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Improve code_point_length codegen on older gcc

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This commit is contained in:
Victor Zverovich 2021-09-07 19:34:13 -07:00
parent aeee70a815
commit a58c133821
1 changed files with 3 additions and 3 deletions
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4
include/fmt/core.h
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@ -2140,8 +2140,8 @@ constexpr auto to_ascii(Char value) ->
template <typename Char>
FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int {
if (const_check(sizeof(Char) != 1)) return 1;
constexpr char lengths[] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2, 3, 3, 4, 0};
auto lengths =
"\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\0\0\0\0\0\0\0\0\2\2\2\2\3\3\4";
int len = lengths[static_cast<unsigned char>(*begin) >> 3];
// Compute the pointer to the next character early so that the next