On 01/25/2018 11:49 AM, JN wrote:
foreach (i, member; FieldNameTuple!T)
{
if (!hasUDA!(member, "noserialize"))
{
writeln(member);
}
'member' is a string local variable, which does not have that UDA. You
need to get the symbol of the struct:
if (!hasUDA!(__traits(getMember, T, member), "noserialize"))
{
writeln(member);
}
However, note that you're using a compile-time foreach, which expands
its body for each iteration. Since you used a regular if, you have three
checks at runtime.
What you really want is use a 'static if':
static if (!hasUDA!(__traits(getMember, T, member),
"noserialize"))
{
writeln(member);
}
Aaah... Much lighter... :)
Even further, you may want to consider using a 'static foreach':
static foreach (i, member; FieldNameTuple!T)
{
// ...
}
That is more powerful because it can iterate over more ranges. However
there are some differences from the regular foreach: For example,
'static foreach' does not introduce a scope per iteration.
Ali
