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| author | Nicolas Pierron <nicolas.b.pierron@gmail.com> | 2011-03-30 11:18:10 +0000 |
|---|---|---|
| committer | Nicolas Pierron <nicolas.b.pierron@gmail.com> | 2011-03-30 11:18:10 +0000 |
| commit | 11472a05010c6c74940d980e08d4297f66e051a3 (patch) | |
| tree | 4410cd6842490989adb362e5a665ac123f6f6ffc /pkgs/lib | |
| parent | 56ade5fef2dc87d5532fd1e9d8870d2e99095ef2 (diff) | |
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Add mkAssert.
svn path=/nixpkgs/trunk/; revision=26600
Diffstat (limited to 'pkgs/lib')
| -rw-r--r-- | pkgs/lib/properties.nix | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/pkgs/lib/properties.nix b/pkgs/lib/properties.nix index 46854d0e1431..d7df14f716f5 100644 --- a/pkgs/lib/properties.nix +++ b/pkgs/lib/properties.nix @@ -223,6 +223,11 @@ rec { content = mkNotdef; }; + mkAssert = assertion: message: content: + mkIf + (if assertion then true else throw "\nFailed assertion: ${message}") + content; + # Remove all "If" statement defined on a value. rmIf = foldProperty ( foldFilter isIf |