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| author | Linus Heckemann <git@sphalerite.org> | 2017-04-17T09·33+0100 |
|---|---|---|
| committer | Linus Heckemann <git@sphalerite.org> | 2017-04-17T09·33+0100 |
| commit | 9622d00afa6e94ef3ca026f9e15a7d122566e7d0 (patch) | |
| tree | ba515936557f180b28172654f3d56164b2a32d8b /doc/manual/expressions | |
| parent | f8a2e8a55203f2cc16d70ad43afcc186adaab6b3 (diff) | |
Manual: document tryEval
Diffstat (limited to 'doc/manual/expressions')
| -rw-r--r-- | doc/manual/expressions/builtins.xml | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml index e9baff65961a..8a18b71008cb 100644 --- a/doc/manual/expressions/builtins.xml +++ b/doc/manual/expressions/builtins.xml @@ -1163,6 +1163,19 @@ stdenv.mkDerivation (rec { </varlistentry> + <varlistentry><term><function>builtins.tryEval</function> + <replaceable>e</replaceable></term> + + <listitem><para>Try to evaluate <replaceable>e</replaceable>. + Return a set containing the attributes <literal>success</literal> + (<literal>true</literal> if <replaceable>e</replaceable> evaluated + successfully, <literal>false</literal> if an error was thrown) and + <literal>value</literal>, equalling <replaceable>e</replaceable> + if successful and <literal>false</literal> otherwise. + </para></listitem> + + </varlistentry> + <varlistentry><term><function>builtins.typeOf</function> <replaceable>e</replaceable></term> |