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Use words for packed constants

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This commit is contained in:
Orivej Desh 2019-10-12 03:34:56 +00:00 committed by Victor Zverovich
parent dd11d45847
commit a927dda9bb
1 changed files with 8 additions and 4 deletions
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12
include/fmt/core.h
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@ -889,7 +889,11 @@ using mapped_type_constant =
typename Context::char_type>;
// Maximum number of arguments with packed types.
enum { max_packed_args = 12 };
enum {
packed_arg_bitsize = 5,
packed_arg_mask = (1 << packed_arg_bitsize) - 1,
max_packed_args = 63 / packed_arg_bitsize,
};
enum : unsigned long long { is_unpacked_bit = 1ull << 63 };
template <typename Context> class arg_map;
@ -1052,7 +1056,7 @@ template <typename> constexpr unsigned long long encode_types() { return 0; }
template <typename Context, typename Arg, typename... Args>
constexpr unsigned long long encode_types() {
return mapped_type_constant<Arg, Context>::value |
(encode_types<Context, Args...>() << 5);
(encode_types<Context, Args...>() << packed_arg_bitsize);
}
template <typename Context, typename T>
@ -1197,8 +1201,8 @@ template <typename Context> class basic_format_args {
bool is_packed() const { return (types_ & internal::is_unpacked_bit) == 0; }
internal::type type(int index) const {
int shift = index * 5;
return static_cast<internal::type>((types_ >> shift) & 0x1f);
int shift = index * internal::packed_arg_bitsize;
return static_cast<internal::type>((types_ >> shift) & internal::packed_arg_mask);
}
friend class internal::arg_map<Context>;