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author | Profpatsch <mail@profpatsch.de> | 2018-08-06 01:36:09 +0200 |
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committer | Profpatsch <mail@profpatsch.de> | 2018-09-06 18:14:27 +0200 |
commit | 3e45b61a9920466a8ea06b8ad9350d56ade435bc (patch) | |
tree | 1913cb4951336a37ed9921a538db5a50c7b62008 /lib/strings.nix | |
parent | 320cdecd1697020cb367adc1f8408dbf689ca254 (diff) | |
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lib/trivial: add a few examples of usage of assertMsg/assertOneOf
Diffstat (limited to 'lib/strings.nix')
-rw-r--r-- | lib/strings.nix | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/strings.nix b/lib/strings.nix index 833f69d2fbf..0c4095bb55c 100644 --- a/lib/strings.nix +++ b/lib/strings.nix @@ -410,7 +410,7 @@ rec { components = splitString "/" url; filename = lib.last components; name = builtins.head (splitString sep filename); - in assert name != filename; name; + in assert name != filename; name; /* Create an --{enable,disable}-<feat> string that can be passed to standard GNU Autoconf scripts. @@ -468,7 +468,10 @@ rec { strw = lib.stringLength str; reqWidth = width - (lib.stringLength filler); in - assert strw <= width; + assert lib.assertMsg (strw <= width) + "fixedWidthString: requested string length (${ + toString width}) must not be shorter than actual length (${ + toString strw})"; if strw == width then str else filler + fixedWidthString reqWidth filler str; /* Format a number adding leading zeroes up to fixed width. |