On Tuesday, 27 February 2018 at 16:55:27 UTC, Marc wrote:
[...]
So deep down the error is in that method which I call from
deserializeLine() function:
void setValue(T, V)(auto ref T aggregate, string field, V
value) {
writeln("setting {", field, "} to {", value, "}");
import std.traits : FieldNameTuple;
import std.meta : Alias;
switch (field) {
foreach (fieldName; FieldNameTuple!T) {
case fieldName:
static if (is(typeof(__traits(getMember,
aggregate, fieldName) = value))) {
__traits(getMember, aggregate, fieldName)
= value;
return;
} else {
assert(false, T.stringof ~ "."~field~" cannot
be assigned from a "~V.stringof~".");
}
}
default:
assert(false, T.stringof ~ " has no field named
"~field~".");
}
}
the function is used like this:
Field field = new Field();
foreach(CSVLinkedIndex linkedIndex; linkedIndexes) {
string value =
values[linkedIndex.csv_column_index];
setValue(field, linkedIndex.field_member,
value);
}
which eventually (in about 8 calls) return the error:
core.exception.OutOfMemoryError@src\core\exception.d(702):
Memory allocation failed
it uses about 4MB in a 8GB machine then crashs. It's return by
the top function using yield:
yield(field);
But I can't find out why gc fails to allocate at some point. In
fact, I've forced the gc to do so in my top loop:
foreach(Field field; deserializeFile()) {
scope(exit) {
import core.memory : GC;
GC.collect();
}
}
Which didn't solve the issue.
