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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "value.h"
#include <vespa/vespalib/util/typify.h>
#include <vespa/vespalib/objects/nbostream.h>
namespace vespalib::eval {
namespace {
struct EmptyView : Value::Index::View {
void lookup(ConstArrayRef<const string_id*> ) override {}
bool next_result(ConstArrayRef<string_id*> , size_t &) override { return false; }
};
struct TrivialView : Value::Index::View {
bool first = false;
void lookup(ConstArrayRef<const string_id*> ) override { first = true; }
bool next_result(ConstArrayRef<string_id*> , size_t &idx_out) override {
if (first) {
idx_out = 0;
first = false;
return true;
} else {
return false;
}
}
};
struct MySum {
template <typename CT> static double invoke(TypedCells cells) {
double res = 0.0;
for (CT cell: cells.typify<CT>()) {
res += cell;
}
return res;
}
};
} // <unnamed>
EmptyIndex::EmptyIndex() = default;
EmptyIndex EmptyIndex::_index;
size_t
EmptyIndex::size() const
{
return 0;
}
std::unique_ptr<Value::Index::View>
EmptyIndex::create_view(ConstArrayRef<size_t>) const
{
return std::make_unique<EmptyView>();
}
TrivialIndex::TrivialIndex() = default;
TrivialIndex TrivialIndex::_index;
size_t
TrivialIndex::size() const
{
return 1;
}
std::unique_ptr<Value::Index::View>
TrivialIndex::create_view(ConstArrayRef<size_t>) const
{
return std::make_unique<TrivialView>();
}
double
Value::as_double() const
{
return typify_invoke<1,TypifyCellType,MySum>(type().cell_type(), cells());
}
ValueType DoubleValue::_type = ValueType::double_type();
}
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