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Diffstat (limited to 'src/libstore/worker-protocol.hh')
| -rw-r--r-- | src/libstore/worker-protocol.hh | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/libstore/worker-protocol.hh b/src/libstore/worker-protocol.hh index c50995d7c..b3576fbeb 100644 --- a/src/libstore/worker-protocol.hh +++ b/src/libstore/worker-protocol.hh @@ -90,6 +90,13 @@ std::optional<T> read(const Store & store, Source & from, Phantom<std::optional< template<typename T> void write(const Store & store, Sink & out, const std::optional<T> & optVal); +/* Specialization which uses and empty string for the empty case, taking + advantage of the fact StorePaths always serialize to a non-empty string. + This is done primarily for backwards compatability, so that StorePath <= + std::optional<StorePath>, where <= is the compatability partial order. + */ +template<> +void write(const Store & store, Sink & out, const std::optional<StorePath> & optVal); template<typename T> std::map<std::string, T> read(const Store & store, Source & from, Phantom<std::map<std::string, T>> _) |