public static IEnumerable <IOption> Execute <T>(this OperationWorkflow workflow, T host, OperationArgParser parser = null)
{
var requested = Describe <T>(workflow);
foreach (var i in requested.Where(i => i.IsNone()))
{
yield return(i);
}
var available = requested.Where(i => i.Exists).Select(i => i.Require()).ToList();
foreach (var invocation in available)
{
yield return(Execute(invocation, host, parser));
}
}
public static IEnumerable <Option <ClrMethodCallDescription> > Describe <T>(this OperationWorkflow workflow)
{
var contract = DescribeContract <T>();
var activeOps = workflow.Steps.Where(i => i.IsActive).ToList();
var descriptions = from active in some(activeOps)
let xyz = activeOps.Select(
execSpec =>
from op in execSpec.DescribeOperation <T>()
from inv in contract.DescribeInvocation(execSpec)
select inv
)
select xyz;
return(descriptions.ValueOrDefault(stream <Option <ClrMethodCallDescription> >()));
}