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nlohmann
2026-10-04 15:46:44 +00:00
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api/basic_json/dump/index.md
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@@ -17,7 +17,7 @@ Serialization function for JSON values. The function tries to mimic Python's [`j
`ensure_ascii` (in) : If `ensure_ascii` is true, all non-ASCII characters in the output are escaped with `\uXXXX` sequences, and the result consists of ASCII characters only.
`error_handler` (in) : how to react on decoding errors; there are three possible values (see [`error_handler_t`](https://json.nlohmann.me/api/basic_json/error_handler_t/index.md): `strict` (throws an exception in case a decoding error occurs; default), `replace` (replace invalid UTF-8 sequences with U+FFFD), and `ignore` (ignore invalid UTF-8 sequences during serialization; all valid bytes are copied to the output unchanged, and invalid bytes are dropped)).
`error_handler` (in) : how to react on decoding errors; there are four possible values (see [`error_handler_t`](https://json.nlohmann.me/api/basic_json/error_handler_t/index.md): `strict` (throws an exception in case a decoding error occurs; default), `replace` (replace invalid UTF-8 sequences with U+FFFD), `ignore` (ignore invalid UTF-8 sequences during serialization; all valid bytes are copied to the output unchanged, and invalid bytes are dropped), and `keep` (write the ill-formed bytes to the output as is, without escaping them, even if `ensure_ascii` is `true`; the result is then not valid UTF-8, but equals the input bytes exactly, and well-formed characters around the ill-formed bytes are still escaped as usual)).
## Return value
@@ -177,3 +177,4 @@ string with ignored invalid characters: "äü"
- Indentation character `indent_char`, option `ensure_ascii` and exceptions added in version 3.0.0.
- Error handlers added in version 3.4.0.
- Serialization of binary values added in version 3.8.0.
- Error handler `keep` added in version 3.13.0 unreleased.