public static LambdaExpression CreateSetter(LambdaExpression getter)
{
if (getter == null)
{
throw new ArgumentNullException("getter");
}
var valueParameter = Expression.Parameter(getter.ReturnType);
var visitor = new SetExpressionRewriter(valueParameter);
var body = visitor.Visit(getter.Body);
if (body == null)
{
return(null);
}
var parameters = new ParameterExpression[getter.Parameters.Count + 1];
getter.Parameters.CopyTo(parameters, 0);
parameters[parameters.Length - 1] = valueParameter;
var typeParameters = new Type[getter.Parameters.Count + 1];
for (int i = 0; i < getter.Parameters.Count; i++)
{
typeParameters[i] = getter.Parameters[i].Type;
}
typeParameters[typeParameters.Length - 1] = getter.ReturnType;
var delegateType = actionTypes[getter.Parameters.Count].MakeGenericType(typeParameters);
return(Expression.Lambda(delegateType, body, parameters));
}
public static Expression <Action <T, TValue> > CreateSetter <T, TValue>(Expression <Func <T, TValue> > getter)
{
if (getter == null)
{
throw new ArgumentNullException("getter");
}
var p = Expression.Parameter(typeof(TValue));
var visitor = new SetExpressionRewriter(p);
var body = visitor.Visit(getter.Body);
if (body == null)
{
return(null);
}
return(Expression.Lambda <Action <T, TValue> >(body, getter.Parameters[0], p));
}