Niels Lohmann 64a5d233d0 json_view: from_json() of the macros reads views directly ...

get<T>() and get_to() of a view call T's from_json() with the view itself
when that from_json() accepts views but not an unrelated probe type, and
fall back to materialize() otherwise. The from_json() functions of the
NLOHMANN_DEFINE_TYPE_*, NLOHMANN_DEFINE_DERIVED_TYPE_* and
NLOHMANN_JSON_SERIALIZE_ENUM(_STRICT) macros accept basic_json values and
views; a derived type whose base reads only json reads the base part
through materialize(). The library's own from_json() overloads are not
called with views: from_json() of a view (and of the probe) only looks up
functions by ADL.

New public trait nlohmann::is_json_view<T>, and the member type
basic_json_type of basic_json_view. With duplicate keys, the members of
such a T are those the view's lookups find (the first ones).

bench_decode.cpp measures decoding into structs (4-6x faster than
materialize().get<T>() on twitter, citm_catalog, and synthetic records).

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

2026-10-25 13:33:39 +01:00

..

call_std

Remove dead metaprogramming and duplicated code in traits and pointers (#5728)

2026-10-04 11:50:42 +02:00

cpp_future.hpp

Use standard library helpers where available, with C++11 fallbacks (#5876)

2026-10-21 20:14:59 +02:00

detected.hpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

identity_tag.hpp

📄 adjust year (#5044)

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is_sax.hpp

Remove dead metaprogramming and duplicated code in traits and pointers (#5728)

2026-10-04 11:50:42 +02:00

std_fs.hpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00

type_traits.hpp

json_view: from_json() of the macros reads views directly

2026-10-25 13:33:39 +01:00

void_t.hpp

📄 adjust year (#5044)

2026-01-01 20:00:39 +01:00