private CliExecutorArgumentDescriptor ExtractArgumentDescriptor(PseudoList subForm)
{
var alias = subForm.GetSingleKeywordArgument <Symbol>(":alias").Name.ToLowerInvariant();
var description = subForm.GetSingleKeywordArgument <StringAtom>(":description", true)?.Value;
var docSubstitution = subForm.GetSingleKeywordArgument <StringAtom>(":doc-subst", true)?.Value;
IList <string> values = null;
if (subForm.GetCarSymbolName().ToLowerInvariant() == "multi-text")
{
values = subForm
.GetAllKeywordArguments(":values")
.Cast <StringAtom>()
.Select(x => x.Value)
.ToList();
}
var isMandatory = subForm.GetSingleArgumentAsBool(":is-mandatory") ?? false;
var allowsMultiple = subForm.GetSingleArgumentAsBool(":allows-multiple") ?? false;
var argumentDescriptor = new CliExecutorArgumentDescriptor(
alias,
values,
isMandatory,
allowsMultiple,
description,
docSubstitution);
return(argumentDescriptor);
}