite() {
    uint8_t zero = 0;
    return inner->tryWrite(MessageData(&zero, 1));
  }
 
  bool flush() { return inner->flush(); }
  void disconnect() { inner->disconnect(); }
  bool isConnected() const { return inner && inner->isConnected(); }
 
  WriteChannelPort &raw() { return *inner; }
  const WriteChannelPort &raw() const { return *inner; }
 
private:
  WriteChannelPort *inner;
};
 
//===----------------------------------------------------------------------===//
// TypedReadPort<T>
//===----------------------------------------------------------------------===//
 
template <typename T>
class TypedReadPort {
public:
  explicit TypedReadPort(ReadChannelPort &port) : inner(&port) {}
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedReadPort(ReadChannelPort *port) : inner(port) {}
 
  void connect(const ChannelPort::ConnectOptions &opts = {}) {
    if (!inner)
      throw AcceleratorMismatchError("TypedReadPort: null port pointer");
    verifyTypeCompatibility<T>(inner->getType());
    wireInfo_ = getWireInfo(inner->getType());
    inner->connect(opts);
  }
 
  void connect(std::function<bool(const T &)> callback,
               const ChannelPort::ConnectOptions &opts = {}) {
    if (!inner)
      throw AcceleratorMismatchError("TypedReadPort: null port pointer");
    verifyTypeCompatibility<T>(inner->getType());
    wireInfo_ = getWireInfo(inner->getType());
    WireInfo wb = wireInfo_;
    inner->connect(
        [cb = std::move(callback), wb](MessageData data) -> bool {
          return cb(fromMessageData<T>(data, wb));
        },
        opts);
  }
 
  T read() {
    MessageData outData;
    inner->read(outData);
    return fromMessageData<T>(outData, wireInfo_);
  }
 
  std::future<T> readAsync() {
    WireInfo wb = wireInfo_;
    auto innerFuture = inner->readAsync();
    return std::async(std::launch::deferred,
                      [f = std::move(innerFuture), wb]() mutable -> T {
                        MessageData data = f.get();
                        return fromMessageData<T>(data, wb);
                      });
  }
 
  void disconnect() { inner->disconnect(); }
  bool isConnected() const { return inner && inner->isConnected(); }
 
  ReadChannelPort &raw() { return *inner; }
  const ReadChannelPort &raw() const { return *inner; }
 
private:
  ReadChannelPort *inner;
  WireInfo wireInfo_;
};
 
/// Specialization for void — read discards data and returns nothing.
template <>
class TypedReadPort<void> {
public:
  explicit TypedReadPort(ReadChannelPort &port) : inner(&port) {}
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedReadPort(ReadChannelPort *port) : inner(port) {}
 
  void connect(const ChannelPort::ConnectOptions &opts = {}) {
    if (!inner)
      throw AcceleratorMismatchError("TypedReadPort: null port pointer");
    verifyTypeCompatibility<void>(inner->getType());
    inner->connect(opts);
  }
 
  void connect(std::function<bool()> callback,
               const ChannelPort::ConnectOptions &opts = {}) {
    if (!inner)
      throw AcceleratorMismatchError("TypedReadPort: null port pointer");
    verifyTypeCompatibility<void>(inner->getType());
    inner->connect(
        [cb = std::move(callback)](MessageData) -> bool { return cb(); }, opts);
  }
 
  void read() {
    MessageData outData;
    inner->read(outData);
  }
 
  std::future<void> readAsync() {
    auto innerFuture = inner->readAsync();
    return std::async(
        std::launch::deferred,
        [f = std::move(innerFuture)]() mutable -> void { f.get(); });
  }
 
  void disconnect() { inner->disconnect(); }
  bool isConnected() const { return inner && inner->isConnected(); }
 
  ReadChannelPort &raw() { return *inner; }
  const ReadChannelPort &raw() const { return *inner; }
 
private:
  ReadChannelPort *inner;
};
 
//===----------------------------------------------------------------------===//
// TypedFunction<ArgT, ResultT>
//
// Non-owning wrapper around FuncService::Function that provides strongly-typed
// call() and connect() APIs. Implicitly constructible from Function* (the
// return type of BundlePort::getAs<FuncService::Function>()).
//===----------------------------------------------------------------------===//
 
template <typename ArgT, typename ResultT>
class TypedFunction {
public:
  /// Implicit conversion from Function* (returned by getAs<>()).
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedFunction(services::FuncService::Function *func) : inner(func) {}
 
  void connect() {
    if (!inner)
      throw AcceleratorMismatchError(
          "TypedFunction: null Function pointer (getAs failed or wrong type)");
    verifyTypeCompatibility<ArgT>(inner->getArgType());
    verifyTypeCompatibility<ResultT>(inner->getResultType());
    argWireInfo_ = getWireInfo(inner->getArgType());
    resWireInfo_ = getWireInfo(inner->getResultType());
    inner->connect();
  }
 
  std::future<ResultT> call(const ArgT &arg) {
    WireInfo rwb = resWireInfo_;
    auto f = inner->call(toMessageData(arg, argWireInfo_));
    return std::async(std::launch::deferred,
                      [fut = std::move(f), rwb]() mutable -> ResultT {
                        MessageData data = fut.get();
                        return fromMessageData<ResultT>(data, rwb);
                      });
  }
 
  services::FuncService::Function &raw() { return *inner; }
  const services::FuncService::Function &raw() const { return *inner; }
 
private:
  services::FuncService::Function *inner;
  WireInfo argWireInfo_;
  WireInfo resWireInfo_;
};
 
/// Partial specialization: void argument, typed result.
template <typename ResultT>
class TypedFunction<void, ResultT> {
public:
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedFunction(services::FuncService::Function *func) : inner(func) {}
 
  void connect() {
    if (!inner)
      throw AcceleratorMismatchError(
          "TypedFunction: null Function pointer (getAs failed or wrong type)");
    verifyTypeCompatibility<void>(inner->getArgType());
    verifyTypeCompatibility<ResultT>(inner->getResultType());
    inner->connect();
  }
 
  std::future<ResultT> call() {
    uint8_t zero = 0;
    const Type *resType = inner->getResultType();
    auto f = inner->call(MessageData(&zero, 1));
    return std::async(std::launch::deferred,
                      [fut = std::move(f), resType]() mutable -> ResultT {
                        MessageData data = fut.get();
                        return fromMessageData<ResultT>(data, resType);
                      });
  }
 
  services::FuncService::Function &raw() { return *inner; }
  const services::FuncService::Function &raw() const { return *inner; }
 
private:
  services::FuncService::Function *inner;
};
 
/// Partial specialization: typed argument, void result.
template <typename ArgT>
class TypedFunction<ArgT, void> {
public:
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedFunction(services::FuncService::Function *func) : inner(func) {}
 
  void connect() {
    if (!inner)
      throw AcceleratorMismatchError(
          "TypedFunction: null Function pointer (getAs failed or wrong type)");
    verifyTypeCompatibility<ArgT>(inner->getArgType());
    verifyTypeCompatibility<void>(inner->getResultType());
    argWireInfo_ = getWireInfo(inner->getArgType());
    inner->connect();
  }
 
  std::future<void> call(const ArgT &arg) {
    auto f = inner->call(toMessageData(arg, argWireInfo_));
    return std::async(std::launch::deferred,
                      [fut = std::move(f)]() mutable -> void { fut.get(); });
  }
 
  services::FuncService::Function &raw() { return *inner; }
  const services::FuncService::Function &raw() const { return *inner; }
 
private:
  services::FuncService::Function *inner;
  WireInfo argWireInfo_;
};
 
/// Full specialization: void argument, void result.
template <>
class TypedFunction<void, void> {
public:
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedFunction(services::FuncService::Function *func) : inner(func) {}
 
  void connect() {
    if (!inner)
      throw AcceleratorMismatchError(
          "TypedFunction: null Function pointer (getAs failed or wrong type)");
    verifyTypeCompatibility<void>(inner->getArgType());
    verifyTypeCompatibility<void>(inner->getResultType());
    inner->connect();
  }
 
  std::future<void> call() {
    uint8_t zero = 0;
    auto f = inner->call(MessageData(&zero, 1));
    return std::async(std::launch::deferred,
                      [fut = std::move(f)]() mutable -> void { fut.get(); });
  }
 
  services::FuncService::Function &raw() { return *inner; }
  const services::FuncService::Function &raw() const { return *inner; }
 
private:
  services::FuncService::Function *inner;
};
 
//===----------------------------------------------------------------------===//
// TypedCallback<ArgT, ResultT>
//
// Non-owning wrapper around CallService::Callback that provides strongly-typed
// connect() and automatic MessageData conversion. Implicitly constructible
// from Callback* (the return type of BundlePort::getAs<Callback>()).
//===----------------------------------------------------------------------===//
 
template <typename ArgT, typename ResultT>
class TypedCallback {
public:
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedCallback(services::CallService::Callback *cb) : inner(cb) {}
 
  void connect(std::function<ResultT(const ArgT &)> callback,
               bool quick = false) {
    if (!inner)
      throw AcceleratorMismatchError(
          "TypedCallback: null Callback pointer (getAs failed or wrong type)");
    verifyTypeCompatibility<ArgT>(inner->getArgType());
    verifyTypeCompatibility<ResultT>(inner->getResultType());
    inner->connect(
        [cb = std::move(callback), argType = inner->getArgType(),
         resType = inner->getResultType()](
            const MessageData &argData) -> MessageData {
          ResultT result = cb(fromMessageData<ArgT>(argData, argType));
          return toMessageData(result, resType);
        },
        quick);
  }
 
  services::CallService::Callback &raw() { return *inner; }
  const services::CallService::Callback &raw() const { return *inner; }
 
private:
  services::CallService::Callback *inner;
};
 
/// Partial specialization: void argument, typed result.
template <typename ResultT>
class TypedCallback<void, ResultT> {
public:
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedCallback(services::CallService::Callback *cb) : inner(cb) {}
 
  void connect(std::function<ResultT()> callback, bool quick = false) {
    if (!inner)
      throw AcceleratorMismatchError(
          "TypedCallback: null Callback pointer (getAs failed or wrong type)");
    verifyTypeCompatibility<void>(inner->getArgType());
    verifyTypeCompatibility<ResultT>(inner->getResultType());
    WireInfo rwb = getWireInfo(inner->getResultType());
    inner->connect(
        [cb = std::move(callback), rwb](const MessageData &) -> MessageData {
          ResultT result = cb();
          return toMessageData(result, rwb);
        },
        quick);
  }
 
  services::CallService::Callback &raw() { return *inner; }
  const services::CallService::Callback &raw() const { return *inner; }
 
private:
  services::CallService::Callback *inner;
};
 
/// Partial specialization: typed argument, void result.
template <typename ArgT>
class TypedCallback<ArgT, void> {
public:
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedCallback(services::CallService::Callback *cb) : inner(cb) {}
 
  void connect(std::function<void(const ArgT &)> callback, bool quick = false) {
    if (!inner)
      throw AcceleratorMismatchError(
          "TypedCallback: null Callback pointer (getAs failed or wrong type)");
    verifyTypeCompatibility<ArgT>(inner->getArgType());
    verifyTypeCompatibility<void>(inner->getResultType());
    inner->connect(
        [cb = std::move(callback), argType = inner->getArgType()](
            const MessageData &argData) -> MessageData {
          cb(fromMessageData<ArgT>(argData, argType));
          uint8_t zero = 0;
          return MessageData(&zero, 1);
        },
        quick);
  }
 
  services::CallService::Callback &raw() { return *inner; }
  const services::CallService::Callback &raw() const { return *inner; }
 
private:
  services::CallService::Callback *inner;
};
 
/// Full specialization: void argument, void result.
template <>
class TypedCallback<void, void> {
public:
  // NOLINTNEXTLINE(google-explicit-constructor)
  TypedCallback(services::CallService::Callback *cb) : inner(cb) {}
 
  void connect(std::function<void()> callback, bool quick = false) {
    if (!inner)
      throw AcceleratorMismatchError(
          "TypedCallback: null Callback pointer (getAs failed or wrong type)");
    verifyTypeCompatibility<void>(inner->getArgType());
    verifyTypeCompatibility<void>(inner->getResultType());
    inner->connect(
        [cb = std::move(callback)](const MessageData &) -> MessageData {
          cb();
          uint8_t zero = 0;
          return MessageData(&zero, 1);
        },
        quick);
  }
 
  services::CallService::Callback &raw() { return *inner; }
  const services::CallService::Callback &raw() const { return *inner; }
 
private:
  services::CallService::Callback *inner;
};
 
} // namespace esi
 
#endif // ESI_TYPED_PORTS_H