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Only provide builtin.{getFlake,fetchClosure} is the corresponding experimental feature is enabled

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This allows writing fallback code like

  if builtins ? fetchClosure then
    builtins.fetchClose { ... }
  else
    builtins.storePath ...
This commit is contained in:
Eelco Dolstra 2022-03-25 14:04:18 +01:00
parent 55bc524019
commit 86b05ccd54
8 changed files with 31 additions and 39 deletions
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6
src/libexpr/eval.hh
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@ -149,12 +149,6 @@ public:
std::shared_ptr<Store> buildStore = nullptr);
~EvalState();
void requireExperimentalFeatureOnEvaluation(
const ExperimentalFeature &,
const std::string_view fName,
const Pos & pos
);
void addToSearchPath(const std::string & s);
SearchPath getSearchPath() { return searchPath; }