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feat💥: format toml::string as TOML format

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ToruNiina 2019-06-29 20:19:47 +09:00
parent 9b12b17d5e
commit c2435b0d56
1 changed files with 67 additions and 2 deletions
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69
toml/string.hpp
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@ -139,9 +139,74 @@ operator>=(const char* lhs, const string& rhs) {return std::string(lhs) >= rhs.s
template<typename charT, typename traits>
std::basic_ostream<charT, traits>&
operator<<(std::basic_ostream<charT, traits>& os, const string& str)
operator<<(std::basic_ostream<charT, traits>& os, const string& s)
{
os << str.str;
if(s.kind == string_t::basic)
{
if(std::find(s.str.cbegin(), s.str.cend(), '\n') != s.str.cend())
{
// it contains newline. make it multiline string.
os << "\"\"\"\n";
for(auto i=s.str.cbegin(), e=s.str.cend(); i!=e; ++i)
{
switch(*i)
{
case '\\': {os << "\\\\"; break;}
case '\"': {os << "\\\""; break;}
case '\b': {os << "\\b"; break;}
case '\t': {os << "\\t"; break;}
case '\f': {os << "\\f"; break;}
case '\n': {os << '\n'; break;}
case '\r':
{
// since it is a multiline string,
// CRLF is not needed to be escaped.
if(std::next(i) != e && *std::next(i) == '\n')
{
os << "\r\n";
++i;
}
else
{
os << "\\r";
}
break;
}
default: {os << *i; break;}
}
}
os << "\\\n\"\"\"";
return os;
}
// no newline. make it inline.
os << "\"";
for(const auto c : s.str)
{
switch(c)
{
case '\\': {os << "\\\\"; break;}
case '\"': {os << "\\\""; break;}
case '\b': {os << "\\b"; break;}
case '\t': {os << "\\t"; break;}
case '\f': {os << "\\f"; break;}
case '\n': {os << "\\n"; break;}
case '\r': {os << "\\r"; break;}
default : {os << c; break;}
}
}
os << "\"";
return os;
}
// the string `s` is literal-string.
if(std::find(s.str.cbegin(), s.str.cend(), '\n') != s.str.cend() ||
std::find(s.str.cbegin(), s.str.cend(), '\'') != s.str.cend() )
{
// contains newline or single quote. make it multiline.
os << "'''\n" << s.str << "'''";
return os;
}
// normal literal string
os << '\'' << s.str << '\'';
return os;
}