🔨 some clean up

develop/detail/iterators/internal_iterator.hpp

@@ -1,5 +1,4 @@
-#ifndef NLOHMANN_JSON_DETAIL_ITERATORS_INTERNAL_ITERATOR_HPP
-#define NLOHMANN_JSON_DETAIL_ITERATORS_INTERNAL_ITERATOR_HPP
+#pragma once
 
 #include "detail/iterators/primitive_iterator.hpp"
 
@@ -24,5 +23,3 @@ template<typename BasicJsonType> struct internal_iterator
 };
 }
 }
-
-#endif

develop/detail/iterators/iter_impl.hpp

@@ -1,5 +1,4 @@
-#ifndef NLOHMANN_JSON_DETAIL_ITERATORS_ITER_IMPL_HPP
-#define NLOHMANN_JSON_DETAIL_ITERATORS_ITER_IMPL_HPP
+#pragma once
 
 #include <ciso646> // not
 #include <iterator> // iterator, random_access_iterator_tag, bidirectional_iterator_tag, advance, next
@@ -613,5 +612,3 @@ class iter_impl
 };
 }
 }
-
-#endif

develop/detail/iterators/iteration_proxy.hpp

@@ -1,5 +1,4 @@
-#ifndef NLOHMANN_JSON_DETAIL_ITERATORS_ITERATION_PROXY_HPP
-#define NLOHMANN_JSON_DETAIL_ITERATORS_ITERATION_PROXY_HPP
+#pragma once
 
 #include <cstddef> // size_t
 #include <string> // string, to_string
@@ -97,5 +96,3 @@ template<typename IteratorType> class iteration_proxy
 };
 }
 }
-
-#endif

develop/detail/iterators/json_reverse_iterator.hpp

@@ -1,5 +1,4 @@
-#ifndef NLOHMANN_JSON_DETAIL_ITERATORS_JSON_REVERSE_ITERATOR_HPP
-#define NLOHMANN_JSON_DETAIL_ITERATORS_JSON_REVERSE_ITERATOR_HPP
+#pragma once
 
 #include <cstddef> // ptrdiff_t
 #include <iterator> // reverse_iterator
@@ -118,5 +117,3 @@ class json_reverse_iterator : public std::reverse_iterator<Base>
 };
 }
 }
-
-#endif

develop/detail/iterators/primitive_iterator.hpp

@@ -1,5 +1,4 @@
-#ifndef NLOHMANN_JSON_DETAIL_ITERATORS_PRIMITIVE_ITERATOR_HPP
-#define NLOHMANN_JSON_DETAIL_ITERATORS_PRIMITIVE_ITERATOR_HPP
+#pragma once
 
 #include <ciso646> // not
 #include <cstddef> // ptrdiff_t
@@ -127,5 +126,3 @@ class primitive_iterator_t
 };
 }
 }
-
-#endif