From 095cffecbd6c34105468c42414cef445dc1c0998 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Thu, 10 Jun 2021 21:43:56 +0300
Subject: Add path::try_relative()

---
 libbutl/path.mxx | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'libbutl/path.mxx')

diff --git a/libbutl/path.mxx b/libbutl/path.mxx
index 12479ce..5a41ddc 100644
--- a/libbutl/path.mxx
+++ b/libbutl/path.mxx
@@ -952,6 +952,12 @@ LIBBUTL_MODEXPORT namespace butl
     basic_path
     relative (basic_path) const;
 
+    // As above but return nullopt rather than throw if a relative path cannot
+    // be derived.
+    //
+    optional<basic_path>
+    try_relative (basic_path) const;
+
     // Iteration over path components.
     //
     // Note that for an absolute POSIX path the first component is empty,
-- 
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