private Expression Project(Expression input, Expression output)
{
var job = new MapJob(_inputArg, _outputArg);
var fn = _provider.CreateProjectionFunction(job);
var type = input.Type.IsQueryable() ? typeof(Queryable) : typeof(Enumerable);
var expr = Expression.Call(type, "Select", new[] { fn.Parameters[0].Type, fn.ReturnType }, input, fn);
if (expr.Type == output.Type)
{
return(expr);
}
if (output.Type.IsArray)
{
return(Expression.Call(type, "ToArray", new[] { _outputArg }, expr));
}
return(Expression.Call(type, "ToList", new[] { _outputArg }, expr));
}
private Expression Project(Expression input, Expression output)
{
var fn = _provider.CreateProjectionFunction(new MapJob(input.Type, output.Type));
return fn.ReplaceParameters(input);
}
