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Null handle proposal #23

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Null handle proposal #23

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5 changes: 5 additions & 0 deletions src/handle.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
#include "handlegraph/util.hpp"

#include <vector>
#include <limits>

/** \file handle.cpp
* Implement handle graph utility methods, oprtators, and default implementations.
Expand Down Expand Up @@ -123,6 +124,10 @@ bool operator!=(const occurrence_handle_t& a, const occurrence_handle_t& b) {
return !(a == b);
}

/// Define the null handle.
const handle_t null_handle = as_handle(std::numeric_limits<uint64_t>::max());


}


3 changes: 3 additions & 0 deletions src/include/handlegraph/types.hpp
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Expand Up @@ -47,6 +47,9 @@ bool operator==(const occurrence_handle_t& a, const occurrence_handle_t& b);
/// Define inequality on occurrence handles
bool operator!=(const occurrence_handle_t& a, const occurrence_handle_t& b);

/// represents a null handle
extern const handle_t null_handle;

}

// Hashes need to be in the std namespace
Expand Down