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Make the scan command in ScanPairs a template parameter.

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This commit is contained in:
King_DuckZ 2016-06-13 16:20:31 +01:00
parent 9949c273a1
commit 78eee0e16f
4 changed files with 12 additions and 5 deletions
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10
src/backends/redis/scan_iterator.hpp
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@ -20,6 +20,7 @@
#include "reply.hpp"
#include "helpers/has_method.hpp"
#include "enum.h"
#include <boost/iterator/iterator_facade.hpp>
#include <type_traits>
#include <vector>
@ -52,6 +53,10 @@ namespace redis {
};
} //namespace implem
BETTER_ENUM(ScanCommands, char,
SCAN, SSCAN, ZSCAN, HSCAN
);
template <typename ValueFetch>
class ScanIterator : private implem::ScanIteratorBaseClass, public implem::ScanIteratorBaseIterator<ValueFetch>, private ValueFetch {
friend class boost::iterator_core_access;
@ -111,13 +116,14 @@ namespace redis {
boost::string_ref m_scan_target;
};
template <typename P, typename A=decltype(P().first), typename B=decltype(P().second)>
template <typename P, char Command, typename A=decltype(P().first), typename B=decltype(P().second)>
struct ScanPairs {
static_assert(Command == ScanCommands::HSCAN or Command == ScanCommands::ZSCAN, "Invalid scan command chosen");
typedef P value_type;
explicit ScanPairs ( boost::string_ref parScanTarget ) : m_scan_target(parScanTarget) {}
static constexpr const char* command ( void ) { return "HSCAN"; }
static constexpr const char* command ( void ) { return ScanCommands::_from_integral(Command)._to_string(); }
static constexpr const std::size_t step = 2;
static value_type make_value ( const RedisReplyType* parItem );