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string utils: add concat

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Change-Id: I3b0fd2a34289545dbf06b85c2e825fbf87bb42ad
This commit is contained in:
Adrien Béraud
2021-10-03 21:05:12 -04:00
parent 32b777f987
commit c9fa6304d5
1 changed files with 52 additions and 51 deletions
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103
src/string_utils.h
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@ -32,57 +32,6 @@
#include <WTypes.h>
#endif
// Add string operators crucially missing from standard
// see https://groups.google.com/a/isocpp.org/forum/#!topic/std-proposals/1RcShRhrmRc
namespace std {
inline string
operator+(const string& s, const string_view& sv)
{
string ret;
ret.reserve(s.size() + sv.size());
ret.append(s);
ret.append(sv);
return ret;
}
inline string
operator+(const string_view& sv, const string& s)
{
string ret;
ret.reserve(s.size() + sv.size());
ret.append(sv);
ret.append(s);
return ret;
}
using svmatch = match_results<string_view::const_iterator>;
using svsub_match = sub_match<string_view::const_iterator>;
constexpr string_view svsub_match_view(const svsub_match& submatch) noexcept {
return string_view(&*submatch.first, submatch.second - submatch.first);
}
inline bool
regex_match(string_view sv,
svmatch& m,
const regex& e,
regex_constants::match_flag_type flags = regex_constants::match_default)
{
return regex_match(sv.begin(), sv.end(), m, e, flags);
}
inline bool
regex_match(string_view sv,
const regex& e,
regex_constants::match_flag_type flags = regex_constants::match_default)
{
return regex_match(sv.begin(), sv.end(), e, flags);
}
inline bool
regex_search(string_view sv,
svmatch& m,
const regex& e,
regex_constants::match_flag_type flags = regex_constants::match_default)
{
return regex_search(sv.begin(), sv.end(), m, e, flags);
}
} // namespace std
namespace jami {
constexpr static const char TRUE_STR[] = "true";
@ -116,6 +65,15 @@ stod(const std::string& str)
return std::stod(str);
}
template<typename... Args>
std::string concat(Args &&... args){
static_assert((std::is_constructible_v<std::string_view, Args&&> && ...));
std::string s;
s.reserve((std::string_view{ args }.size() + ...));
(s.append(std::forward<Args>(args)), ...);
return s;
}
std::string_view trim(std::string_view s);
/**
@ -188,3 +146,46 @@ std::string string_join(const std::set<std::string>& set, std::string_view separ
std::set<std::string> string_split_set(std::string& str, std::string_view separator = "/");
} // namespace jami
// Add string operators crucially missing from standard
// see https://groups.google.com/a/isocpp.org/forum/#!topic/std-proposals/1RcShRhrmRc
namespace std {
inline string
operator+(const string& s, const string_view& sv)
{
return jami::concat(s, sv);
}
inline string
operator+(const string_view& sv, const string& s)
{
return jami::concat(sv, s);
}
using svmatch = match_results<string_view::const_iterator>;
using svsub_match = sub_match<string_view::const_iterator>;
constexpr string_view svsub_match_view(const svsub_match& submatch) noexcept {
return string_view(&*submatch.first, submatch.second - submatch.first);
}
inline bool
regex_match(string_view sv,
svmatch& m,
const regex& e,
regex_constants::match_flag_type flags = regex_constants::match_default)
{
return regex_match(sv.begin(), sv.end(), m, e, flags);
}
inline bool
regex_match(string_view sv,
const regex& e,
regex_constants::match_flag_type flags = regex_constants::match_default)
{
return regex_match(sv.begin(), sv.end(), e, flags);
}
inline bool
regex_search(string_view sv,
svmatch& m,
const regex& e,
regex_constants::match_flag_type flags = regex_constants::match_default)
{
return regex_search(sv.begin(), sv.end(), m, e, flags);
}
} // namespace std