/// <summary>
/// This function is intended only for ExpressionNode authors to call. The EvaluationContext
/// caches result-state specific to the evaluation instance.
/// </summary>
public EvaluationResult Evaluate(EvaluationContext context)
{
// Evaluate
Level = Container == null ? 0 : Container.Level + 1;
TraceVerbose(context, Level, $"Evaluating {Name}:");
var coreResult = EvaluateCore(context, out ResultMemory coreMemory);
if (coreMemory == null)
{
coreMemory = new ResultMemory();
}
// Convert to canonical value
var val = ExpressionUtility.ConvertToCanonicalValue(coreResult, out ValueKind kind, out Object raw);
// The depth can be safely trimmed when the total size of the core result is known,
// or when the total size of the core result can easily be determined.
var trimDepth = coreMemory.IsTotal || (Object.ReferenceEquals(raw, null) && ExpressionUtility.IsPrimitive(kind));
// Account for the memory overhead of the core result
var coreBytes = coreMemory.Bytes ?? EvaluationMemory.CalculateBytes(raw ?? val);
context.Memory.AddAmount(Level, coreBytes, trimDepth);
// Account for the memory overhead of the conversion result
if (!Object.ReferenceEquals(raw, null))
{
var conversionBytes = EvaluationMemory.CalculateBytes(val);
context.Memory.AddAmount(Level, conversionBytes);
}
var result = new EvaluationResult(context, Level, val, kind, raw);
// Store the trace result
if (this.TraceFullyRealized)
{
context.SetTraceResult(this, result);
}
return(result);
}
public Literal(Object val)
{
Value = ExpressionUtility.ConvertToCanonicalValue(val, out var kind, out _);
Kind = kind;
Name = kind.ToString();
}
