public IExpr evaluate(final IAST ast) {
Validate.checkSize(ast, 3);
if (ast.get(1).isSymbol()) {
if (ast.get(2).isAST("Blank")) {
IAST blank = (IAST) ast.get(2);
if (blank.size() == 1) {
return F.$p((ISymbol) ast.get(1));
}
if (blank.size() == 2) {
return F.$p((ISymbol) ast.get(1), blank.get(1));
}
}
if (ast.get(2).isPattern()) {
IPattern blank = (IPattern) ast.get(2);
if (blank.isBlank()) {
return F.$p((ISymbol) ast.get(1), blank.getCondition());
}
}
}
return null;
}
public void testHashValueVisitor() {
HashValueVisitor v = new HashValueVisitor(1);
IExpr expr = F.Power(F.Sin(F.Log(F.C1)), F.C2);
int hash = expr.accept(v);
assertEquals(hash, -1895901688);
v.setUp();
expr = F.Power(F.Sin(F.Cos(F.C3)), F.C2);
hash = expr.accept(v);
assertEquals(hash, -1895901688);
v.setUp();
expr = F.Power(F.Sin(F.$p("x")), F.C2);
hash = expr.accept(v);
assertEquals(hash, -1895901688);
v.setUp();
expr = F.Power(F.Cos(F.Sin(F.C3)), F.C2);
hash = expr.accept(v);
assertEquals(hash, -1896372423);
}