Fix compile error with _HAS_STATIC_RTTI=0 (#4046)

nlohmann · Sep 24, 2023 · 6d4b72d · 6d4b72d
1 parent bbd2e16
commit 6d4b72d
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Showing 5 changed files with 57 additions and 4 deletions.
diff --git a/docs/mkdocs/docs/api/macros/json_has_static_rtti.md b/docs/mkdocs/docs/api/macros/json_has_static_rtti.md
@@ -0,0 +1,31 @@
+# JSON_HAS_STATIC_RTTI
+
+```cpp
+#define JSON_HAS_STATIC_RTTI /* value */
+```
+
+This macro indicates whether the standard library has any support for RTTI (run time type information).
+Possible values are `1` when supported or `0` when unsupported.
+
+## Default definition
+
+The default value is detected based on the preprocessor macro `#!cpp _HAS_STATIC_RTTI`.
+
+When the macro is not defined, the library will define it to its default value.
+
+## Examples
+
+??? example
+
+    The code below forces the library to enable support for libraries with RTTI dependence:
+
+    ```cpp
+    #define JSON_HAS_STATIC_RTTI 1
+    #include <nlohmann/json.hpp>
+
+    ...
+    ```
+
+## Version history
+
+- Added in version ?.
diff --git a/include/nlohmann/detail/macro_scope.hpp b/include/nlohmann/detail/macro_scope.hpp
@@ -133,6 +133,14 @@
     #endif
 #endif
 
+#ifndef JSON_HAS_STATIC_RTTI
+    #if !defined(_HAS_STATIC_RTTI) || _HAS_STATIC_RTTI != 0
+        #define JSON_HAS_STATIC_RTTI 1
+    #else
+        #define JSON_HAS_STATIC_RTTI 0
+    #endif
+#endif
+
 #ifdef JSON_HAS_CPP_17
     #define JSON_INLINE_VARIABLE inline
 #else

diff --git a/include/nlohmann/detail/macro_unscope.hpp b/include/nlohmann/detail/macro_unscope.hpp
@@ -38,6 +38,7 @@
     #undef JSON_HAS_EXPERIMENTAL_FILESYSTEM
     #undef JSON_HAS_THREE_WAY_COMPARISON
     #undef JSON_HAS_RANGES
+    #undef JSON_HAS_STATIC_RTTI
     #undef JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON
 #endif
 

diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
@@ -62,7 +62,9 @@
 #include <nlohmann/ordered_map.hpp>
 
 #if defined(JSON_HAS_CPP_17)
-    #include <any>
+    #if JSON_HAS_STATIC_RTTI
+        #include <any>
+    #endif
     #include <string_view>
 #endif
 
@@ -1886,7 +1888,7 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
 #if defined(JSON_HAS_CPP_17) && (defined(__GNUC__) || (defined(_MSC_VER) && _MSC_VER >= 1910 && _MSC_VER <= 1914))
                                                 detail::negation<std::is_same<ValueType, std::string_view>>,
 #endif
-#if defined(JSON_HAS_CPP_17)
+#if defined(JSON_HAS_CPP_17) && JSON_HAS_STATIC_RTTI
                                                 detail::negation<std::is_same<ValueType, std::any>>,
 #endif
                                                 detail::is_detected_lazy<detail::get_template_function, const basic_json_t&, ValueType>

diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
@@ -2485,6 +2485,14 @@ JSON_HEDLEY_DIAGNOSTIC_POP
     #endif
 #endif
 
+#ifndef JSON_HAS_STATIC_RTTI
+    #if !defined(_HAS_STATIC_RTTI) || _HAS_STATIC_RTTI != 0
+        #define JSON_HAS_STATIC_RTTI 1
+    #else
+        #define JSON_HAS_STATIC_RTTI 0
+    #endif
+#endif
+
 #ifdef JSON_HAS_CPP_17
     #define JSON_INLINE_VARIABLE inline
 #else
@@ -19268,7 +19276,9 @@ NLOHMANN_JSON_NAMESPACE_END
 
 
 #if defined(JSON_HAS_CPP_17)
-    #include <any>
+    #if JSON_HAS_STATIC_RTTI
+        #include <any>
+    #endif
     #include <string_view>
 #endif
 
@@ -21092,7 +21102,7 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
 #if defined(JSON_HAS_CPP_17) && (defined(__GNUC__) || (defined(_MSC_VER) && _MSC_VER >= 1910 && _MSC_VER <= 1914))
                                                 detail::negation<std::is_same<ValueType, std::string_view>>,
 #endif
-#if defined(JSON_HAS_CPP_17)
+#if defined(JSON_HAS_CPP_17) && JSON_HAS_STATIC_RTTI
                                                 detail::negation<std::is_same<ValueType, std::any>>,
 #endif
                                                 detail::is_detected_lazy<detail::get_template_function, const basic_json_t&, ValueType>
@@ -24498,6 +24508,7 @@ inline void swap(nlohmann::NLOHMANN_BASIC_JSON_TPL& j1, nlohmann::NLOHMANN_BASIC
     #undef JSON_HAS_EXPERIMENTAL_FILESYSTEM
     #undef JSON_HAS_THREE_WAY_COMPARISON
     #undef JSON_HAS_RANGES
+    #undef JSON_HAS_STATIC_RTTI
     #undef JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON
 #endif