src/dawn/native/ErrorSink.h

// Copyright 2024 The Dawn & Tint Authors
//
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#ifndef SRC_DAWN_NATIVE_ERRORSINK_H_
#define SRC_DAWN_NATIVE_ERRORSINK_H_

#include <memory>
#include <utility>

#include "dawn/native/Error.h"
#include "dawn/native/ErrorData.h"

namespace dawn::native {

class ErrorSink {
  public:
    virtual ~ErrorSink() = default;

    // Variants of ConsumedError must use the returned boolean to handle failure cases since an
    // error may cause a fatal error and further execution may be undefined. This is especially
    // true for the ResultOrError variants.
    [[nodiscard]] bool ConsumedError(
        MaybeError maybeError,
        InternalErrorType additionalAllowedErrors = InternalErrorType::None) {
        if (DAWN_UNLIKELY(maybeError.IsError())) {
            ConsumeError(maybeError.AcquireError(), additionalAllowedErrors);
            return true;
        }
        return false;
    }

    template <typename... Args>
    [[nodiscard]] bool ConsumedError(MaybeError maybeError,
                                     InternalErrorType additionalAllowedErrors,
                                     const char* formatStr,
                                     const Args&... args) {
        if (DAWN_UNLIKELY(maybeError.IsError())) {
            std::unique_ptr<ErrorData> error = maybeError.AcquireError();
            if (error->GetType() == InternalErrorType::Validation) {
                error->AppendContext(formatStr, args...);
            }
            ConsumeError(std::move(error), additionalAllowedErrors);
            return true;
        }
        return false;
    }

    template <typename... Args>
    [[nodiscard]] bool ConsumedError(MaybeError maybeError,
                                     const char* formatStr,
                                     const Args&... args) {
        return ConsumedError(std::move(maybeError), InternalErrorType::None, formatStr, args...);
    }

    template <typename T>
    [[nodiscard]] bool ConsumedError(
        ResultOrError<T> resultOrError,
        T* result,
        InternalErrorType additionalAllowedErrors = InternalErrorType::None) {
        if (DAWN_UNLIKELY(resultOrError.IsError())) {
            ConsumeError(resultOrError.AcquireError(), additionalAllowedErrors);
            return true;
        }
        *result = resultOrError.AcquireSuccess();
        return false;
    }

    template <typename T, typename... Args>
    [[nodiscard]] bool ConsumedError(ResultOrError<T> resultOrError,
                                     T* result,
                                     InternalErrorType additionalAllowedErrors,
                                     const char* formatStr,
                                     const Args&... args) {
        if (DAWN_UNLIKELY(resultOrError.IsError())) {
            std::unique_ptr<ErrorData> error = resultOrError.AcquireError();
            if (error->GetType() == InternalErrorType::Validation) {
                error->AppendContext(formatStr, args...);
            }
            ConsumeError(std::move(error), additionalAllowedErrors);
            return true;
        }
        *result = resultOrError.AcquireSuccess();
        return false;
    }

    template <typename T, typename... Args>
    [[nodiscard]] bool ConsumedError(ResultOrError<T> resultOrError,
                                     T* result,
                                     const char* formatStr,
                                     const Args&... args) {
        return ConsumedError(std::move(resultOrError), result, InternalErrorType::None, formatStr,
                             args...);
    }

  private:
    virtual void ConsumeError(
        std::unique_ptr<ErrorData> error,
        InternalErrorType additionalAllowedErrors = InternalErrorType::None) = 0;
};

}  // namespace dawn::native

#endif  // SRC_DAWN_NATIVE_ERRORSINK_H_