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| author | Eelco Dolstra <edolstra@gmail.com> | 2016-12-15T11·31+0100 |
|---|---|---|
| committer | Eelco Dolstra <edolstra@gmail.com> | 2016-12-15T11·31+0100 |
| commit | 5278bb7c16c227d64551fc6578cb1b1b22f3b036 (patch) | |
| tree | 1b5af104e7fadaf20b9caea9964e4a4da82ac192 /doc/manual/expressions/builtins.xml | |
| parent | 1df82b62456b3194b3d8be0562e886cf16bf9379 (diff) | |
| parent | f867f090ed198e0e7f7e2db32b9e282883bf63b7 (diff) | |
Merge branch 'master' of github.com:NixOS/nix
Diffstat (limited to 'doc/manual/expressions/builtins.xml')
| -rw-r--r-- | doc/manual/expressions/builtins.xml | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml index 9517f20106ef..063bc04be483 100644 --- a/doc/manual/expressions/builtins.xml +++ b/doc/manual/expressions/builtins.xml @@ -210,6 +210,35 @@ if builtins ? getEnv then builtins.getEnv "PATH" else ""</programlisting> </varlistentry> + <varlistentry><term><function>builtins.match</function> + <replaceable>regex</replaceable> <replaceable>str</replaceable></term> + + <listitem><para>Returns a list if + <replaceable>regex</replaceable> matches + <replaceable>str</replaceable> precisely, otherwise returns <literal>null</literal>. + Each item in the list is a regex group. + +<programlisting> +builtins.match "ab" "abc" +</programlisting> + +Evaluates to <literal>null</literal>. + +<programlisting> +builtins.match "abc" "abc" +</programlisting> + +Evaluates to <literal>[ ]</literal>. + +<programlisting> +builtins.match "a(b)(c)" "abc" +</programlisting> + +Evaluates to <literal>[ "b" "c" ]</literal>. + + + </para></listitem> + </varlistentry> <varlistentry><term><function>builtins.elem</function> <replaceable>x</replaceable> <replaceable>xs</replaceable></term> |