Class Error

crates/c-api/include/wasmtime/error.hh:26–55

* \brief Errors coming from Wasmtime * * This class represents an error that came from Wasmtime and contains a textual * description of the error that occurred. */

 * description of the error that occurred.
 */
class Error {
  WASMTIME_OWN_WRAPPER(Error, wasmtime_error);

  /// \brief Creates an error with the provided message.
  Error(const std::string &s) : ptr(wasmtime_error_new(s.c_str())) {}

  /// \brief Returns the error message associated with this error.
  std::string message() const {
    wasm_byte_vec_t msg_bytes;
    wasmtime_error_message(ptr.get(), &msg_bytes);
    auto ret = std::string(msg_bytes.data, msg_bytes.size);
    wasm_byte_vec_delete(&msg_bytes);
    return ret;
  }

  /// If this trap represents a call to `exit` for WASI, this will return the
  /// optional error code associated with the exit trap.
  std::optional<int32_t> i32_exit() const {
    int32_t status = 0;
    if (wasmtime_error_exit_status(ptr.get(), &status)) {
      return status;
    }
    return std::nullopt;
  }

  /// Returns the trace of WebAssembly frames associated with this error.
  ///
  /// Note that the `trace` cannot outlive this error object.
  Trace trace() const;
};

/// \brief Used to print an error.
inline std::ostream &operator<<(std::ostream &os, const Error &e) {