From bc09d5e64d53a393bd8148da1bcb3b524f999693 Mon Sep 17 00:00:00 2001
From: James Turner <james@flightgear.org>
Date: Wed, 12 Jan 2022 22:06:33 +0100
Subject: [PATCH] Airways: findEnroute by Positioned

Avoid any ambiguity with naming from the string version
---
 src/Navaids/airways.cxx | 15 +++++++++++++++
 src/Navaids/airways.hxx |  1 +
 2 files changed, 16 insertions(+)

diff --git a/src/Navaids/airways.cxx b/src/Navaids/airways.cxx
index ccb8a8fca..18e120de9 100644
--- a/src/Navaids/airways.cxx
+++ b/src/Navaids/airways.cxx
@@ -398,6 +398,21 @@ WayptRef Airway::findEnroute(const std::string &aIdent) const
     return {};
 }
 
+WayptRef Airway::findEnroute(const FGPositionedRef& nav) const
+{
+    loadWaypoints();
+    auto it = std::find_if(_elements.begin(), _elements.end(),
+                           [&nav](WayptRef w)
+    {
+        if (!w) return false;
+        return w->source() == nav;
+    });
+    
+    if (it != _elements.end())
+        return *it;
+    return {};
+}
+
 void Airway::Network::addEdge(int aWay, const SGGeod& aStartPos,
   const std::string& aStartIdent, 
   const SGGeod& aEndPos, const std::string& aEndIdent)
diff --git a/src/Navaids/airways.hxx b/src/Navaids/airways.hxx
index 5441dda03..ea4a5d7a4 100644
--- a/src/Navaids/airways.hxx
+++ b/src/Navaids/airways.hxx
@@ -90,6 +90,7 @@ public:
 
     bool containsNavaid(const FGPositionedRef& navaid) const;
 
+    WayptRef findEnroute(const FGPositionedRef& navaid) const;
     
 
   /**