Result.h

// Copyright (c) Stefano Cristiano
// SPDX-License-Identifier: MIT
#pragma once
#include "Compiler.h" // SC_LANGUAGE_LIKELY
namespace SC
{
struct SC_COMPILER_EXPORT Result;
 
struct [[nodiscard]] Result
{
    const char* message;
    explicit constexpr Result(bool result) : message(result ? nullptr : "Unspecified Error") {}
 
    template <int numChars>
    static constexpr Result Error(const char (&msg)[numChars])
    {
        return Result(msg);
    }
 
    static constexpr Result FromStableCharPointer(const char* msg) { return Result(msg); }
 
    constexpr operator bool() const { return message == nullptr; }
 
  private:
    explicit constexpr Result(const char* message) : message(message) {}
};
} // namespace SC
 
 
#define SC_TRY(expression)                                                                                             \
    {                                                                                                                  \
        if (auto _exprResConv = SC::Result(expression))                                                                \
            SC_LANGUAGE_LIKELY { (void)0; }                                                                            \
        else                                                                                                           \
        {                                                                                                              \
            return _exprResConv;                                                                                       \
        }                                                                                                              \
    }
 
#define SC_TRY_MSG(expression, failedMessage)                                                                          \
    if (not(expression))                                                                                               \
        SC_LANGUAGE_UNLIKELY { return SC::Result::Error(failedMessage); }