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2.5.7: force-inline detail::parse_array_index (#5891)

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Moving parse_array_index out of json_pointer stopped clang from inlining it
into the pointer resolution (JsonPointerAt/citm_catalog +17%,
JsonPointerAt/twitter +8%); JSON_HEDLEY_ALWAYS_INLINE restores the baseline.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
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Niels Lohmann committed 2026-10-23 12:07:53 +02:00
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commit fce5a54722
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include/nlohmann/detail/json_pointer.hpp
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@@ -70,9 +70,11 @@ enum class array_index_status
@note this function never throws; json_pointer::array_index(), the callers that @note this function never throws; json_pointer::array_index(), the callers that
must not throw, and the json_view pointer resolution build on it instead must not throw, and the json_view pointer resolution build on it instead
of each re-implementing the RFC 6901 digit rules and the range check of each re-implementing the RFC 6901 digit rules and the range check
@note force-inlined: as a free function template it is no longer inlined into
the pointer resolution, which makes JsonPointerAt up to 17% slower (#5891)
*/ */
template<typename SizeType, typename StringType> template<typename SizeType, typename StringType>
array_index_status parse_array_index(const StringType& s, SizeType& idx) noexcept JSON_HEDLEY_ALWAYS_INLINE array_index_status parse_array_index(const StringType& s, SizeType& idx) noexcept
{ {
// error condition (cf. RFC 6901, Sect. 4) // error condition (cf. RFC 6901, Sect. 4)
if (JSON_HEDLEY_UNLIKELY(s.size() > 1 && s[0] == '0')) if (JSON_HEDLEY_UNLIKELY(s.size() > 1 && s[0] == '0'))