protected bool CompileExpression(string expr)
{
try
{
CompiledExpression <TValue> ce = new CompiledExpression <TValue>(expr);
var del = ce.ScopeCompile <TScope>();
//var ex = ce.Expression as Expression<Func<TScope, TValue>>;
var ex = ce.Expression;
var set = ExpressionUtilities.FindMembers(ex, scope);
var val = del(scope);
var oldVal = cachedValue;
// If we get to this point, everything worked so we can assign the vars
valueDelegate = del;
valueExpression = ce;
cachedValue = val;
pending = false;
SetWatchedSubscriptions(set);
if (!oldVal.Equals(cachedValue))
{
RaisePropertyChanged(nameof(Value));
}
return(true);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e);
return(false);
}
}
public void TestIntTagDiscovery()
{
string exText = "TagI1 + TagI2.FinalValue";
var scope = new TestScope();
var ce = new CompiledExpression <double>(exText);
var del = ce.ScopeCompile <TestScope>();
var r = del(scope);
var result = ExpressionUtilities.FindMembers(ce.Expression, scope);
var key1 = scope.TagI1 as INotifyPropertyChanged;
var key2 = scope.TagI2 as INotifyPropertyChanged;
var result1 = result[key1];
var result2 = result[key2];
Assert.True(result.ContainsKey(key1), "tag1 not found");
Assert.True(result.ContainsKey(key2), "tag2 not found");
Assert.True(result[key1].Contains("Value"));
Assert.True(result[key2].Contains("FinalValue"));
}
