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public AddCustomFunction ( string name, double>.System |
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| name | string | |
| func | double>.System | |
| enableSymbolicationTimeEvaluation | bool | |
| Résultat | void | |
public static void TestStringFuncs()
{
ExpressionSolver solver = new ExpressionSolver();
solver.AddCustomFunction("strlen",1, delegate(object[] p) {
return ((string)p[0]).Length;
},true);
var exp = solver.SymbolicateExpression("strlen('123')");
AssertSameValue(exp.Evaluate(),3.0);
exp = solver.SymbolicateExpression("strlen('12\\'3')");
AssertSameValue(exp.Evaluate(),4.0);
exp = solver.SymbolicateExpression("strlen('12\\'3 4')");
AssertSameValue(exp.Evaluate(),6.0);
solver.AddCustomFunction("strlen2",2, delegate(object[] p) {
return ((string)p[0]).Length*(double)p[1];
});
exp = solver.SymbolicateExpression("strlen2('12\\'3 4',2.5)");
AssertSameValue(exp.Evaluate(),6.0*2.5);
string[] erroneousStrings = new string[]{"strlen(''')","strlen('''')","''"};
foreach (var errorString in erroneousStrings)
{
try
{
exp = solver.SymbolicateExpression(errorString);
throw new System.Exception("ExpressionSolverTest failed");
}
catch (ESSyntaxErrorException)
{
// Parameters were not given correctly - syntax error expected
}
catch (System.Exception)
{
throw new System.Exception("ExpressionSolverTest failed");
}
}
// Because strlen should be evaluated at symbolication time, the following should reduce to one real value symbol:
exp = solver.SymbolicateExpression("(1+strlen('123')+1)/strlen('12345')");
Assert(exp.root.type == SymbolType.RealValue);
AssertSameValue(exp.root.value,1);
// But if one of the parameters is not constant, then we cant do it:
exp = solver.SymbolicateExpression("strlen('123')+x", new string[]{"x"});
Assert(exp.root.type == SymbolType.SubExpression);
// Test string variables. Both exp-local and global
exp = solver.SymbolicateExpression("strlen(stringVariableTest)","$stringVariableTest");
exp.SetVariable("stringVariableTest","test");
AssertSameValue(exp.Evaluate(),4);
try
{
exp.SetVariable("stringVariableTest",121);
Assert(false);
}
catch (ESParameterTypeChangedException)
{
}
solver.SetGlobalVariable("striva","123");
exp = solver.SymbolicateExpression("strlen( ( striva ) )/3");
AssertSameValue(exp.Evaluate(),1);
try
{
solver.SetGlobalVariable("striva",42141.0);
Assert(false);
}
catch (ESParameterTypeChangedException)
{
}
}
public static void TestFuncs()
{
ExpressionSolver solver = new ExpressionSolver();
solver.SetGlobalVariable("zero", 0);
var exp1 = solver.SymbolicateExpression("sin(pi/2)-cos(zero)");
AssertSameValue(exp1.Evaluate(), 0);
var exp2 = solver.SymbolicateExpression("2*e^zero - exp(zero)");
AssertSameValue(exp2.Evaluate(), 1);
var exp3 = solver.SymbolicateExpression("log(e^6)");
AssertSameValue(exp3.Evaluate(), 6);
var exp4 = solver.SymbolicateExpression("sqrt(2)-2^0.5");
AssertSameValue(exp4.Evaluate(), 0);
var exp5 = solver.SymbolicateExpression("exp(log(6))");
AssertSameValue(exp5.Evaluate(), 6);
var rnd = new System.Random();
solver.AddCustomFunction("Rnd1", 2, delegate(double[] p) {
return(p[0] + (p[1] - p[0]) * (rnd.NextDouble()));
}, false);
var exp6 = solver.SymbolicateExpression("Rnd1(0,1)");
var firstRnd = exp6.Evaluate();
int iter = 0;
while (true)
{
var secondRnd = exp6.Evaluate();
if (firstRnd != secondRnd)
{
break;
}
iter++;
if (iter == 10000)
{
// Probability of this happening is miniscule if everything works as it should
throw new System.Exception("ExpressionSolverTest failed");
}
}
solver.AddCustomFunction("Rnd2", 2, delegate(double[] p) {
return(p[0] + (p[1] - p[0]) * (rnd.NextDouble()));
}, true);
var exp7 = solver.SymbolicateExpression("Rnd2(0,1)");
AssertSameValue(exp7.Evaluate(), exp7.Evaluate());
var exp8 = solver.SymbolicateExpression("cos(0)+1*2");
AssertSameValue(exp8.Evaluate(), 3);
solver.AddCustomFunction("dist", 5, delegate(double[] p) {
return(System.Math.Pow((p[2] - p[0]) * (p[2] - p[0]) + (p[3] - p[1]) * (p[3] - p[1]), p[4]));
}, true);
var exp9 = solver.SymbolicateExpression("dist(3*x,(4*x),+6*x,-1*x,sin(x))", "x");
double x = 21;
exp9.SetVariable("x", x);
AssertSameValue(exp9.Evaluate(), System.Math.Pow((3 * x - 6 * x) * (3 * x - 6 * x) + (4 * x + x) * (4 * x + x), System.Math.Sin(x)));
}
public static void TestFuncs()
{
ExpressionSolver solver = new ExpressionSolver();
solver.SetGlobalVariable("zero",0);
var exp1 = solver.SymbolicateExpression("sin(pi/2)-cos(zero)");
AssertSameValue(exp1.Evaluate(),0);
var exp2 = solver.SymbolicateExpression("2*e^zero - exp(zero)");
AssertSameValue(exp2.Evaluate(),1);
var exp3 = solver.SymbolicateExpression("log(e^6)");
AssertSameValue(exp3.Evaluate(),6);
var exp4 = solver.SymbolicateExpression("sqrt(2)-2^0.5");
AssertSameValue(exp4.Evaluate(),0);
var exp5 = solver.SymbolicateExpression("exp(log(6))");
AssertSameValue(exp5.Evaluate(),6);
var rnd = new System.Random();
solver.AddCustomFunction("Rnd1",2, delegate(double[] p) {
return p[0] + (p[1]-p[0])*(rnd.NextDouble());
},false);
var exp6 = solver.SymbolicateExpression("Rnd1(0,1)");
var firstRnd = exp6.Evaluate();
int iter = 0;
while (true)
{
var secondRnd = exp6.Evaluate();
if (firstRnd != secondRnd)
{
break;
}
iter++;
if (iter==10000)
{
// Probability of this happening is miniscule if everything works as it should
throw new System.Exception("ExpressionSolverTest failed");
}
}
solver.AddCustomFunction("Rnd2",2, delegate(double[] p) {
return p[0] + (p[1]-p[0])*(rnd.NextDouble());
},true);
var exp7 = solver.SymbolicateExpression("Rnd2(0,1)");
AssertSameValue(exp7.Evaluate(),exp7.Evaluate());
var exp8 = solver.SymbolicateExpression("cos(0)+1*2");
AssertSameValue(exp8.Evaluate(),3);
solver.AddCustomFunction("dist",5, delegate(double[] p) {
return System.Math.Pow( (p[2]-p[0])*(p[2]-p[0]) + (p[3]-p[1])*(p[3]-p[1]) ,p[4]);
},true);
var exp9 = solver.SymbolicateExpression("dist(3*x,(4*x),+6*x,-1*x,sin(x))","x");
double x = 21;
exp9.SetVariable("x",x);
AssertSameValue(exp9.Evaluate(),System.Math.Pow( (3*x-6*x)*(3*x-6*x)+(4*x+x)*(4*x+x),System.Math.Sin(x) ));
}
public static void TestStringFuncs()
{
ExpressionSolver solver = new ExpressionSolver();
solver.AddCustomFunction("strlen", 1, delegate(object[] p) {
return(((string)p[0]).Length);
}, true);
var exp = solver.SymbolicateExpression("strlen('123')");
AssertSameValue(exp.Evaluate(), 3.0);
exp = solver.SymbolicateExpression("strlen('12\\'3')");
AssertSameValue(exp.Evaluate(), 4.0);
exp = solver.SymbolicateExpression("strlen('12\\'3 4')");
AssertSameValue(exp.Evaluate(), 6.0);
solver.AddCustomFunction("strlen2", 2, delegate(object[] p) {
return(((string)p[0]).Length * (double)p[1]);
});
exp = solver.SymbolicateExpression("strlen2('12\\'3 4',2.5)");
AssertSameValue(exp.Evaluate(), 6.0 * 2.5);
string[] erroneousStrings = new string[] { "strlen(''')", "strlen('''')", "''" };
foreach (var errorString in erroneousStrings)
{
try
{
exp = solver.SymbolicateExpression(errorString);
throw new System.Exception("ExpressionSolverTest failed");
}
catch (ESSyntaxErrorException)
{
// Parameters were not given correctly - syntax error expected
}
catch (System.Exception)
{
throw new System.Exception("ExpressionSolverTest failed");
}
}
// Because strlen should be evaluated at symbolication time, the following should reduce to one real value symbol:
exp = solver.SymbolicateExpression("(1+strlen('123')+1)/strlen('12345')");
Assert(exp.root.type == SymbolType.RealValue);
AssertSameValue(exp.root.value, 1);
// But if one of the parameters is not constant, then we cant do it:
exp = solver.SymbolicateExpression("strlen('123')+x", new string[] { "x" });
Assert(exp.root.type == SymbolType.SubExpression);
// Test string variables. Both exp-local and global
exp = solver.SymbolicateExpression("strlen(stringVariableTest)", "$stringVariableTest");
exp.SetVariable("stringVariableTest", "test");
AssertSameValue(exp.Evaluate(), 4);
try
{
exp.SetVariable("stringVariableTest", 121);
Assert(false);
}
catch (ESParameterTypeChangedException)
{
}
solver.SetGlobalVariable("striva", "123");
exp = solver.SymbolicateExpression("strlen( ( striva ) )/3");
AssertSameValue(exp.Evaluate(), 1);
try
{
solver.SetGlobalVariable("striva", 42141.0);
Assert(false);
}
catch (ESParameterTypeChangedException)
{
}
}