internal override Expression MakeCompareExpression(Expression lhs, Expression rhs)
{
var tProperty = typeof(TProperty);
var lhsProperty = GetProperty.MakeInvocation(lhs);
var rhsProperty = GetProperty.MakeInvocation(rhs);
if (Comparer == null)
{
var compareTo = tProperty.GetMethod(
"CompareTo", new [] { tProperty }
);
if (compareTo != null)
{
return(Expression.Call(
lhsProperty, compareTo, rhsProperty
));
}
}
var compare = RuntimeComparer.GetType().GetMethod("Compare", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
return(Expression.Call(
Expression.Constant(RuntimeComparer),
compare, lhsProperty, rhsProperty
));
}
internal override Expression MakeCompareExpression(Expression lhs, Expression rhs)
{
var lhsTags = GetTags.MakeInvocation(lhs);
var rhsTags = GetTags.MakeInvocation(rhs);
var getSortKeys = Expression.Field(
Expression.Constant(this), GetType().GetField("SortKeys", BindingFlags.Instance | BindingFlags.NonPublic)
);
var sortKeys = Expression.Variable(typeof(int[]), "sortKeys");
var fId = typeof(Tags).GetField("Id", BindingFlags.Instance | BindingFlags.Public);
var lhsId = Expression.Field(lhsTags, fId);
var rhsId = Expression.Field(rhsTags, fId);
var lhsSortKey = Expression.ArrayIndex(sortKeys, lhsId);
var rhsSortKey = Expression.ArrayIndex(sortKeys, rhsId);
return(Expression.Block(
typeof(int),
new[] { sortKeys },
Expression.Assign(sortKeys, getSortKeys),
Expression.Subtract(lhsSortKey, rhsSortKey)
));
}
