// Just recalc Name.
private void RecalcWorker2(string name)
{
if (_calcs.ContainsKey(name))
{
return; // already computed.
}
var fi = _parent.Formulas[name];
// Now calculate this node. Will recalc any dependencies if needed.
if (fi._binding != null)
{
var binding = fi._binding;
(IntermediateNode irnode, ScopeSymbol ruleScopeSymbol) = IRTranslator.Translate(binding);
var scope = this;
var v = new EvalVisitor(_cultureInfo);
FormulaValue newValue = irnode.Accept(v, SymbolContext.New());
var equal = fi._value != null && // null on initial run.
RuntimeHelpers.AreEqual(newValue, fi._value);
if (!equal)
{
_sendUpdates.Add(name);
}
fi._value = newValue;
}
_calcs[name] = fi._value;
}
/// <summary>
/// Evaluate an expression as text and return the result.
/// </summary>
/// <param name="expressionText">textual representation of the formula</param>
/// <param name="parameters">parameters for formula. The fields in the parameter record can
/// be acecssed as top-level identifiers in the formula.</param>
/// <returns>The formula's result</returns>
public FormulaValue Eval(string expressionText, RecordValue parameters = null)
{
if (parameters == null)
{
parameters = RecordValue.Empty();
}
var check = Check(expressionText, parameters.IRContext.ResultType);
check.ThrowOnErrors();
var binding = check._binding;
(IntermediateNode irnode, ScopeSymbol ruleScopeSymbol) = IRTranslator.Translate(binding);
var ev2 = new EvalVisitor(_cultureInfo);
FormulaValue newValue = irnode.Accept(ev2, SymbolContext.New().WithGlobals(parameters));
return(newValue);
}