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Fix JSON_IMPL macro to avoid extraneous copies

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Should take the thing we're serializing by reference.
This commit is contained in:
John Ericson 2025-09-23 13:05:12 -04:00
parent d9de675357
commit af71a9dbd9
7 changed files with 17 additions and 17 deletions
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18
src/libutil/include/nix/util/json-impls.hh
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@ -4,13 +4,13 @@
#include <nlohmann/json_fwd.hpp>
// Following https://github.com/nlohmann/json#how-can-i-use-get-for-non-default-constructiblenon-copyable-types
#define JSON_IMPL(TYPE) \
namespace nlohmann { \
using namespace nix; \
template<> \
struct adl_serializer<TYPE> \
{ \
static TYPE from_json(const json & json); \
static void to_json(json & json, TYPE t); \
}; \
#define JSON_IMPL(TYPE) \
namespace nlohmann { \
using namespace nix; \
template<> \
struct adl_serializer<TYPE> \
{ \
static TYPE from_json(const json & json); \
static void to_json(json & json, const TYPE & t); \
}; \
}