z3-src 416.0.2

Source distribution of the Z3 SMT solver, for use as a build dependency
Documentation 
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/*++
Copyright (c) 2006 Microsoft Corporation

Module Name:

    sign.h

Abstract:

    Sign

Author:

    Nikolaj Bjorner

--*/

#pragma once

typedef enum { sign_neg = -1, sign_zero = 0, sign_pos = 1} sign;
static inline sign operator-(sign s) { switch (s) { case sign_neg: return sign_pos; case sign_pos: return sign_neg; default: return sign_zero; } };
static inline sign to_sign(int s) { return s == 0 ? sign_zero : (s > 0 ? sign_pos : sign_neg); }
static inline sign operator*(sign a, sign b) { return to_sign((int)a * (int)b); }
static inline bool is_zero(sign s) { return s == sign_zero; }