public override async Task <object> Evaluate(EvaluationContext ctx)
{
if (ctx.TryGetFunction(FunctionName, out TemplateFunction functionEntry))
{
var argValues = new object[Arguments.Length];
for (int i = 0; i < Arguments.Length; i++)
{
argValues[i] = await Arguments[i].Evaluate(ctx);
}
return(await functionEntry.Evaluate(argValues, ctx));
}
else
{
throw new TemplateException($"Unknown function: {FunctionName}");
}
}
public override async IAsyncEnumerable <Path> ComputeSelect(EvaluationContext ctx)
{
// (1) The selects from the arguments
foreach (var arg in Arguments)
{
await foreach (var select in arg.ComputeSelect(ctx))
{
yield return(select);
}
}
// (2) Any additional selects specific to the function implementation
if (ctx.TryGetFunction(FunctionName, out TemplateFunction functionEntry))
{
await foreach (var select in functionEntry.ComputeAdditionalSelect(Arguments, ctx))
{
yield return(select);
}
}
}