lix/src/libexpr/value-to-json.hh

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#pragma once
#include "nixexpr.hh"
#include "eval.hh"
#include <string>
#include <map>
namespace nix {
void printValueAsJSON(EvalState & state, bool strict,
Value & v, std::ostream & out, PathSet & context);
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void escapeJSON(std::ostream & str, const string & s);
struct JSONObject
{
std::ostream & str;
bool first;
JSONObject(std::ostream & str) : str(str), first(true)
{
str << "{";
}
~JSONObject()
{
str << "}";
}
void attr(const string & s)
{
if (!first) str << ","; else first = false;
escapeJSON(str, s);
str << ":";
}
void attr(const string & s, const string & t)
{
attr(s);
escapeJSON(str, t);
}
void attr(const string & s, const char * t)
{
attr(s);
escapeJSON(str, t);
}
void attr(const string & s, bool b)
{
attr(s);
str << (b ? "true" : "false");
}
template<typename T>
void attr(const string & s, const T & n)
{
attr(s);
str << n;
}
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};
struct JSONList
{
std::ostream & str;
bool first;
JSONList(std::ostream & str) : str(str), first(true)
{
str << "[";
}
~JSONList()
{
str << "]";
}
void elem()
{
if (!first) str << ","; else first = false;
}
void elem(const string & s)
{
elem();
escapeJSON(str, s);
}
};
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}