z3/src/math/polysat/log_helper.h

/*++
Copyright (c) 2021 Microsoft Corporation

Module Name:

    Logging support

Abstract:

    Utilities for logging.

Author:

    Nikolaj Bjorner (nbjorner) 2021-03-19
    Jakob Rath 2021-04-6

--*/
#pragma once

#include <iostream>
#include <sstream>
#include <utility>
#include "util/ref.h"
#include "util/util.h"

template <typename T>
struct show_deref_t {
    T const* ptr;
};

template <typename T>
std::ostream& operator<<(std::ostream& os, show_deref_t<T> s) {
    if (s.ptr)
        return os << *s.ptr;
    else
        return os << "<null>";
}

template <typename T>
show_deref_t<T> show_deref(T* ptr) {
    return show_deref_t<T>{ptr};
}

template <typename Ptr, typename T = typename std::remove_pointer<decltype(std::declval<Ptr>().get())>::type>
show_deref_t<T> show_deref(Ptr const& ptr) {
    return show_deref_t<T>{ptr.get()};
}

/// Fill with spaces to the right:
/// out << rpad(8, "hello")
/// writes "hello   ".
template <typename T>
struct rpad {
    unsigned width;
    T const& obj;
    rpad(unsigned width, T const& obj): width(width), obj(obj) {}
};

template <typename T>
std::ostream& operator<<(std::ostream& out, rpad<T> const& pad) {
    std::stringstream tmp;
    tmp << pad.obj;
    auto s = tmp.str();
    out << s;
    if (s.length() < pad.width)
        out << std::string(pad.width - s.length(), ' ');
    return out;
}