z3-src 503.2.2

Source distribution of the Z3 SMT solver, for use as a build dependency
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43

/*++
Copyright (c) 2007 Microsoft Corporation

Module Name:

    approx_nat.h

Abstract:

    Approximated natural numbers. It performs operations on the set [0, ..., 2^{n-2}, huge].
    Where huge represents all numbers greater than 2^{n-2}. 

Author:

    Leonardo (leonardo) 2008-01-11

Notes:

--*/
#pragma once

#include<ostream>
#include<climits>

class approx_nat {
    unsigned m_value = 0;
    static const unsigned m_limit = UINT_MAX >> 2;
public:
    approx_nat() = default;
    explicit approx_nat(unsigned val);
    bool is_huge() const { return m_value == UINT_MAX; }
    unsigned get_value() const { return m_value; }
    approx_nat & operator=(unsigned w);
    approx_nat & operator+=(unsigned w);
    approx_nat & operator+=(approx_nat const & w) { return operator+=(w.m_value); }
    approx_nat & operator*=(unsigned w);
    approx_nat & operator*=(approx_nat const & w) { return operator*=(w.m_value); }
    bool operator<(unsigned w) const { return !is_huge() && m_value < w; }
    bool operator<(approx_nat const & w) const { return !is_huge() && !w.is_huge() && m_value < w.m_value; }
};

std::ostream & operator<<(std::ostream & target, approx_nat const & w);