From e6d5f9148dea1a1a69d728056e9695e14f0fb050 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 28 Sep 2020 12:20:40 +0200
Subject: Add $string.trim() function

---
 libbuild2/functions-string.cxx   | 12 ++++++++++++
 tests/function/string/testscript |  7 +++++++
 2 files changed, 19 insertions(+)

diff --git a/libbuild2/functions-string.cxx b/libbuild2/functions-string.cxx
index da4fe02..f458a59 100644
--- a/libbuild2/functions-string.cxx
+++ b/libbuild2/functions-string.cxx
@@ -43,6 +43,18 @@ namespace build2
                        convert<string> (move (y))) == 0;
     };
 
+    // Trim.
+    //
+    f["trim"] = [](string s)
+    {
+      return trim (move (s));
+    };
+
+    f[".trim"] = [](names s)
+    {
+      return names {name (trim (convert<string> (move (s))))};
+    };
+
     // String-specific overloads from builtins.
     //
     function_family b (m, "builtin");
diff --git a/tests/function/string/testscript b/tests/function/string/testscript
index d42add7..9275fe5 100644
--- a/tests/function/string/testscript
+++ b/tests/function/string/testscript
@@ -24,3 +24,10 @@
     $* <'print $string.icasecmp("a", "b")'            >'false' : untyped-untyped
   }
 }
+
+: trim
+:
+{
+  $* <'print $trim([string] "  a  ")' >'a' : string
+  $* <'print $string.trim(  "  a  ")' >'a' : untyped
+}
-- 
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