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Add deprecated from_bon8/from_bjdata(ptr, len) overloads

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from_bon8(ptr, len) and from_bjdata(ptr, len) had no overload for a
pointer and a length, unlike from_cbor/from_msgpack/from_ubjson/
from_bson. The call instead bound to from_*(InputType&&, bool strict),
which read ptr as a NUL-terminated C string via strlen and silently
converted len to the strict flag. Data containing a 0x00 byte was cut
off there; data without one was read past the end of the buffer.

Add a deprecated (ptr, len, strict, allow_exceptions) overload for
each function that forwards to (ptr, ptr + len, ...), matching the
existing deprecated overloads of the other four binary readers. Since
neither function ever had this overload, the deprecation is declared
as of version 3.13.0, the next unreleased version, rather than the
version each function was originally added in.

Fixes #5648.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann
2026-09-29 23:26:44 +02:00
parent 633de8e44b
commit 1e6257bf49
6 changed files with 114 additions and 0 deletions
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docs/mkdocs/docs/api/basic_json/from_bjdata.md
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@@ -111,3 +111,12 @@ Linear in the size of the input.
- Added in version 3.11.0.
- Extended container support (1) to include types with lvalue-only ADL `begin`/`end` (matching `std::begin`/`std::end` semantics) in version 3.13.0.
- Extended overload (2) to accept heterogeneous iterator+sentinel pairs (C++20 ranges support) in version 3.13.0.
!!! warning "Deprecation"
- Overload (2) replaces calls to `from_bjdata` with a pointer and a length as first two parameters, which has been
deprecated in version 3.13.0. This overload will be removed in version 4.0.0. Please replace all calls like
`#!cpp from_bjdata(ptr, len, ...);` with `#!cpp from_bjdata(ptr, ptr+len, ...);`.
You should be warned by your compiler with a `-Wdeprecated-declarations` warning if you are using a deprecated
function.
docs/mkdocs/docs/api/basic_json/from_bon8.md
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@@ -106,3 +106,12 @@ Linear in the size of the input.
## Version history
- Added in version 3.13.0.
!!! warning "Deprecation"
- Overload (2) replaces calls to `from_bon8` with a pointer and a length as first two parameters, which has been
deprecated in version 3.13.0. This overload will be removed in version 4.0.0. Please replace all calls like
`#!cpp from_bon8(ptr, len, ...);` with `#!cpp from_bon8(ptr, ptr+len, ...);`.
You should be warned by your compiler with a `-Wdeprecated-declarations` warning if you are using a deprecated
function.