Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

make format_int constexpr #4032

Merged
merged 4 commits into from
Jun 23, 2024
Merged

make format_int constexpr #4032

Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
9e2efbf
make format_int constexpr
dixlorenz Jun 21, 2024
92a9bd3
format_int can only be constexpr in C++20
dixlorenz Jun 21, 2024
17918c6
apply clang-format
dixlorenz Jun 22, 2024
d4fe2e6
drop constexpr for str()
dixlorenz Jun 22, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
28 changes: 17 additions & 11 deletions include/fmt/format.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3918,12 +3918,14 @@ class format_int {
mutable char buffer_[buffer_size];
char* str_;

template <typename UInt> auto format_unsigned(UInt value) -> char* {
template <typename UInt>
FMT_CONSTEXPR20 auto format_unsigned(UInt value) -> char* {
auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
return detail::format_decimal(buffer_, n, buffer_size - 1).begin;
}

template <typename Int> auto format_signed(Int value) -> char* {
template <typename Int>
FMT_CONSTEXPR20 auto format_signed(Int value) -> char* {
auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
bool negative = value < 0;
if (negative) abs_value = 0 - abs_value;
Expand All @@ -3933,26 +3935,30 @@ class format_int {
}

public:
explicit format_int(int value) : str_(format_signed(value)) {}
explicit format_int(long value) : str_(format_signed(value)) {}
explicit format_int(long long value) : str_(format_signed(value)) {}
explicit format_int(unsigned value) : str_(format_unsigned(value)) {}
explicit format_int(unsigned long value) : str_(format_unsigned(value)) {}
explicit format_int(unsigned long long value)
explicit FMT_CONSTEXPR20 format_int(int value) : str_(format_signed(value)) {}
explicit FMT_CONSTEXPR20 format_int(long value)
: str_(format_signed(value)) {}
explicit FMT_CONSTEXPR20 format_int(long long value)
: str_(format_signed(value)) {}
explicit FMT_CONSTEXPR20 format_int(unsigned value)
: str_(format_unsigned(value)) {}
explicit FMT_CONSTEXPR20 format_int(unsigned long value)
: str_(format_unsigned(value)) {}
explicit FMT_CONSTEXPR20 format_int(unsigned long long value)
: str_(format_unsigned(value)) {}

/// Returns the number of characters written to the output buffer.
auto size() const -> size_t {
FMT_CONSTEXPR20 auto size() const -> size_t {
return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
}

/// Returns a pointer to the output buffer content. No terminating null
/// character is appended.
auto data() const -> const char* { return str_; }
FMT_CONSTEXPR20 auto data() const -> const char* { return str_; }

/// Returns a pointer to the output buffer content with terminating null
/// character appended.
auto c_str() const -> const char* {
FMT_CONSTEXPR20 auto c_str() const -> const char* {
buffer_[buffer_size - 1] = '\0';
return str_;
}
Expand Down