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Diffstat (limited to 'src/libstore/store-cast.hh')
| -rw-r--r-- | src/libstore/store-cast.hh | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/libstore/store-cast.hh b/src/libstore/store-cast.hh index ff62fc359..ccd19e5ad 100644 --- a/src/libstore/store-cast.hh +++ b/src/libstore/store-cast.hh @@ -4,6 +4,13 @@ namespace nix { +/** + * Helper to try downcasting a Store with a nice method if it fails. + * + * This is basically an alternative to the user-facing part of + * Store::unsupported that allows us to still have a nice message but + * better interface design. + */ template<typename T> T & require(Store & store) { |