/// <summary>
/// Constructeur par défaut
/// </summary>
public CalculateurIhm()
{
_analyseur = new AnalyseurMath();
_listeFonction = new ListeFonction();
_variables = new Variables();
_evaluateur = new EvaluationVisitor(_variables, _listeFonction, TypeAngle.Degres);
}
public object Evaluate()
{
EvaluationVisitor visitor = new EvaluationVisitor();
visitor.TaxFunction += TaxFunction;
visitor.TaxWithPointFunction += TaxWithPointFunction;
visitor.AnnualBonusTaxFunction += AnnualBonusTaxFunction;
visitor.ForeignTaxFunction += ForeignTaxFunction;
visitor.IsSalaryEndDateMonthEquelFunction += IsSalaryEndDateMonthEquelFunction;
visitor.DoubleSalaryFunction += DoubleSalaryFunction;
visitor.AnnualBonusForeignTaxFunction += AnnualBonusForeignTaxFunction;
visitor.EvaluateFunction += EvaluateFunction;
visitor.EvaluateParameter += EvaluateParameter;
visitor.Parameters = parameters;
//LogicalExpression.Create(Parse(expression)).Accept(visitor);
//modify by wsl
CommonTree ct = Parse(expression);
//将表达式转化成LogicalExpression对象
LogicalExpression le = LogicalExpression.Create(ct);
//计算表达式
le.Accept(visitor);
return(visitor.Result);
}
public void MathExpression_Arithmetic_Division_Throws_If_Denominator_Is_Zero()
{
var expression = MathExpressionBuilder.CreateArithmetic(ArithmeticOperator.Division, 42, 0);
var visitor = new EvaluationVisitor();
var message = Assert.Throws<MathExpressionException>(() => visitor.Evaluate(expression, new MathExpressionContext())).Message;
Assert.AreEqual("Cannot divide by zero.", message);
}
public void MathExpression_Arithmetic_Expression_Throws_When_Evaluated_If_Operator_Is_Unknown()
{
var op = ((ArithmeticOperator)int.MaxValue);
var expression = MathExpressionBuilder.CreateArithmetic(op, 42, 0);
var visitor = new EvaluationVisitor();
var exception = Assert.Throws<MathExpressionException>(() => visitor.Evaluate(expression, new MathExpressionContext()));
Assert.AreEqual("Encountered unknown arithmetic operator.", exception.Details);
}
public CalculateurModel()
{
_analyseur = new AnalyseurMath();
_listeFonction = new ListeFonction();
_variables = new Variables();
_variables.Ajouter("PI", Math.PI);
_variables.Ajouter("E", Math.E);
_evaluateur = new EvaluationVisitor(_variables, _listeFonction, TypeAngle.Degres);
}
public void EvaluationVisit(string input, int value)
{
var lexer = new Lexer(input);
var parser = new Parser(lexer);
INode tree = parser.Parse();
var visitor = new EvaluationVisitor();
int result = visitor.Visit(tree);
Assert.That(result, Is.EqualTo(value));
}
public object Evaluate()
{
EvaluationVisitor visitor = new EvaluationVisitor();
visitor.EvaluateFunction += EvaluateFunction;
visitor.EvaluateParameter += EvaluateParameter;
visitor.Parameters = parameters;
LogicalExpression.Create(Parse(expression)).Accept(visitor);
return(visitor.Result);
}
public void LogicalExpressionShouldHandlePrecedence()
{
BinaryExpresssion expression = LogicalExpression.Create(Parse("3 * (5 + 2)")) as BinaryExpresssion;
EvaluationVisitor visitor = new EvaluationVisitor();
visitor.Visit(expression);
Assert.AreEqual(21, visitor.Result);
Assert.AreEqual(40, new Expression("5 * 2 ^ 3").Evaluate());
}
public void LogicalExpressionShouldCreateInteger()
{
Value expression = LogicalExpression.Create(Parse("2")) as Value;
Assert.IsNotNull(expression);
Assert.AreEqual("2", expression.Text);
EvaluationVisitor visitor = new EvaluationVisitor();
visitor.Visit(expression);
Assert.AreEqual(2, visitor.Result);
}
public void LogicalExpressionShouldCreateNot()
{
UnaryExpression expression = LogicalExpression.Create(Parse("not true")) as UnaryExpression;
Assert.IsNotNull(expression);
Assert.AreEqual(typeof(Value), expression.Expression.GetType());
EvaluationVisitor visitor = new EvaluationVisitor();
visitor.Visit(expression);
Assert.AreEqual(false, visitor.Result);
}
public void LogicalExpressionShouldCreateTimes()
{
BinaryExpresssion expression = LogicalExpression.Create(Parse("3 * 2")) as BinaryExpresssion;
Assert.IsNotNull(expression);
Assert.AreEqual(BinaryExpressionType.Times, expression.Type);
EvaluationVisitor visitor = new EvaluationVisitor();
visitor.Visit(expression);
Assert.AreEqual(6, visitor.Result);
}
/// <inheritdoc/>
public override void VisitObjectCreateExpression(ObjectCreateExpression syntax)
{
var type = _context.GetType(syntax.Type.ToString());
if (type != null)
{
var arguments = syntax.Arguments
.Select(arg =>
{
var visitor = new EvaluationVisitor(_context, _visitedMethods);
arg.AcceptVisitor(visitor);
return(visitor.Result);
})
.ToArray();
Result = Activator.CreateInstance(type, arguments);
}
}
/// <inheritdoc/>
public override void VisitInvocationExpression(InvocationExpression syntax)
{
var methodToEval = GetMethodToEval(syntax, _context, _declaringTypeFilter);
if (methodToEval == null)
{
throw new NotSupportedException($"Encountered syntax that is unable to be evaluated: {syntax}");
}
var arguments = syntax.Arguments
.Select(arg =>
{
var visitor = new EvaluationVisitor(_context, _visitedMethods);
arg.AcceptVisitor(visitor);
return(visitor.Result);
})
.ToArray();
Result = _context.Invoke(methodToEval, arguments);
}
/// <summary>
/// Attempts to visit an <see cref="InvocationExpression"/> node
/// </summary>
/// <param name="syntax">The node to evaluate</param>
/// <returns>True if it was visited, otherwise false</returns>
public bool TryVisit(InvocationExpression syntax)
{
var methodToEval = GetMethodToEval(syntax, _context, _declaringTypeFilter);
if (methodToEval != null)
{
var arguments = syntax.Arguments
.Select(arg =>
{
// allow all methods
var visitor = new EvaluationVisitor(_context, _visitedMethods, t => true);
arg.AcceptVisitor(visitor);
return(visitor.Result);
})
.ToArray();
Result = _context.Invoke(methodToEval, arguments);
return(true);
}
return(false);
}
public void MathExpression_Can_Evaluate_Arithmetic_Multiplication_Expression()
{
var expression = MathExpressionBuilder.CreateArithmetic(ArithmeticOperator.Multiplication, 21, 2);
var visitor = new EvaluationVisitor();
Assert.AreEqual(42, visitor.Evaluate(expression, new MathExpressionContext()));
}
public object Evaluate()
{
if (HasErrors())
{
throw new EvaluationException(Error, ErrorException);
}
if (ParsedExpression == null)
{
ParsedExpression = Compile(OriginalExpression, (Options & EvaluateOptions.NoCache) == EvaluateOptions.NoCache);
}
var visitor = new EvaluationVisitor(Options);
visitor.EvaluateFunction += EvaluateFunction;
visitor.EvaluateParameter += EvaluateParameter;
visitor.Parameters = Parameters;
// Add a "null" parameter which returns null if configured to do so
// Configured as an option to ensure no breaking changes for historical use
if ((Options & EvaluateOptions.AllowNullParameter) == EvaluateOptions.AllowNullParameter && !visitor.Parameters.ContainsKey("null"))
{
visitor.Parameters["null"] = null;
}
// if array evaluation, execute the same expression multiple times
if ((Options & EvaluateOptions.IterateParameters) == EvaluateOptions.IterateParameters)
{
int size = -1;
ParametersBackup = new Dictionary <string, object>();
foreach (string key in Parameters.Keys)
{
ParametersBackup.Add(key, Parameters[key]);
}
ParameterEnumerators = new Dictionary <string, IEnumerator>();
foreach (object parameter in Parameters.Values)
{
if (parameter is IEnumerable)
{
int localsize = 0;
foreach (object o in (IEnumerable)parameter)
{
localsize++;
}
if (size == -1)
{
size = localsize;
}
else if (localsize != size)
{
throw new EvaluationException("When IterateParameters option is used, IEnumerable parameters must have the same number of items");
}
}
}
foreach (string key in Parameters.Keys)
{
var parameter = Parameters[key] as IEnumerable;
if (parameter != null)
{
ParameterEnumerators.Add(key, parameter.GetEnumerator());
}
}
var results = new List <object>();
for (int i = 0; i < size; i++)
{
foreach (string key in ParameterEnumerators.Keys)
{
IEnumerator enumerator = ParameterEnumerators[key];
enumerator.MoveNext();
Parameters[key] = enumerator.Current;
}
ParsedExpression.Accept(visitor);
results.Add(visitor.Result);
}
return(results);
}
ParsedExpression.Accept(visitor);
return(visitor.Result);
}
private string DebugToString(EvaluationVisitor debugExpectedResults)
{
var sb = new StringBuilder();
bool allTrue = true;
sb.AppendLine("SolverNode " + DebugOriginChain(4));
foreach (ScalarConstraint c in Constraints) {
string result;
try {
bool isTrue = c.Accept(debugExpectedResults, Ig.nore);
result = isTrue ? " Y " : " N [" + c.Expr.Accept(debugExpectedResults, Ig.nore).ToString(CultureInfo.InvariantCulture) + "]";
allTrue &= isTrue;
} catch (NotSupportedException) {
result = " ? ";
}
sb.Append(result);
sb.AppendLine(c.ToString().WithParDepth(3));
}
foreach (var c in ClosedVariables.Values) {
sb.Append(" ");
sb.AppendLine(c.ToString());
}
sb.AppendLine(debugExpectedResults.DebugVariableValuesAsString());
return (allTrue ? "+" : "-") + sb;
}
private static bool DebugIsTrueOrUnknown(AbstractConstraint c, EvaluationVisitor debugExpectedResults)
{
try {
return c.Accept(debugExpectedResults, Ig.nore);
} catch (NotSupportedException) {
return true;
}
}
public static IEnumerable<SolverNode> SolverStep(IEnumerable<SolverNode> open,
IDictionary<IVariable, VariableWithValue> previousValues,
out SolverNode solutionOrNull,
EvaluationVisitor debugExpectedResults = null)
{
double minRank = open.Min(cs => cs.Rank);
SolverNode selected;
if (debugExpectedResults == null) {
selected = open.First(cs => cs.Rank <= minRank);
} else {
// The debugExpectedResults are intended to steer the solver only on
// nodes that match the expected result!
selected = open.FirstOrDefault(cs =>
cs.Constraints.All(c => DebugIsTrueOrUnknown(c, debugExpectedResults))
);
if (selected == null) {
Debug.WriteLine("---- All open nodes do not match expected results:");
foreach (var node in open) {
Debug.WriteLine(node.DebugToString(debugExpectedResults));
}
throw new InvalidOperationException("No node matches expected results");
}
}
IEnumerable<SolverNode> expanded = selected.Expand( /*previousValues*/).ToArray();
if (!expanded.Any()) {
// Dead node - register in dead nodes.
DebugDeadNodes.Add(selected);
// ????
if (debugExpectedResults != null) {
Debug.WriteLine(".... Constraint state " + selected.DebugToString(debugExpectedResults));
}
}
//IEnumerable<SolverNode> newOpen = open.Except(selected).Concat(expandedSets);
IEnumerable<SolverNode> newOpen = expanded.Concat(open.Except(selected)).ToArray();
// Not really correct: We should also check whether all anchor variables have
// a single value. For the moment, in our tests, we live with this rough check.
solutionOrNull = expanded.FirstOrDefault(cs => cs.IsSolved());
return newOpen;
}
public void TestSquare2()
{
AbstractExpr p = new UnaryExpression(C(-0.5).C + V("a") + V("b") + V("c"), new Square());
// (a-0.5+b+c)²
// = a²-0.5a+ab+ac + -0.5a+0.25-0.5b-0.5c + ab-0.5b+b²+bc + ac-0.5c+bc+c²
// = a²-0.5a-0.5a+0.25 - 0.5b-0.5b+b² -0.5c-0.5c+c² + ab+ac+ab+bc+ac+bc
// = a²-a+0.25 + b²-b + c²-c + ab+ac+ab+bc+ac+bc
IPolynomial pa = Polynomial.CreatePolynomial(V("a"), 1, -1, 0.25);
IPolynomial pb = Polynomial.CreatePolynomial(V("b"), 1, -1, 0);
IPolynomial pc = Polynomial.CreatePolynomial(V("c"), 1, -1, 0);
AbstractExpr e = V("a").C * V("b") + V("a").C * V("c") + V("b").C * V("a") + V("b").C * V("c") + V("c").C * V("a") + V("c").C * V("b");
AbstractExpr expected = pa.C + (pb.C + (pc.C + e));
IAbstractExpr fold = Fold(p);
// We check by comparing values at a few places, as we do not know the exact
// order of the pairs in e.
for (double a = -3.5; a < 4; a++) {
for (double b = -3.5; b < 4; b++) {
for (double c = -3.5; c < 4; c++) {
var visitor = new EvaluationVisitor(new Dictionary<IVariable, double> { { V("a"), a }, { V("b"), b }, { V("c"), c } });
double f = fold.Accept(visitor);
double exp = expected.Accept(visitor);
Assert.AreEqual(exp, f, 1e-5);
}
}
}
}
public void MathExpression_Can_Evaluate_Constant_Expression()
{
var expression = new ConstantExpression("pi", Math.PI);
var visitor = new EvaluationVisitor();
Assert.AreEqual(Math.PI, visitor.Evaluate(expression, new MathExpressionContext()));
}
public async System.Threading.Tasks.Task <object> EvaluateAsync()
{
if (HasErrors())
{
throw new EvaluationException(Error);
}
if (ParsedExpression == null)
{
ParsedExpression = Compile(OriginalExpression, (Options & EvaluateOptions.NoCache) == EvaluateOptions.NoCache);
}
var visitor = new EvaluationVisitor(Options);
visitor.EvaluateFunctionAsync += EvaluateFunctionAsync;
visitor.EvaluateParameterAsync += EvaluateParameterAsync;
visitor.Parameters = Parameters;
// if array evaluation, execute the same expression multiple times
if ((Options & EvaluateOptions.IterateParameters) == EvaluateOptions.IterateParameters)
{
int size = -1;
ParametersBackup = new Dictionary <string, object>();
foreach (string key in Parameters.Keys)
{
ParametersBackup.Add(key, Parameters[key]);
}
ParameterEnumerators = new Dictionary <string, IEnumerator>();
foreach (object parameter in Parameters.Values)
{
if (parameter is IEnumerable)
{
int localsize = 0;
foreach (object o in (IEnumerable)parameter)
{
localsize++;
}
if (size == -1)
{
size = localsize;
}
else if (localsize != size)
{
throw new EvaluationException("When IterateParameters option is used, IEnumerable parameters must have the same number of items");
}
}
}
foreach (string key in Parameters.Keys)
{
var parameter = Parameters[key] as IEnumerable;
if (parameter != null)
{
ParameterEnumerators.Add(key, parameter.GetEnumerator());
}
}
var results = new List <object>();
for (int i = 0; i < size; i++)
{
foreach (string key in ParameterEnumerators.Keys)
{
IEnumerator enumerator = ParameterEnumerators[key];
enumerator.MoveNext();
Parameters[key] = enumerator.Current;
}
await ParsedExpression.AcceptAsync(visitor);
results.Add(visitor.Result);
}
return(results);
}
await ParsedExpression.AcceptAsync(visitor);
return(visitor.Result);
}
public object Evaluate()
{
if (HasErrors())
{
throw new EvaluationException(Error);
}
if (ParsedExpression == null)
{
ParsedExpression = Compile(OriginalExpression, (Options & EvaluateOptions.NoCache) == EvaluateOptions.NoCache);
}
var visitor = new EvaluationVisitor(Options);
visitor.EvaluateFunction += EvaluateFunction;
visitor.EvaluateParameter += EvaluateParameter;
visitor.Parameters = Parameters;
// if array evaluation, execute the same expression multiple times
if ((Options & EvaluateOptions.IterateParameters) == EvaluateOptions.IterateParameters)
{
int size = -1;
ParametersBackup = new Dictionary <string, object>();
{
// foreach(var key in Parameters.Keys)
var __enumerator3 = (Parameters.Keys).GetEnumerator();
while (__enumerator3.MoveNext())
{
var key = (string)__enumerator3.Current;
{
ParametersBackup.Add(key, Parameters[key]);
}
}
}
ParameterEnumerators = new Dictionary <string, IEnumerator>();
{
// foreach(var parameter in Parameters.Values)
var __enumerator4 = (Parameters.Values).GetEnumerator();
while (__enumerator4.MoveNext())
{
var parameter = (object)__enumerator4.Current;
{
if (parameter is IEnumerable)
{
int localsize = 0;
{
// foreach(var o in (IEnumerable)parameter)
var __enumerator7 = ((IEnumerable)parameter).GetEnumerator();
while (__enumerator7.MoveNext())
{
var o = (object)__enumerator7.Current;
{
localsize++;
}
}
}
if (size == -1)
{
size = localsize;
}
else if (localsize != size)
{
throw new EvaluationException("When IterateParameters option is used, IEnumerable parameters must have the same number of items");
}
}
}
}
}
{
// foreach(var key in Parameters.Keys)
var __enumerator5 = (Parameters.Keys).GetEnumerator();
while (__enumerator5.MoveNext())
{
var key = (string)__enumerator5.Current;
{
var parameter = Parameters[key] as IEnumerable;
if (parameter != null)
{
ParameterEnumerators.Add(key, parameter.GetEnumerator());
}
}
}
}
var results = new List <object>();
for (int i = 0; i < size; i++)
{
{
// foreach(var key in ParameterEnumerators.Keys)
var __enumerator6 = (ParameterEnumerators.Keys).GetEnumerator();
while (__enumerator6.MoveNext())
{
var key = (string)__enumerator6.Current;
{
IEnumerator enumerator = ParameterEnumerators[key];
enumerator.MoveNext();
Parameters[key] = enumerator.Current;
}
}
}
ParsedExpression.Accept(visitor);
results.Add(visitor.Result);
}
return(results);
}
ParsedExpression.Accept(visitor);
return(visitor.Result);
}
public object Evaluate()
{
if (HasErrors())
{
throw new EvaluationException(Error);
}
if (ParsedExpression == null)
{
ParsedExpression = Compile(OriginalExpression, Options.NoCache());
}
var visitor = new EvaluationVisitor(Options);
visitor.EvaluateFunction += EvaluateFunction;
visitor.EvaluateParameter += EvaluateParameter;
visitor.Parameters = Parameters;
// if array evaluation, execute the same expression multiple times
if (Options.IterateParameters())
{
int size = -1;
ParametersBackup = new Dictionary <string, object>();
foreach (string key in Parameters.Keys)
{
ParametersBackup.Add(key, Parameters[key]);
}
ParameterEnumerators = new Dictionary <string, IEnumerator>();
foreach (object parameter in Parameters.Values)
{
var enumerable = parameter as IEnumerable;
if (enumerable != null)
{
int localsize = enumerable.Cast <object>().Count();
if (size == -1)
{
size = localsize;
}
else if (localsize != size)
{
throw new EvaluationException("When IterateParameters option is used, IEnumerable parameters must have the same number of items");
}
}
}
foreach (string key in Parameters.Keys)
{
var parameter = Parameters[key] as IEnumerable;
if (parameter != null)
{
ParameterEnumerators.Add(key, parameter.GetEnumerator());
}
}
var results = new List <object>();
for (int i = 0; i < size; i++)
{
foreach (string key in ParameterEnumerators.Keys)
{
IEnumerator enumerator = ParameterEnumerators[key];
enumerator.MoveNext();
Parameters[key] = enumerator.Current;
}
ParsedExpression.Accept(visitor);
results.Add(visitor.Result);
}
return(results);
}
ParsedExpression.Accept(visitor);
return(visitor.Result);
}
public object Evaluate()
{
if (HasErrors())
{
throw new EvaluationException(Error);
}
if (ParsedExpression == null)
{
ParsedExpression = Compile(OriginalExpression, (Options & EvaluateOptions.NoCache) == EvaluateOptions.NoCache);
}
var visitor = new EvaluationVisitor(Options);
visitor.EvaluateFunction += EvaluateFunction;
visitor.EvaluateParameter += EvaluateParameter;
visitor.Parameters = Parameters;
// if array evaluation, execute the same expression multiple times
if ((Options & EvaluateOptions.IterateParameters) == EvaluateOptions.IterateParameters)
{
int size = -1;
ParametersBackup = new Dictionary<string, object>();
foreach (string key in Parameters.Keys)
{
ParametersBackup.Add(key, Parameters[key]);
}
ParameterEnumerators = new Dictionary<string, IEnumerator>();
foreach (object parameter in Parameters.Values)
{
if (parameter is IEnumerable)
{
int localsize = 0;
foreach (object o in (IEnumerable)parameter)
{
localsize++;
}
if (size == -1)
{
size = localsize;
}
else if (localsize != size)
{
throw new EvaluationException("When IterateParameters option is used, IEnumerable parameters must have the same number of items");
}
}
}
foreach (string key in Parameters.Keys)
{
var parameter = Parameters[key] as IEnumerable;
if (parameter != null)
{
ParameterEnumerators.Add(key, parameter.GetEnumerator());
}
}
var results = new List<object>();
for (int i = 0; i < size; i++)
{
foreach (string key in ParameterEnumerators.Keys)
{
IEnumerator enumerator = ParameterEnumerators[key];
enumerator.MoveNext();
Parameters[key] = enumerator.Current;
}
ParsedExpression.Accept(visitor);
results.Add(visitor.Result);
}
return results;
}
ParsedExpression.Accept(visitor);
return visitor.Result;
}
public void TestRewritePolynomialWithSinX()
{
IPolynomial p = P("x", 1, 2, 3, 4);
AbstractExpr sinx = new UnaryExpression(V("x"), new Sin()).C;
AbstractExpr expected = sinx * (sinx * (sinx + C(2)) + C(3)) + C(4);
for (double x = -4; x < 5; x++) {
IAbstractExpr result = Fold(p.Accept(new RewritingVisitor(V("x"), sinx), Ig.nore));
var eval = new EvaluationVisitor(V("x"), x);
Assert.AreEqual(expected.Accept(eval), result.Accept(eval), 1e-5);
}
}
public void MathExpression_Can_Evaluate_Variable_Expression()
{
var expression = new VariableExpression("x");
var visitor = new EvaluationVisitor();
var context = new MathExpressionContext();
context.Define("x", 42D);
Assert.AreEqual(42, visitor.Evaluate(expression, context));
}
private double f(double x)
{
EvaluationVisitor evaluationVisitor = new EvaluationVisitor(new Dictionary<Variable, double> { { _variable, x } });
return _expr.Accept(evaluationVisitor, Ig.nore);
}
public void MathExpression_Can_Evaluate_Numeric_Expression()
{
var expression = new NumericExpression(42);
var visitor = new EvaluationVisitor();
Assert.AreEqual(42, visitor.Evaluate(expression, new MathExpressionContext()));
}
public static IDictionary<IVariable, VariableWithValue> Solve(
IEnumerable<AbstractConstraint> solverConstraints,
int loopLimit,
IDictionary<IVariable, VariableWithValue> previousValues,
int frameNo,
EvaluationVisitor debugExpectedResults = null)
{
// Create initial open set
IEnumerable<SolverNode> open = new[] { new SolverNode(solverConstraints, new Dictionary<IVariable, AbstractClosedVariable>(), null) };
DebugDeadNodes.Clear();
// Solver loop
SolverNode solutionOrNull;
do {
if (!open.Any()) {
DebugWriteDeadNodes();
throw new Exception("No solution found for frame " + frameNo + " - no more open nodes. Look into DebugDeadNodes to see nodes that did not mathc a rule.");
}
open = SolverStep(open, previousValues, out solutionOrNull, debugExpectedResults);
//if (debugExpectedResults != null) {
// foreach (var node in open.Except(DebugWrittenNodes)) {
// string debugOutifDead = node.DebugToString(debugExpectedResults);
// Debug.WriteLine(debugOutifDead);
// }
// DebugWrittenNodes.UnionWith(open);
//}
if (--loopLimit < 0) {
DebugWriteDeadNodes();
throw new Exception("Cannot find solution for frame " + frameNo + " - loop limit exhausted");
}
} while (solutionOrNull == null);
solutionOrNull.ResolveBacksubstitutions();
Debug.WriteLine("++++ solution node ++++");
Debug.WriteLine(solutionOrNull);
return solutionOrNull.ClosedVariables
.Where(kvp => kvp.Value is VariableWithValue)
.ToDictionary(kvp => kvp.Key, kvp => (VariableWithValue)kvp.Value);
}
public object Evaluate(LogicalExpression InputLogicExpression = null)
{
if (InputLogicExpression == null) //evaluate with existing logical expression
{
if (HasErrors())
{
throw new EvaluationException(Error);
}
if (ParsedExpression == null)
{
ParsedExpression = Compile(OriginalExpression, (Options & EvaluateOptions.NoCache) == EvaluateOptions.NoCache);
}
}
else //New evaluate
{
this.ParsedExpression = InputLogicExpression;
}
//
if (ParsedExpression == null)
{
return(null);
}
var visitor = new EvaluationVisitor(Options);
visitor.EvaluateFunction += EvaluateFunction;
visitor.EvaluateParameter += EvaluateParameter;
visitor.Parameters = Parameters;
// if array evaluation, execute the same expression multiple times
if ((Options & EvaluateOptions.IterateParameters) == EvaluateOptions.IterateParameters)
{
int size = -1;
ParametersBackup = new Dictionary <string, object>();
foreach (string key in Parameters.Keys)
{
ParametersBackup.Add(key, Parameters[key]);
}
ParameterEnumerators = new Dictionary <string, IEnumerator>();
foreach (object parameter in Parameters.Values)
{
if (parameter is IEnumerable)
{
int localsize = 0;
foreach (object o in (IEnumerable)parameter)
{
localsize++;
}
if (size == -1)
{
size = localsize;
}
else if (localsize != size)
{
throw new EvaluationException("When IterateParameters option is used, IEnumerable parameters must have the same number of items");
}
}
}
foreach (string key in Parameters.Keys)
{
var parameter = Parameters[key] as IEnumerable;
if (parameter != null)
{
ParameterEnumerators.Add(key, parameter.GetEnumerator());
}
}
var results = new List <object>();
for (int i = 0; i < size; i++)
{
foreach (string key in ParameterEnumerators.Keys)
{
IEnumerator enumerator = ParameterEnumerators[key];
enumerator.MoveNext();
Parameters[key] = enumerator.Current;
}
ParsedExpression.Accept(visitor);
results.Add(visitor.Result);
}
return(results);
}
ParsedExpression.Accept(visitor);
//Record data
ParsedExpression.objResult = visitor.Result;
//Resturn data
return(visitor.Result);
}
public void TestSquare3()
{
AbstractExpr p = new UnaryExpression(C(1).C + V("a") + V("b"), new Square());
// (a+b+1)²
// = a²+ab+a + ab+b²+b + a+b+1
// = a²+2a+1 + b²+2b + ab+ab
IPolynomial pa = Polynomial.CreatePolynomial(V("a"), 1, 2, 1);
IPolynomial pb = Polynomial.CreatePolynomial(V("b"), 1, 2, 0);
AbstractExpr e = V("a").C * V("b") + V("a").C * V("b");
var expected = pa.C + (pb.C + e);
IAbstractExpr fold = Fold(p);
// We check by comparing values at a few places, as we do not know the exact
// order of the pairs in e.
for (double a = -3.5; a < 4; a++) {
for (double b = -3.5; b < 4; b++) {
var visitor = new EvaluationVisitor(new Dictionary<IVariable, double> { { V("a"), a }, { V("b"), b } });
double f = fold.Accept(visitor);
double exp = expected.Accept(visitor);
Assert.AreEqual(exp, f, 1e-5);
}
}
}
