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| author | Robert Hensing <robert@roberthensing.nl> | 2022-03-21 23:06:01 +0100 |
|---|---|---|
| committer | Robert Hensing <robert@roberthensing.nl> | 2022-03-21 23:14:10 +0100 |
| commit | 84274cbc95b370bf8e38430453b48b7017671a8a (patch) | |
| tree | 75ded95befa762cf6733c8895b50e490035ec488 /lib | |
| parent | 6a0b24b27675d03a7f24c124e6c145076104e869 (diff) | |
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lib: Add toFunction
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/default.nix | 3 | ||||
| -rw-r--r-- | lib/trivial.nix | 19 |
2 files changed, 21 insertions, 1 deletions
diff --git a/lib/default.nix b/lib/default.nix index 1746efc6819..2d231bbd2d9 100644 --- a/lib/default.nix +++ b/lib/default.nix @@ -68,7 +68,8 @@ let bitNot boolToString mergeAttrs flip mapNullable inNixShell isFloat min max importJSON importTOML warn warnIf throwIfNot checkListOfEnum info showWarnings nixpkgsVersion version - mod compare splitByAndCompare functionArgs setFunctionArgs isFunction + mod compare splitByAndCompare + functionArgs setFunctionArgs isFunction toFunction toHexString toBaseDigits; inherit (self.fixedPoints) fix fix' converge extends composeExtensions composeManyExtensions makeExtensible makeExtensibleWithCustomName; diff --git a/lib/trivial.nix b/lib/trivial.nix index c68bac902e9..52648125059 100644 --- a/lib/trivial.nix +++ b/lib/trivial.nix @@ -403,6 +403,25 @@ rec { isFunction = f: builtins.isFunction f || (f ? __functor && isFunction (f.__functor f)); + /* + Turns any non-callable values into constant functions. + Returns callable values as is. + + Example: + + nix-repl> lib.toFunction 1 2 + 1 + + nix-repl> lib.toFunction (x: x + 1) 2 + 3 + */ + toFunction = + # Any value + v: + if isFunction v + then v + else k: v; + /* Convert the given positive integer to a string of its hexadecimal representation. For example: |