mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-24 14:56:15 +02:00
31 lines
1.1 KiB
XML
31 lines
1.1 KiB
XML
|
<chapter xmlns="http://docbook.org/ns/docbook"
|
||
|
|
xmlns:xlink="http://www.w3.org/1999/xlink"
|
||
|
|
xmlns:xi="http://www.w3.org/2001/XInclude"
|
||
|
|
version="5.0"
|
||
|
|
xml:id="ch-expression-language">
|
||
|
|
|
||
|
|
<title>Nix Expression Language</title>
|
||
|
|
|
||
|
|
<para>The Nix expression language is a pure, lazy, functional
|
||
|
|
language. Purity means that operations in the language don't have
|
||
|
|
side-effects (for instance, there is no variable assignment).
|
||
|
|
Laziness means that arguments to functions are evaluated only when
|
||
|
|
they are needed. Functional means that functions are
|
||
|
|
<quote>normal</quote> values that can be passed around and manipulated
|
||
|
|
in interesting ways. The language is not a full-featured, general
|
||
|
|
purpose language. Its main job is to describe packages,
|
||
|
|
compositions of packages, and the variability within
|
||
|
|
packages.</para>
|
||
|
|
|
||
|
|
<para>This section presents the various features of the
|
||
|
|
language.</para>
|
||
|
|
|
||
|
|
<xi:include href="language-values.xml" />
|
||
|
|
<xi:include href="language-constructs.xml" />
|
||
|
|
<xi:include href="language-operators.xml" />
|
||
|
|
<xi:include href="derivations.xml" />
|
||
|
|
<xi:include href="builtins.xml" />
|
||
|
|
|
||
|
|
|
||
|
|
</chapter>
|