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Diffstat (limited to 'tests/functional/lang/eval-okay-foldlStrict-lazy-initial-accumulator.nix')
| -rw-r--r-- | tests/functional/lang/eval-okay-foldlStrict-lazy-initial-accumulator.nix | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tests/functional/lang/eval-okay-foldlStrict-lazy-initial-accumulator.nix b/tests/functional/lang/eval-okay-foldlStrict-lazy-initial-accumulator.nix new file mode 100644 index 000000000..abcd5366a --- /dev/null +++ b/tests/functional/lang/eval-okay-foldlStrict-lazy-initial-accumulator.nix @@ -0,0 +1,6 @@ +# Checks that the nul value for the accumulator is not forced unconditionally. +# Some languages provide a foldl' that is strict in this argument, but Nix does not. +builtins.foldl' + (_: x: x) + (throw "This is never forced") + [ "but the results of applying op are" 42 ] |