From 9f55a7aabe9296bc40ea658a0bddc5b4e602f259 Mon Sep 17 00:00:00 2001
From: "Frank T. Bergmann" <fbergman@caltech.edu>
Date: Sun, 26 May 2024 12:19:37 +0000
Subject: [PATCH] #374: use equal_range

---
 src/sbml/validator/constraints/AssignmentCycles.cpp | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/sbml/validator/constraints/AssignmentCycles.cpp b/src/sbml/validator/constraints/AssignmentCycles.cpp
index 7e6a52b8b..f6a1be154 100644
--- a/src/sbml/validator/constraints/AssignmentCycles.cpp
+++ b/src/sbml/validator/constraints/AssignmentCycles.cpp
@@ -274,13 +274,12 @@ bool
 AssignmentCycles::alreadyExistsInMap(IdMap& map, 
                                      const pair<const std::string, std::string>& dependency) const
 {
-  IdIter it;
-  
-  for (it = map.begin(); it != map.end(); ++it)
+  auto range = map.equal_range(dependency.first);
+
+  for (auto it = range.first; it != range.second; ++it)
   {
-    if (((*it).first == dependency.first)
-      && ((*it).second == dependency.second))
-      return true;
+      if (it->second == dependency.second)
+          return true;
   }
 
   return false;