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fix error: 'optional' in namespace 'std' does not name a template type

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keke 2021-06-02 18:09:03 +08:00
parent 7c3cb8506f
commit 50dc88a56c
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1 changed files with 2 additions and 0 deletions
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src/libfetchers/attrs.hh
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@ -6,6 +6,8 @@
#include <nlohmann/json_fwd.hpp> #include <nlohmann/json_fwd.hpp>
#include <optional>
namespace nix::fetchers { namespace nix::fetchers {
typedef std::variant<std::string, uint64_t, Explicit<bool>> Attr; typedef std::variant<std::string, uint64_t, Explicit<bool>> Attr;