From efc08de5d6876af140f5a6ddb254698eb243b2fc Mon Sep 17 00:00:00 2001
From: Kit Ewbank <Christopher.Ewbank@capitalone.com>
Date: Wed, 24 Apr 2019 14:52:39 -0400
Subject: [PATCH] lang/funcs: add 'strrev' interpolation function. (#21091)

---
 lang/functions.go                             |  1 +
 .../configuration/functions/reverse.html.md   |  4 +++
 .../configuration/functions/strrev.html.md    | 29 +++++++++++++++++++
 website/layouts/functions.erb                 |  4 +++
 4 files changed, 38 insertions(+)
 create mode 100644 website/docs/configuration/functions/strrev.html.md

diff --git a/lang/functions.go b/lang/functions.go
index bcda0e2966..7806f2921e 100644
--- a/lang/functions.go
+++ b/lang/functions.go
@@ -99,6 +99,7 @@ func (s *Scope) Functions() map[string]function.Function {
 			"slice":            funcs.SliceFunc,
 			"sort":             funcs.SortFunc,
 			"split":            funcs.SplitFunc,
+			"strrev":           stdlib.ReverseFunc,
 			"substr":           stdlib.SubstrFunc,
 			"timestamp":        funcs.TimestampFunc,
 			"timeadd":          funcs.TimeAddFunc,
diff --git a/website/docs/configuration/functions/reverse.html.md b/website/docs/configuration/functions/reverse.html.md
index a272932ee6..d9febecad9 100644
--- a/website/docs/configuration/functions/reverse.html.md
+++ b/website/docs/configuration/functions/reverse.html.md
@@ -25,3 +25,7 @@ with all of the same elements as the given sequence but in reverse order.
   1,
 ]
 ```
+
+## Related Functions
+
+* [`strrev`](./strrev.html) reverses a string.
diff --git a/website/docs/configuration/functions/strrev.html.md b/website/docs/configuration/functions/strrev.html.md
new file mode 100644
index 0000000000..630a682630
--- /dev/null
+++ b/website/docs/configuration/functions/strrev.html.md
@@ -0,0 +1,29 @@
+---
+layout: "functions"
+page_title: "strrev - Functions - Configuration Language"
+sidebar_current: "docs-funcs-string-strrev"
+description: |-
+  The strrev function reverses a string.
+---
+
+# `strrev` Function
+
+`strrev` reverses the characters in a string.
+Note that the characters are treated as _Unicode characters_ (in technical terms, Unicode [grapheme cluster boundaries](https://unicode.org/reports/tr29/#Grapheme_Cluster_Boundaries) are respected).
+
+```hcl
+strrev(string)
+```
+
+## Examples
+
+```
+> strrev("hello")
+olleh
+> strrev("a ☃")
+☃ a
+```
+
+## Related Functions
+
+* [`reverse`](./reverse.html) reverses a sequence.
diff --git a/website/layouts/functions.erb b/website/layouts/functions.erb
index 50f65c61bd..8365673723 100644
--- a/website/layouts/functions.erb
+++ b/website/layouts/functions.erb
@@ -87,6 +87,10 @@
                 <a href="/docs/configuration/functions/split.html">split</a>
               </li>
 
+              <li>
+                <a href="/docs/configuration/functions/strrev.html">strrev</a>
+              </li>
+
               <li>
                 <a href="/docs/configuration/functions/substr.html">substr</a>
               </li>