Niels Lohmann
6a852ab96d
* Split the json_view feature page into sub-pages
The single features/json_view.md page grew to ~600 lines covering eight
topics. Split it into features/json_view/ with an overview page and
pages for ownership and lifetime, differences from basic_json, reading
values, generic code, editing, and images.
The new differences page collects what was spread over several sections
("What is the same", "What is different", "Duplicate keys", and notes in
the conversion and serialization sections) under one summary table, and
adds the parts of the basic_json interface a view does not have. The
other pages now link to it instead of restating the rules.
Internal links across the documentation point to the new pages.
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
* Docs: fix stale comments and trim repeated text in json_view pages
- fig-jsonview.js/.css: point the header comments at the new pages
- reading.md: views' strings are valid as long as the document (and a
borrowed source text), as lifetime.md says
- reading.md, generic_code.md: link to differences.md instead of
restating the member-order and repeated-key rules
- differences.md: drop the third mention of ordering comparisons, name
rbegin()/rend() in the iterator row
- exceptions.md: link editable documents to editing.md
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
---------
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
1.2 KiB
1.2 KiB
nlohmann::basic_json_document::source
view_type::string_view_t source() const noexcept;
Returns the parsed text, whether it is borrowed from the caller or owned by the document.
Return value
A #!cpp string_view_t (#!cpp std::string_view on C++17 and newer) over the parsed text, or an empty one if the
document is discarded.
Exception safety
No-throw guarantee: this function never throws exceptions.
Complexity
Constant.
Notes
For a borrowed document, source() points directly into the caller's buffer, so it is only valid while that buffer
is; see owns_source.
Examples
??? example
```cpp
--8<-- "examples/basic_json_document__source.cpp"
```
Output:
```json
--8<-- "examples/basic_json_document__source.output"
```
See also
owns_source- return whether the document holds its own copy of the textsource_offset- byte offset of a value in the source text- Zero-copy JSON views - who owns the source text and for how long
Version history
- Added in version 3.13.0.