concatLists

builtins.concatLists

Primop

Docs pulled from | This Revision | about 4 hours ago

Nix manual

Takes 1 arguments

lists

Concatenate a list of lists into a single list.

Time Complexity

O(N) where:

N = total number of elements across all lists

Noogle detected

Aliases

lib.concatLists
lib.lists.concatLists

Detected Type

concatLists :: [[a]] -> [a]

Implementation

This function is implemented in c++ and is part of the native nix runtime.

src/libexpr/primops.cc:3962

static void prim_concatLists(EvalState & state, const PosIdx pos, Value ** args, Value & v)
{
    state.forceList(*args[0], pos, "while evaluating the first argument passed to builtins.concatLists");
    auto listView = args[0]->listView();
    state.concatLists(v, listView.span(), pos, "while evaluating a value of the list passed to builtins.concatLists");
}