public override Expression Bind(object[] args, ReadOnlyCollection <ParameterExpression> parameters, LabelTarget returnLabel)
{
if (args.Length == 1)
{
Debug.Assert(this == Instance0, "Use Instance0 when passing 0 args");
var criteria = new FormatSelectionCriteria();
if (args[0] is PSObject psobj)
{
criteria.Type = psobj.BaseObject.GetType();
}
else
{
criteria.Type = args[0].GetType();
}
var directive = FormatSelector.FindDirective(criteria) ?? FormatGenerator.Generate(criteria.Type);
return(directive.Bind(parameters[0], args[0].GetType(), Expression.Constant(directive), returnLabel));
}
if (args.Length == 2)
{
Debug.Assert(this == Instance1, "Use Instance0 when passing 0 args");
switch (args[1])
{
case ListFormat listFormat:
return(listFormat.Bind(parameters[0], args[0].GetType(), parameters[1], returnLabel));
}
}
throw new Exception();
}
public static FormatDirective FindDirective(FormatSelectionCriteria criteria)
{
var type = criteria.Type;
lock (FormatDefinitions)
{
while (type != null)
{
if (!FormatDefinitions.TryGetValue(type, out var directives))
{
if (type.IsGenericType)
{
// Try again with the unspecialized type
var generic = type.GetGenericTypeDefinition();
FormatDefinitions.TryGetValue(generic, out directives);
}
}
if (directives != null)
{
foreach (var directive in directives)
{
switch (criteria.Style)
{
case FormatStyle.List:
if (!(directive is ListFormat))
{
continue;
}
break;
case FormatStyle.Table:
//if (!(directive is TableFormat)) continue;
break;
}
if (!string.IsNullOrEmpty(criteria.Name) &&
!criteria.Name.Equals(directive.Name, StringComparison.OrdinalIgnoreCase))
{
continue;
}
return(directive);
}
}
type = type.BaseType;
}
}
return(null);
}