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Minor fixes.

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This commit is contained in:
vsol 2020-05-07 21:46:52 +03:00
parent d2a2c525e6
commit 5f6f93b7e5
1 changed files with 8 additions and 35 deletions
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43
include/fmt/core.h
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@ -1454,33 +1454,6 @@ struct named_arg : view, named_arg_base<Char> {
: named_arg_base<Char>(name), value(val) {}
};
// scope_exit is proposed in TS v3. This implementation is slightly different
// because without deduction guide there's no easy way to construct from lambda.
// Factory template function is needed (see make_scope_exit).
// Move assignment is disabled because of unclear semantic: whether to call
// currently assigned functor or not...
template <typename F> class scope_exit {
bool passive_{false};
F func_;
public:
explicit scope_exit(F&& f) noexcept : func_(std::forward<F>(f)) {}
~scope_exit() {
if (!passive_) func_();
}
scope_exit(const F&) = delete;
scope_exit(scope_exit&& rhs) noexcept : func_{std::move(rhs.func_)} {
rhs.release();
}
const scope_exit& operator=(const scope_exit&) = delete;
const scope_exit& operator=(scope_exit&&) = delete;
void release() noexcept { passive_ = true; }
};
template <typename F> scope_exit<F> make_scope_exit(F&& f) {
return scope_exit<F>{std::forward<F>(f)};
}
} // namespace internal
/**
@ -1565,16 +1538,16 @@ class dynamic_format_arg_store
template <typename T>
void emplace_arg(const internal::named_arg<T, char_type>& arg) {
if (named_info_.empty()) {
data_.insert(
data_.begin(),
{static_cast<const internal::named_arg_info<char_type>*>(nullptr),
0});
constexpr const internal::named_arg_info<char_type>* zero_ptr{nullptr};
data_.insert(data_.begin(), {zero_ptr, 0});
}
data_.emplace_back(internal::make_arg<Context>(
static_cast<const internal::unwrap_reference_t<T>&>(arg.value)));
auto guard =
internal::make_scope_exit([this]() { this->data_.pop_back(); });
auto pop_one = [](std::vector<basic_format_arg<Context>>* data) {
data->pop_back();
};
std::unique_ptr<std::vector<basic_format_arg<Context>>, decltype(pop_one)>
guard{&data_, pop_one};
named_info_.push_back({arg.name, static_cast<int>(data_.size() - 2u)});
data_[0].value_.named_args = {named_info_.data(), named_info_.size()};
guard.release();
@ -1631,7 +1604,7 @@ class dynamic_format_arg_store
*/
template <typename T> void push_back(std::reference_wrapper<T> arg) {
static_assert(
internal::is_named_arg<typename std::decay<T>::type>::value ||
internal::is_named_arg<typename std::remove_cv<T>::type>::value ||
need_copy<T>::value,
"objects of built-in types and string views are always copied");
emplace_arg(arg.get());