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Improve nix show-config --json

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In particular, show descriptions. This could be used for manpage
generation etc.
This commit is contained in:
Eelco Dolstra 2017-04-20 17:34:47 +02:00
parent 4410e9d995
commit efa4bdbfcd
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GPG key ID: 8170B4726D7198DE
6 changed files with 71 additions and 43 deletions
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49
src/libutil/json.cc
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@ -19,51 +19,34 @@ void toJSON(std::ostream & str, const char * start, const char * end)
str << '"';
}
void toJSON(std::ostream & str, const std::string & s)
{
toJSON(str, s.c_str(), s.c_str() + s.size());
}
void toJSON(std::ostream & str, const char * s)
{
if (!s) str << "null"; else toJSON(str, s, s + strlen(s));
}
void toJSON(std::ostream & str, unsigned long long n)
template<> void toJSON<int>(std::ostream & str, const int & n) { str << n; }
template<> void toJSON<unsigned int>(std::ostream & str, const unsigned int & n) { str << n; }
template<> void toJSON<long>(std::ostream & str, const long & n) { str << n; }
template<> void toJSON<unsigned long>(std::ostream & str, const unsigned long & n) { str << n; }
template<> void toJSON<long long>(std::ostream & str, const long long & n) { str << n; }
template<> void toJSON<unsigned long long>(std::ostream & str, const unsigned long long & n) { str << n; }
template<> void toJSON<float>(std::ostream & str, const float & n) { str << n; }
template<> void toJSON<std::string>(std::ostream & str, const std::string & s)
{
str << n;
toJSON(str, s.c_str(), s.c_str() + s.size());
}
void toJSON(std::ostream & str, unsigned long n)
{
str << n;
}
void toJSON(std::ostream & str, long n)
{
str << n;
}
void toJSON(std::ostream & str, unsigned int n)
{
str << n;
}
void toJSON(std::ostream & str, int n)
{
str << n;
}
void toJSON(std::ostream & str, double f)
{
str << f;
}
void toJSON(std::ostream & str, bool b)
template<> void toJSON<bool>(std::ostream & str, const bool & b)
{
str << (b ? "true" : "false");
}
template<> void toJSON<std::nullptr_t>(std::ostream & str, const std::nullptr_t & b)
{
str << "null";
}
JSONWriter::JSONWriter(std::ostream & str, bool indent)
: state(new JSONState(str, indent))
{