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/crs.hpp  | 5 +++++
 include/proj/util.hpp | 8 ++++++++
 2 files changed, 13 insertions(+)

(limited to 'include')

diff --git a/include/proj/crs.hpp b/include/proj/crs.hpp
index ec755728..b921f4bb 100644
--- a/include/proj/crs.hpp
+++ b/include/proj/crs.hpp
@@ -340,6 +340,11 @@ class PROJ_GCC_DLL GeodeticCRS : virtual public SingleCRS,
     PROJ_INTERNAL std::list<std::pair<CRSNNPtr, int>>
     _identify(const io::AuthorityFactoryPtr &authorityFactory) const override;
 
+    PROJ_INTERNAL bool
+    _isEquivalentToNoTypeCheck(const util::IComparable *other,
+                               util::IComparable::Criterion criterion,
+                               const io::DatabaseContextPtr &dbContext) const;
+
     INLINED_MAKE_SHARED
 
   private:
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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