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2026-10-02 15:15:16 +00:00
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api/macros/json_use_global_udls.md
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@@ -15,7 +15,7 @@ The default value is `1`.
#define JSON_USE_GLOBAL_UDLS 1
```
When the macro is not defined, the library will define it to its default value.
When the macro is not defined, the library behaves as if it were defined to its default value.
## Notes
@@ -32,6 +32,11 @@ When the macro is not defined, the library will define it to its default value.
[`JSON_GlobalUDLs`](../../integration/cmake.md#json_globaludls) (`ON` by default) which defines
`JSON_USE_GLOBAL_UDLS` accordingly.
!!! info "Leaving out the literals"
If [`JSON_NO_AUTOMATIC_UDLS`](json_no_automatic_udls.md) is defined, the literals are only declared where
`<nlohmann/json_literals.hpp>` is included; this macro then applies to that header.
## Examples
??? example "Example 1: Default behavior"
@@ -92,6 +97,7 @@ When the macro is not defined, the library will define it to its default value.
- [`operator""_json`](../operator_literal_json.md)
- [`operator""_json_pointer`](../operator_literal_json_pointer.md)
- [`JSON_NO_AUTOMATIC_UDLS`](json_no_automatic_udls.md) - do not include the user-defined string literals automatically
- [:simple-cmake: JSON_GlobalUDLs](../../integration/cmake.md#json_globaludls) - CMake option to control the macro
## Version history