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Use std::array for the integer size class table

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clang-tidy (cppcoreguidelines-avoid-c-arrays) rejects the C-style array.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann committed 2026-10-14 19:34:12 +02:00
1 parent 5010011656
commit 3aa3d87983
2 files changed
+16 -12
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include/nlohmann/detail/output/binary_writer.hpp
+8 -6
View File
@@ -1897,15 +1897,17 @@ class binary_writer
*/ */
static unsigned integer_size_class(const std::uint64_t x) noexcept static unsigned integer_size_class(const std::uint64_t x) noexcept
{ {
static constexpr std::uint8_t size_class_by_leading_zeros[64] = static constexpr std::array<std::uint8_t, 64> size_class_by_leading_zeros =
{ {
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, {
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
1, 1, 1, 1, 1, 1, 1, 1 2, 2, 2, 2, 2, 2, 2, 2,
1, 1, 1, 1, 1, 1, 1, 1
}
}; };
// x | 1 keeps count_leading_zeros() away from 0 // x | 1 keeps count_leading_zeros() away from 0
return size_class_by_leading_zeros[count_leading_zeros(x | 1u)]; return size_class_by_leading_zeros[static_cast<std::size_t>(count_leading_zeros(x | 1u))];
} }
/*! /*!
single_include/nlohmann/json.hpp
Generated
+8 -6
View File
@@ -23929,15 +23929,17 @@ class binary_writer
*/ */
static unsigned integer_size_class(const std::uint64_t x) noexcept static unsigned integer_size_class(const std::uint64_t x) noexcept
{ {
static constexpr std::uint8_t size_class_by_leading_zeros[64] = static constexpr std::array<std::uint8_t, 64> size_class_by_leading_zeros =
{ {
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, {
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
1, 1, 1, 1, 1, 1, 1, 1 2, 2, 2, 2, 2, 2, 2, 2,
1, 1, 1, 1, 1, 1, 1, 1
}
}; };
// x | 1 keeps count_leading_zeros() away from 0 // x | 1 keeps count_leading_zeros() away from 0
return size_class_by_leading_zeros[count_leading_zeros(x | 1u)]; return size_class_by_leading_zeros[static_cast<std::size_t>(count_leading_zeros(x | 1u))];
} }
/*! /*!