From 3dea81d9be4712aa90ba79f333338c0b3ecb21e2 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Sat, 21 Nov 2020 13:55:11 +0100
Subject: Make GeographicCRS/GeodeticCRS::isEquivalentTo() work properly when
 comparing to a DerivedGeographicCRS/DerivedGeodeticCRS

---
 include/proj/util.hpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'include/proj/util.hpp')

diff --git a/include/proj/util.hpp b/include/proj/util.hpp
index 3d85e579..2ada4f79 100644
--- a/include/proj/util.hpp
+++ b/include/proj/util.hpp
@@ -213,6 +213,14 @@ template <typename T> using nn_shared_ptr = nn<std::shared_ptr<T>>;
 // To avoid formatting differences between clang-format 3.8 and 7
 #define PROJ_NOEXCEPT noexcept
 
+//! @cond Doxygen_Suppress
+// isOfExactType<MyType>(*p) checks that the type of *p is exactly MyType
+template <typename TemplateT, typename ObjectT>
+inline bool isOfExactType(const ObjectT &o) {
+    return typeid(TemplateT).hash_code() == typeid(o).hash_code();
+}
+//! @endcond
+
 /** \brief Loose transposition of [std::optional]
  * (https://en.cppreference.com/w/cpp/utility/optional) available from C++17. */
 template <class T> class optional {
-- 
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