2 // IntervalEnvironment.cs
5 // Alexander Chebaturkin (chebaturkin@gmail.com)
7 // Copyright (C) 2012 Alexander Chebaturkin
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using Mono.CodeContracts.Static.Lattices;
33 namespace Mono.CodeContracts.Static.Analysis.Numerical {
34 class IntervalEnvironment<TVar, TExpr> :
35 IntervalEnvironmentBase<TVar, TExpr, Interval, Rational>
36 where TVar : IEquatable<TVar> {
37 static IntervalAssumer<TVar, TExpr> cachedAssumer;
39 public IntervalEnvironment (IExpressionDecoder<TVar, TExpr> decoder)
45 (IExpressionDecoder<TVar, TExpr> decoder,
46 EnvironmentDomain<TVar, Interval> varsToInterval)
47 : base (decoder, varsToInterval)
51 public override IntervalAssumerBase<TVar, TExpr, Interval, Rational>
52 Assumer { get { return cachedAssumer ?? (cachedAssumer = new IntervalAssumer<TVar, TExpr> ()); } }
54 public override IntervalContextBase<Interval, Rational> Context { get { return IntervalContext.Instance; } }
56 protected override IntervalEnvironmentBase<TVar, TExpr, Interval, Rational> NewInstance
57 (EnvironmentDomain<TVar, Interval> varsToIntervals)
59 return new IntervalEnvironment<TVar, TExpr> (Decoder, varsToIntervals);
62 public override IntervalEnvironmentBase<TVar, TExpr, Interval, Rational> AssumeVariableIn
63 (TVar var, Interval interval)
65 return RefineVariable (var, interval);