/// <summary>
/// This property signs if an expression is ready to be evaluated,
/// namely, all subexpression values are known
/// </summary>
/// <param name="evalContext">Evaluation context</param>
/// <returns>True, if the expression is ready; otherwise, false</returns>
public override bool ReadyToEvaluate(IEvaluationContext evalContext)
{
var result = evalContext.GetSymbolValue(SymbolName, ScopeSymbolNames, StartFromGlobal).ExprValue != null;
if (!result)
{
AddError(FullSymbolName);
}
return(result);
}
/// <summary>
/// Retrieves the value of the expression
/// </summary>
/// <param name="evalContext">Evaluation context</param>
/// <returns>Evaluated expression value</returns>
public override ExpressionValue Evaluate(IEvaluationContext evalContext)
{
var(exprValue, usageInfo) = evalContext.GetSymbolValue(SymbolName, ScopeSymbolNames, StartFromGlobal);
if (exprValue != null)
{
if (usageInfo != null)
{
usageInfo.IsUsed = true;
}
return(exprValue);
}
AddError(FullSymbolName);
return(ExpressionValue.NonEvaluated);
}
/// <summary>
/// Retrieves the value of the expression
/// </summary>
/// <param name="evalContext">Evaluation context</param>
/// <returns>Evaluated expression value</returns>
public override ExpressionValue Evaluate(IEvaluationContext evalContext)
{
var idExpr = evalContext.GetSymbolValue(MacroParamId).ExprValue;
return(idExpr ?? ExpressionValue.NonEvaluated);
}
/// <summary> /// This property signs if an expression is ready to be evaluated, /// namely, all subexpression values are known /// </summary> /// <param name="evalContext">Evaluation context</param> /// <returns>True, if the expression is ready; otherwise, false</returns> public override bool ReadyToEvaluate(IEvaluationContext evalContext) => evalContext.GetSymbolValue(MacroParamId).ExprValue != null;
/// <summary>
/// Retrieves the value of the expression
/// </summary>
/// <param name="evalContext">Evaluation context</param>
/// <returns>Evaluated expression value</returns>
public override ushort Evaluate(IEvaluationContext evalContext)
{
return(evalContext.GetSymbolValue(SymbolName) ?? 0);
}
/// <summary> /// This property signs if an expression is ready to be evaluated, /// namely, all subexpression values are known /// </summary> /// <param name="evalContext">Evaluation context</param> /// <returns>True, if the expression is ready; otherwise, false</returns> public override bool ReadyToEvaluate(IEvaluationContext evalContext) => evalContext.GetSymbolValue(SymbolName) != null;