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separated_buffer_t to accept strings by rvalue reference

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This saves a copy in some cases.
This commit is contained in:
ridiculousfish 2021-02-04 16:02:40 -08:00
parent 032467f338
commit d578f8d136
1 changed files with 9 additions and 3 deletions
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12
src/io.h
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@ -152,9 +152,15 @@ class separated_buffer_t {
}
/// Append a string \p str with the given separation type \p sep.
void append(const std::string &str, separation_type_t sep = separation_type_t::inferred) {
const char *cstr = str.c_str();
append(cstr, cstr + str.size(), sep);
void append(std::string &&str, separation_type_t sep = separation_type_t::inferred) {
if (!try_add_size(str.size())) return;
// Try merging with the last element.
if (sep == separation_type_t::inferred && !elements_.empty() &&
!elements_.back().is_explicitly_separated()) {
elements_.back().contents.append(str);
} else {
elements_.emplace_back(std::move(str), sep);
}
}
};