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62d361071e
Fixes #2989. SWIG 3 seems to have an issue properly resolving `T::const_iterator::value_type` if that type itself is a `typedef`. This is for example the case in the `UnsatCore` class, which `typedef`s `const_iterator` to `std::vector<Expr>::const_iterator`. As a workaround, this commit changes the `JavaIteratorAdapter` class to take two template parameters, one of which is the `value_type`. The commit also adds a compile-time assertion that `T::const_iterator::value_type` can be converted to `value_type` to avoid nasty surprises. A nice side-effect of this solution is that explicit `typemap`s are not necessary anymore, so they are removed. Additionally, the commit adds a `toString()` method for the Java API of `UnsatCore` and adds examples that show and test the iteration over the unsat core and the statistics. Iterating over `Statistics` now returns instances of `Statistic` instead of `Object[]`, which is a bit cleaner and requires less glue code.
46 lines
1.5 KiB
Java
46 lines
1.5 KiB
Java
/********************* */
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/*! \file Statistics.java
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** \verbatim
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** Top contributors (to current version):
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** Andres Noetzli
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** This file is part of the CVC4 project.
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** Copyright (c) 2009-2019 by the authors listed in the file AUTHORS
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** in the top-level source directory) and their institutional affiliations.
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** All rights reserved. See the file COPYING in the top-level source
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** directory for licensing information.\endverbatim
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**
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** \brief An example of accessing CVC4's statistics using the Java API
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**
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** An example of accessing CVC4's statistics using the Java API.
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**/
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import edu.nyu.acsys.CVC4.*;
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import java.util.Iterator;
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public class Statistics {
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public static void main(String[] args) {
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System.loadLibrary("cvc4jni");
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ExprManager em = new ExprManager();
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SmtEngine smt = new SmtEngine(em);
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Type boolType = em.booleanType();
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Expr a = em.mkVar("A", boolType);
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Expr b = em.mkVar("B", boolType);
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// A ^ B
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smt.assertFormula(em.mkExpr(Kind.AND, a, b));
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Result res = smt.checkSat();
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// Get the statistics from the `SmtEngine` and iterate over them. The
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// `Statistics` class implements the `Iterable<Statistic>` interface. A
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// `Statistic` is a pair that consists of a name and an `SExpr` that stores
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// the value of the statistic.
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edu.nyu.acsys.CVC4.Statistics stats = smt.getStatistics();
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for (Statistic stat : stats) {
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System.out.println(stat.getFirst() + " = " + stat.getSecond());
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}
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}
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}
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