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primop functions listToAttrs (+test), __isAttrs, __trace added

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new configuration style proposal in lib/default-unstable.nix
This commit is contained in:
Marc Weber 2007-08-18 22:12:00 +00:00
parent dbc0170ed9
commit 2629998e91
3 changed files with 62 additions and 0 deletions
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tests/lang/eval-okay-listToAttrs.nix Normal file
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# this test shows how to use listToAttrs and that evaluation is still lazy (throw isn't called)
let
asi = attr: value : { inherit attr value; };
list = [ ( asi "a" "A" ) ( asi "b" "B" ) ];
a = builtins.listToAttrs list;
b = builtins.listToAttrs ( list ++ list );
r = builtins.listToAttrs [ (asi "result" [ a b ]) ( asi "throw" (throw "this should not be thrown")) ];
in r.result

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tests/lang/eval-okay-listToAttrs.out Normal file
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List([Attrs([Bind("a",Str("A",[]),NoPos),Bind("b",Str("B",[]),NoPos)]),Attrs([Bind("a",Str("A",[]),NoPos),Bind("b",Str("B",[]),NoPos)])])