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Remove backward-compatible implementations of some primops

Nixpkgs requires at least Nix 1.2 anyway, so these are now useless.
This commit is contained in:
Eelco Dolstra 2013-11-12 13:50:45 +01:00
parent 785eaf2cea
commit a8b693fef7
2 changed files with 3 additions and 21 deletions

View file

@ -20,7 +20,7 @@ rec {
let attr = head attrPath;
in
if attrPath == [] then e
else if builtins ? hasAttr && hasAttr attr e
else if hasAttr attr e
then attrByPath (tail attrPath) default (getAttr attr e)
else default;
@ -110,7 +110,7 @@ rec {
collect = pred: attrs:
if pred attrs then
[ attrs ]
else if builtins.isAttrs attrs then
else if isAttrs attrs then
concatMap (collect pred) (attrValues attrs)
else
[];

View file

@ -10,7 +10,7 @@ let
in rec {
inherit (builtins) head tail length isList elemAt;
inherit (builtins) head tail length isList elemAt concatLists filter elem;
# Create a list consisting of a single element. `singleton x' is
@ -58,10 +58,6 @@ in rec {
in imap' 0;
# Concatenate a list of lists.
concatLists = builtins.concatLists or (fold (x: y: x ++ y) []);
# Map and concatenate the result.
concatMap = f: list: concatLists (map f list);
@ -75,24 +71,10 @@ in rec {
else [x];
# Filter a list using a predicate; that is, return a list containing
# every element from `list' for which `pred' returns true.
filter =
builtins.filter or
(pred: list:
fold (x: y: if pred x then [x] ++ y else y) [] list);
# Remove elements equal to 'e' from a list. Useful for buildInputs.
remove = e: filter (x: x != e);
# Return true if `list' has an element `x'.
elem =
builtins.elem or
(x: list: fold (a: bs: x == a || bs) false list);
# Find the sole element in the list matching the specified
# predicate, returns `default' if no such element exists, or
# `multiple' if there are multiple matching elements.