public static Func <ResultT> Prepare <ResultT>(Expression body, ReadOnlyCollection <ParameterExpression> parameters = null)
{
if (body == null)
{
throw new ArgumentNullException("body");
}
var collector = new ConstantsCollector();
collector.Visit(body);
var constExpressions = collector.Constants.ToArray();
var parameterExpressions = Constants.EmptyParameters;
var compiledBody = Compile(body, constExpressions, parameterExpressions);
var constants = Array.ConvertAll(constExpressions, c => c.Value);
return(() =>
{
var locals = new object[] { null, null, null };
var closure = new Closure(constants, locals);
var result = (ResultT)compiledBody.Run(closure);
Array.Clear(locals, 0, locals.Length);
return result;
});
}
public static Func <Arg1T, Arg2T, Arg3T, ResultT> PrepareFunc <Arg1T, Arg2T, Arg3T, ResultT>(Expression body, ReadOnlyCollection <ParameterExpression> parameters)
{
if (body == null)
{
throw new ArgumentNullException("body");
}
if (parameters == null)
{
throw new ArgumentNullException("parameters");
}
var collector = new ConstantsCollector();
collector.Visit(body);
var constExpressions = collector.Constants.ToArray();
var parameterExpressions = parameters.ToArray();
var compiledBody = Compile(body, constExpressions, parameterExpressions);
var constants = ArrayUtils.ConvertAll(constExpressions, c => c.Value);
return((arg1, arg2, arg3) =>
{
var locals = new object[] { null, null, null, arg1, arg2, arg3 };
var closure = new Closure(constants, locals);
var result = closure.Unbox <ResultT>(compiledBody.Run(closure));
Array.Clear(locals, 0, locals.Length);
return result;
});
}