Merge pull request #2184 from nvmkuruc/ndrhash

Replace boost hash usage with TfHash in pxr/usd/ndr

(Internal change: 2264249)

pxr/usd/ndr/registry.cpp

@@ -23,6 +23,7 @@
 //
 
 #include "pxr/pxr.h"
+#include "pxr/base/tf/hash.h"
 #include "pxr/base/tf/pathUtils.h"
 #include "pxr/base/tf/stringUtils.h"
 #include "pxr/base/tf/type.h"
@@ -41,8 +42,6 @@
 #include "pxr/base/plug/registry.h"
 #include "pxr/base/tf/envSetting.h"
 
-#include <boost/functional/hash.hpp>
-
 PXR_NAMESPACE_OPEN_SCOPE
 
 TF_DEFINE_ENV_SETTING(
@@ -165,11 +164,9 @@ _GetIdentifierForAsset(const SdfAssetPath &asset,
                        const TfToken &subIdentifier,
                        const TfToken &sourceType)
 {
-    size_t h = 0;
-    boost::hash_combine(h, asset);
-    for (const auto &i : metadata) { 
-        boost::hash_combine(h, i.first.GetString());
-        boost::hash_combine(h, i.second);
+    size_t h = TfHash()(asset);
+    for (const auto &i : metadata) {
+        h = TfHash::Combine(h, i.first.GetString(), i.second);
     }
 
     return NdrIdentifier(TfStringPrintf(
@@ -183,11 +180,9 @@ static NdrIdentifier
 _GetIdentifierForSourceCode(const std::string &sourceCode, 
                             const NdrTokenMap &metadata) 
 {
-    size_t h = 0;
-    boost::hash_combine(h, sourceCode);
-    for (const auto &i : metadata) { 
-        boost::hash_combine(h, i.first.GetString());
-        boost::hash_combine(h, i.second);
+    size_t h = TfHash()(sourceCode);
+    for (const auto &i : metadata) {
+        h = TfHash::Combine(h, i.first.GetString(), i.second);
     }
     return NdrIdentifier(std::to_string(h));
 }