check.h

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// Copyright (c) 2019-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_UTIL_CHECK_H
#define BITCOIN_UTIL_CHECK_H

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <tinyformat.h>

#include <stdexcept>

class NonFatalCheckError : public std::runtime_error
{
    using std::runtime_error::runtime_error;
};

#define CHECK_NONFATAL(condition)                                 \
    do {                                                          \
        if (!(condition)) {                                       \
            throw NonFatalCheckError(                             \
                strprintf("%s:%d (%s)\n"                          \
                          "Internal bug detected: '%s'\n"         \
                          "You may report this issue here: %s\n", \
                    __FILE__, __LINE__, __func__,                 \
                    (#condition),                                 \
                    PACKAGE_BUGREPORT));                          \
        }                                                         \
    } while (false)

#if defined(NDEBUG)
#error "Cannot compile without assertions!"
#endif

template <typename T>
T get_pure_r_value(T&& val)
{
    return std::forward<T>(val);
}

#define Assert(val) ([&]() -> decltype(get_pure_r_value(val)) { auto&& check = (val); assert(#val && check); return std::forward<decltype(get_pure_r_value(val))>(check); }())

#ifdef ABORT_ON_FAILED_ASSUME
#define Assume(val) Assert(val)
#else
#define Assume(val) ((void)(val))
#endif

#endif // BITCOIN_UTIL_CHECK_H