deploy: 40a62947d3

features/macros.md

@@ -82,6 +82,45 @@ To override the built-in check, define `JSON_HAS_FILESYSTEM` or `JSON_HAS_EXPERI
 
 See [full documentation of `JSON_HAS_FILESYSTEM` and `JSON_HAS_EXPERIMENTAL_FILESYSTEM`](../api/macros/json_has_filesystem.md).
 
+## `JSON_HAS_RANGES`
+
+The library uses `std::ranges` (and concepts) where available, for example, to parse from C++20 ranges and to
+construct JSON arrays from range views. The library detects whether the standard library supports ranges and
+disables the support on toolchains with an incomplete implementation. To override the built-in check, define
+`JSON_HAS_RANGES` to `1` or `0`.
+
+See [full documentation of `JSON_HAS_RANGES`](../api/macros/json_has_ranges.md).
+
+## `JSON_HAS_RANGE_VIEW_CONVERSION`
+
+When `JSON_HAS_RANGES` is enabled (and the compiler is not MinGW), a JSON array can be constructed directly from a C++20
+range view such as `std::views::filter(...)`. To override the built-in check, define `JSON_HAS_RANGE_VIEW_CONVERSION` to
+`1` or `0`.
+
+See [full documentation of `JSON_HAS_RANGE_VIEW_CONVERSION`](../api/macros/json_has_range_view_conversion.md).
+
+## `JSON_HAS_STATIC_RTTI`
+
+The library detects whether the compiler supports run time type information (RTTI), which it needs, for instance, to
+exclude `std::any` from the candidate types of the implicit conversion on C++17. To override the built-in check, define
+`JSON_HAS_STATIC_RTTI` to `1` or `0`.
+
+See [full documentation of `JSON_HAS_STATIC_RTTI`](../api/macros/json_has_static_rtti.md).
+
+## `JSON_HAS_STD_FORMAT`
+
+When compiling with C++20 and a standard library that provides `<format>`, the library provides a `std::formatter`
+specialization for JSON values. To override the built-in check, define `JSON_HAS_STD_FORMAT` to `1` or `0`.
+
+See [full documentation of `JSON_HAS_STD_FORMAT`](../api/macros/json_has_std_format.md).
+
+## `JSON_HAS_THREE_WAY_COMPARISON`
+
+When the compiler and standard library support 3-way comparison (the spaceship operator `<=>`), the library provides it
+for JSON values. To override the built-in check, define `JSON_HAS_THREE_WAY_COMPARISON` to `1` or `0`.
+
+See [full documentation of `JSON_HAS_THREE_WAY_COMPARISON`](../api/macros/json_has_three_way_comparison.md).
+
 ## `JSON_NOEXCEPTION`
 
 Exceptions can be switched off by defining the symbol `JSON_NOEXCEPTION`.