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Test suite: smaller gaps and cleanups (untested macro configurations, std::formatter branches, patch_inplace, duplicate TEST_CASE name)

Status: Open.

#5423 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

Missing test coverage: lenient BSON input handling is documented but not pinned by tests

Status: Open.

#5422 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

Missing test coverage: ordered_json — binary formats, patch/diff, flatten/unflatten, and other non-default basic_json specializations

Status: Open.

#5421 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

Missing test coverage: diagnostic positions — value lifetime, input adapters, SAX, trailing commas

Status: Open.

#5420 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

Test suite: reduce compile time — 34 % is per-standard duplicate builds; large intra-file clones

Status: Open.

#5419 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

Test suite: reduce runtime — 52 % is Unicode byte sweeps, plus redundant re-parsing in binary roundtrip tests

Status: Open.

#5418 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

Test suite: unit-class_parser_diagnostic_positions.cpp has drifted from unit-class_parser.cpp — deduplicate via define-based recompilation

Status: Open.

#5417 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

Unicode tests: "ill-formed: wrong fourth byte" sections never execute anything (byte3/byte4 typo)

Status: Open.

#5416 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

dump() performs avoidable per-call heap allocations (eager 512-byte indent_string + shared_ptr output adapter) — ~17% overhead on the dump-many-small-values pattern

kind: enhancement/improvement

Status: Open.

#5413 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

Whitespace between tokens is skipped one byte at a time; bulk-skipping speeds up parse()/accept() on pretty-printed input (~25% of accept time)

kind: enhancement/improvement

Status: Open.

#5412 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

accept()/SAX validation fully converts every number (strtoull/strtoll/strtof) although only finiteness is needed — up to 2.8x slower than necessary on numeric input

kind: enhancement/improvement

Status: Open.

#5411 In nlohmann/json;

· nlohmann opened on Aug 26, 2026

Broaden nodiscard (JSON_HEDLEY_WARN_UNUSED_RESULT) coverage to pure query functions: dump, contains, empty, size, is_*, type, count, ...

kind: enhancement/improvement

Status: Open.

#5410 In nlohmann/json;

· nlohmann opened on Aug 26, 2026