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Merge pull request #131267 from blaggacao/fix-functionArgs

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lib: fix functionArgs for functors
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Silvan Mosberger 2021-08-04 00:02:57 +02:00 committed by GitHub
parent 1ab9b0e31d cf8e219b7e
commit f0fda3bf55
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2 changed files with 14 additions and 1 deletions
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10
lib/tests/misc.nix
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@ -132,6 +132,16 @@ runTests {
expected = [ 1 1 0 ];
};
testFunctionArgsFunctor = {
expr = functionArgs { __functor = self: { a, b }: null; };
expected = { a = false; b = false; };
};
testFunctionArgsSetFunctionArgs = {
expr = functionArgs (setFunctionArgs (args: args.x) { x = false; });
expected = { x = false; };
};
# STRINGS
testConcatMapStrings = {

5
lib/trivial.nix
View file

@ -334,7 +334,10 @@ rec {
has the same return type and semantics as builtins.functionArgs.
setFunctionArgs : (a → b) → Map String Bool.
*/
functionArgs = f: f.__functionArgs or (builtins.functionArgs f);
functionArgs = f:
if f ? __functor
then f.__functionArgs or (lib.functionArgs (f.__functor f))
else builtins.functionArgs f;
/* Check whether something is a function or something
annotated with function args.