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diff --git a/doc/manual/expressions/expression-language.xml b/doc/manual/expressions/expression-language.xml new file mode 100644 index 000000000000..240ef80f1463 --- /dev/null +++ b/doc/manual/expressions/expression-language.xml @@ -0,0 +1,30 @@ +<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> |