/* * Copyright 2009-2010 Cybozu Labs, Inc. * Copyright 2011-2014 Kazuho Oku * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef picojson_h #define picojson_h #include <algorithm> #include <cstdio> #include <cstdlib> #include <cstring> #include <cstddef> #include <iostream> #include <iterator> #include <limits> #include <map> #include <stdexcept> #include <string> #include <vector> // for isnan/isinf #if __cplusplus>=201103L # include <cmath> #else extern "C" { # ifdef _MSC_VER # include <float.h> # elif defined(__INTEL_COMPILER) # include <mathimf.h> # else # include <math.h> # endif } #endif #ifndef PICOJSON_USE_RVALUE_REFERENCE # if (defined(__cpp_rvalue_references) && __cpp_rvalue_references >= 200610) || (defined(_MSC_VER) && _MSC_VER >= 1600) # define PICOJSON_USE_RVALUE_REFERENCE 1 # else # define PICOJSON_USE_RVALUE_REFERENCE 0 # endif #endif//PICOJSON_USE_RVALUE_REFERENCE // experimental support for int64_t (see README.mkdn for detail) #ifdef PICOJSON_USE_INT64 # define __STDC_FORMAT_MACROS # include <errno.h> # include <inttypes.h> #endif // to disable the use of localeconv(3), set PICOJSON_USE_LOCALE to 0 #ifndef PICOJSON_USE_LOCALE # define PICOJSON_USE_LOCALE 1 #endif #if PICOJSON_USE_LOCALE extern "C" { # include <locale.h> } #endif #ifndef PICOJSON_ASSERT # define PICOJSON_ASSERT(e) do { if (! (e)) throw std::runtime_error(#e); } while (0) #endif #ifdef _MSC_VER #define SNPRINTF _snprintf_s #pragma warning(push) #pragma warning(disable : 4244) // conversion from int to char #pragma warning(disable : 4127) // conditional expression is constant #pragma warning(disable : 4702) // unreachable code #else #define SNPRINTF snprintf #endif namespace picojson { enum { null_type, boolean_type, number_type, string_type, array_type, object_type #ifdef PICOJSON_USE_INT64 , int64_type #endif }; enum { INDENT_WIDTH = 2 }; struct null {}; class value { public: typedef std::vector<value> array; typedef std::map<std::string, value> object; union _storage { bool boolean_; double number_; #ifdef PICOJSON_USE_INT64 int64_t int64_; #endif std::string* string_; array* array_; object* object_; }; protected: int type_; _storage u_; public: value(); value(int type, bool); explicit value(bool b); #ifdef PICOJSON_USE_INT64 explicit value(int64_t i); #endif explicit value(double n); explicit value(const std::string& s); explicit value(const array& a); explicit value(const object& o); explicit value(const char* s); value(const char* s, size_t len); ~value(); value(const value& x); value& operator=(const value& x); #if PICOJSON_USE_RVALUE_REFERENCE value(value&& x)throw(); value& operator=(value&& x)throw(); #endif void swap(value& x)throw(); template <typename T> bool is() const; template <typename T> const T& get() const; template <typename T> T& get(); bool evaluate_as_boolean() const; const value& get(size_t idx) const; const value& get(const std::string& key) const; value& get(size_t idx); value& get(const std::string& key); bool contains(size_t idx) const; bool contains(const std::string& key) const; std::string to_str() const; template <typename Iter> void serialize(Iter os, bool prettify = false) const; std::string serialize(bool prettify = false) const; private: template <typename T> value(const T*); // intentionally defined to block implicit conversion of pointer to bool template <typename Iter> static void _indent(Iter os, int indent); template <typename Iter> void _serialize(Iter os, int indent) const; std::string _serialize(int indent) const; }; typedef value::array array; typedef value::object object; inline value::value() : type_(null_type) {} inline value::value(int type, bool) : type_(type) { switch (type) { #define INIT(p, v) case p##type: u_.p = v; break INIT(boolean_, false); INIT(number_, 0.0); #ifdef PICOJSON_USE_INT64 INIT(int64_, 0); #endif INIT(string_, new std::string()); INIT(array_, new array()); INIT(object_, new object()); #undef INIT default: break; } } inline value::value(bool b) : type_(boolean_type) { u_.boolean_ = b; } #ifdef PICOJSON_USE_INT64 inline value::value(int64_t i) : type_(int64_type) { u_.int64_ = i; } #endif inline value::value(double n) : type_(number_type) { if ( #ifdef _MSC_VER ! _finite(n) #elif __cplusplus>=201103L || !(defined(isnan) && defined(isinf)) std::isnan(n) || std::isinf(n) #else isnan(n) || isinf(n) #endif ) { // throw std::overflow_error(""); PICOJSON_ASSERT(false); } u_.number_ = n; } inline value::value(const std::string& s) : type_(string_type) { u_.string_ = new std::string(s); } inline value::value(const array& a) : type_(array_type) { u_.array_ = new array(a); } inline value::value(const object& o) : type_(object_type) { u_.object_ = new object(o); } inline value::value(const char* s) : type_(string_type) { u_.string_ = new std::string(s); } inline value::value(const char* s, size_t len) : type_(string_type) { u_.string_ = new std::string(s, len); } inline value::~value() { switch (type_) { #define DEINIT(p) case p##type: delete u_.p; break DEINIT(string_); DEINIT(array_); DEINIT(object_); #undef DEINIT default: break; } } inline value::value(const value& x) : type_(x.type_) { switch (type_) { #define INIT(p, v) case p##type: u_.p = v; break INIT(string_, new std::string(*x.u_.string_)); INIT(array_, new array(*x.u_.array_)); INIT(object_, new object(*x.u_.object_)); #undef INIT default: u_ = x.u_; break; } } inline value& value::operator=(const value& x) { if (this != &x) { value t(x); swap(t); } return *this; } #if PICOJSON_USE_RVALUE_REFERENCE inline value::value(value&& x)throw() : type_(null_type) { swap(x); } inline value& value::operator=(value&& x)throw() { swap(x); return *this; } #endif inline void value::swap(value& x)throw() { std::swap(type_, x.type_); std::swap(u_, x.u_); } #define IS(ctype, jtype) \ template <> inline bool value::is<ctype>() const { \ return type_ == jtype##_type; \ } IS(null, null) IS(bool, boolean) #ifdef PICOJSON_USE_INT64 IS(int64_t, int64) #endif IS(std::string, string) IS(array, array) IS(object, object) #undef IS template <> inline bool value::is<double>() const { return type_ == number_type #ifdef PICOJSON_USE_INT64 || type_ == int64_type #endif ; } #define GET(ctype, var) \ template <> inline const ctype& value::get<ctype>() const { \ PICOJSON_ASSERT("type mismatch! call is<type>() before get<type>()" \ && is<ctype>()); \ return var; \ } \ template <> inline ctype& value::get<ctype>() { \ PICOJSON_ASSERT("type mismatch! call is<type>() before get<type>()" \ && is<ctype>()); \ return var; \ } GET(bool, u_.boolean_) GET(std::string, *u_.string_) GET(array, *u_.array_) GET(object, *u_.object_) #ifdef PICOJSON_USE_INT64 GET(double, (type_ == int64_type && (const_cast<value*>(this)->type_ = number_type, const_cast<value*>(this)->u_.number_ = u_.int64_), u_.number_)) GET(int64_t, u_.int64_) #else GET(double, u_.number_) #endif #undef GET inline bool value::evaluate_as_boolean() const { switch (type_) { case null_type: return false; case boolean_type: return u_.boolean_; case number_type: return u_.number_ != 0; #ifdef PICOJSON_USE_INT64 case int64_type: return u_.int64_ != 0; #endif case string_type: return ! u_.string_->empty(); default: return true; } } inline const value& value::get(size_t idx) const { static value s_null; PICOJSON_ASSERT(is<array>()); return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null; } inline value& value::get(size_t idx) { static value s_null; PICOJSON_ASSERT(is<array>()); return idx < u_.array_->size() ? (*u_.array_)[idx] : s_null; } inline const value& value::get(const std::string& key) const { static value s_null; PICOJSON_ASSERT(is<object>()); object::const_iterator i = u_.object_->find(key); return i != u_.object_->end() ? i->second : s_null; } inline value& value::get(const std::string& key) { static value s_null; PICOJSON_ASSERT(is<object>()); object::iterator i = u_.object_->find(key); return i != u_.object_->end() ? i->second : s_null; } inline bool value::contains(size_t idx) const { PICOJSON_ASSERT(is<array>()); return idx < u_.array_->size(); } inline bool value::contains(const std::string& key) const { PICOJSON_ASSERT(is<object>()); object::const_iterator i = u_.object_->find(key); return i != u_.object_->end(); } inline std::string value::to_str() const { switch (type_) { case null_type: return "null"; case boolean_type: return u_.boolean_ ? "true" : "false"; #ifdef PICOJSON_USE_INT64 case int64_type: { char buf[sizeof("-9223372036854775808")]; SNPRINTF(buf, sizeof(buf), "%" PRId64, u_.int64_); return buf; } #endif case number_type: { char buf[256]; double tmp; SNPRINTF(buf, sizeof(buf), fabs(u_.number_) < (1ULL << 53) && modf(u_.number_, &tmp) == 0 ? "%.f" : "%.17g", u_.number_); #if PICOJSON_USE_LOCALE char *decimal_point = localeconv()->decimal_point; if (strcmp(decimal_point, ".") != 0) { size_t decimal_point_len = strlen(decimal_point); for (char *p = buf; *p != '\0'; ++p) { if (strncmp(p, decimal_point, decimal_point_len) == 0) { return std::string(buf, p) + "." + (p + decimal_point_len); } } } #endif return buf; } case string_type: return *u_.string_; case array_type: return "array"; case object_type: return "object"; default: PICOJSON_ASSERT(0); #ifdef _MSC_VER __assume(0); #endif } return std::string(); } template <typename Iter> void copy(const std::string& s, Iter oi) { std::copy(s.begin(), s.end(), oi); } template <typename Iter> void serialize_str(const std::string& s, Iter oi) { *oi++ = '"'; for (std::string::const_iterator i = s.begin(); i != s.end(); ++i) { switch (*i) { #define MAP(val, sym) case val: copy(sym, oi); break MAP('"', "\\\""); MAP('\\', "\\\\"); MAP('/', "\\/"); MAP('\b', "\\b"); MAP('\f', "\\f"); MAP('\n', "\\n"); MAP('\r', "\\r"); MAP('\t', "\\t"); #undef MAP default: if (static_cast<unsigned char>(*i) < 0x20 || *i == 0x7f) { char buf[7]; SNPRINTF(buf, sizeof(buf), "\\u%04x", *i & 0xff); copy(buf, buf + 6, oi); } else { *oi++ = *i; } break; } } *oi++ = '"'; } template <typename Iter> void value::serialize(Iter oi, bool prettify) const { return _serialize(oi, prettify ? 0 : -1); } inline std::string value::serialize(bool prettify) const { return _serialize(prettify ? 0 : -1); } template <typename Iter> void value::_indent(Iter oi, int indent) { *oi++ = '\n'; for (int i = 0; i < indent * INDENT_WIDTH; ++i) { *oi++ = ' '; } } template <typename Iter> void value::_serialize(Iter oi, int indent) const { switch (type_) { case string_type: serialize_str(*u_.string_, oi); break; case array_type: { *oi++ = '['; if (indent != -1) { ++indent; } for (array::const_iterator i = u_.array_->begin(); i != u_.array_->end(); ++i) { if (i != u_.array_->begin()) { *oi++ = ','; } if (indent != -1) { _indent(oi, indent); } i->_serialize(oi, indent); } if (indent != -1) { --indent; if (! u_.array_->empty()) { _indent(oi, indent); } } *oi++ = ']'; break; } case object_type: { *oi++ = '{'; if (indent != -1) { ++indent; } for (object::const_iterator i = u_.object_->begin(); i != u_.object_->end(); ++i) { if (i != u_.object_->begin()) { *oi++ = ','; } if (indent != -1) { _indent(oi, indent); } serialize_str(i->first, oi); *oi++ = ':'; if (indent != -1) { *oi++ = ' '; } i->second._serialize(oi, indent); } if (indent != -1) { --indent; if (! u_.object_->empty()) { _indent(oi, indent); } } *oi++ = '}'; break; } default: copy(to_str(), oi); break; } if (indent == 0) { *oi++ = '\n'; } } inline std::string value::_serialize(int indent) const { std::string s; _serialize(std::back_inserter(s), indent); return s; } template <typename Iter> class input { protected: Iter cur_, end_; int last_ch_; bool ungot_; int line_; public: input(const Iter& first, const Iter& last) : cur_(first), end_(last), last_ch_(-1), ungot_(false), line_(1) {} int getc() { if (ungot_) { ungot_ = false; return last_ch_; } if (cur_ == end_) { last_ch_ = -1; return -1; } if (last_ch_ == '\n') { line_++; } last_ch_ = *cur_ & 0xff; ++cur_; return last_ch_; } void ungetc() { if (last_ch_ != -1) { PICOJSON_ASSERT(! ungot_); ungot_ = true; } } Iter cur() const { return cur_; } int line() const { return line_; } void skip_ws() { while (1) { int ch = getc(); if (! (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r')) { ungetc(); break; } } } bool expect(int expect) { skip_ws(); if (getc() != expect) { ungetc(); return false; } return true; } bool match(const std::string& pattern) { for (std::string::const_iterator pi(pattern.begin()); pi != pattern.end(); ++pi) { if (getc() != *pi) { ungetc(); return false; } } return true; } }; template<typename Iter> inline int _parse_quadhex(input<Iter> &in) { int uni_ch = 0, hex; for (int i = 0; i < 4; i++) { if ((hex = in.getc()) == -1) { return -1; } if ('0' <= hex && hex <= '9') { hex -= '0'; } else if ('A' <= hex && hex <= 'F') { hex -= 'A' - 0xa; } else if ('a' <= hex && hex <= 'f') { hex -= 'a' - 0xa; } else { in.ungetc(); return -1; } uni_ch = uni_ch * 16 + hex; } return uni_ch; } template<typename String, typename Iter> inline bool _parse_codepoint(String& out, input<Iter>& in) { int uni_ch; if ((uni_ch = _parse_quadhex(in)) == -1) { return false; } if (0xd800 <= uni_ch && uni_ch <= 0xdfff) { if (0xdc00 <= uni_ch) { // a second 16-bit of a surrogate pair appeared return false; } // first 16-bit of surrogate pair, get the next one if (in.getc() != '\\' || in.getc() != 'u') { in.ungetc(); return false; } int second = _parse_quadhex(in); if (! (0xdc00 <= second && second <= 0xdfff)) { return false; } uni_ch = ((uni_ch - 0xd800) << 10) | ((second - 0xdc00) & 0x3ff); uni_ch += 0x10000; } if (uni_ch < 0x80) { out.push_back(uni_ch); } else { if (uni_ch < 0x800) { out.push_back(0xc0 | (uni_ch >> 6)); } else { if (uni_ch < 0x10000) { out.push_back(0xe0 | (uni_ch >> 12)); } else { out.push_back(0xf0 | (uni_ch >> 18)); out.push_back(0x80 | ((uni_ch >> 12) & 0x3f)); } out.push_back(0x80 | ((uni_ch >> 6) & 0x3f)); } out.push_back(0x80 | (uni_ch & 0x3f)); } return true; } template<typename String, typename Iter> inline bool _parse_string(String& out, input<Iter>& in) { while (1) { int ch = in.getc(); if (ch < ' ') { in.ungetc(); return false; } else if (ch == '"') { return true; } else if (ch == '\\') { if ((ch = in.getc()) == -1) { return false; } switch (ch) { #define MAP(sym, val) case sym: out.push_back(val); break MAP('"', '\"'); MAP('\\', '\\'); MAP('/', '/'); MAP('b', '\b'); MAP('f', '\f'); MAP('n', '\n'); MAP('r', '\r'); MAP('t', '\t'); #undef MAP case 'u': if (! _parse_codepoint(out, in)) { return false; } break; default: return false; } } else { out.push_back(ch); } } return false; } template <typename Context, typename Iter> inline bool _parse_array(Context& ctx, input<Iter>& in) { if (! ctx.parse_array_start()) { return false; } size_t idx = 0; if (in.expect(']')) { return ctx.parse_array_stop(idx); } do { if (! ctx.parse_array_item(in, idx)) { return false; } idx++; } while (in.expect(',')); return in.expect(']') && ctx.parse_array_stop(idx); } template <typename Context, typename Iter> inline bool _parse_object(Context& ctx, input<Iter>& in) { if (! ctx.parse_object_start()) { return false; } if (in.expect('}')) { return true; } do { std::string key; if (! in.expect('"') || ! _parse_string(key, in) || ! in.expect(':')) { return false; } if (! ctx.parse_object_item(in, key)) { return false; } } while (in.expect(',')); return in.expect('}'); } template <typename Iter> inline std::string _parse_number(input<Iter>& in) { std::string num_str; while (1) { int ch = in.getc(); if (('0' <= ch && ch <= '9') || ch == '+' || ch == '-' || ch == 'e' || ch == 'E') { num_str.push_back(ch); } else if (ch == '.') { #if PICOJSON_USE_LOCALE num_str += localeconv()->decimal_point; #else num_str.push_back('.'); #endif } else { in.ungetc(); break; } } return num_str; } template <typename Context, typename Iter> inline bool _parse(Context& ctx, input<Iter>& in) { in.skip_ws(); int ch = in.getc(); switch (ch) { #define IS(ch, text, op) case ch: \ if (in.match(text) && op) { \ return true; \ } else { \ return false; \ } IS('n', "ull", ctx.set_null()); IS('f', "alse", ctx.set_bool(false)); IS('t', "rue", ctx.set_bool(true)); #undef IS case '"': return ctx.parse_string(in); case '[': return _parse_array(ctx, in); case '{': return _parse_object(ctx, in); default: if (('0' <= ch && ch <= '9') || ch == '-') { double f; char *endp; in.ungetc(); std::string num_str = _parse_number(in); if (num_str.empty()) { return false; } #ifdef PICOJSON_USE_INT64 { errno = 0; intmax_t ival = strtoimax(num_str.c_str(), &endp, 10); if (errno == 0 && std::numeric_limits<int64_t>::min() <= ival && ival <= std::numeric_limits<int64_t>::max() && endp == num_str.c_str() + num_str.size()) { ctx.set_int64(ival); return true; } } #endif f = strtod(num_str.c_str(), &endp); if (endp == num_str.c_str() + num_str.size()) { ctx.set_number(f); return true; } return false; } break; } in.ungetc(); return false; } class deny_parse_context { public: bool set_null() { return false; } bool set_bool(bool) { return false; } #ifdef PICOJSON_USE_INT64 bool set_int64(int64_t) { return false; } #endif bool set_number(double) { return false; } template <typename Iter> bool parse_string(input<Iter>&) { return false; } bool parse_array_start() { return false; } template <typename Iter> bool parse_array_item(input<Iter>&, size_t) { return false; } bool parse_array_stop(size_t) { return false; } bool parse_object_start() { return false; } template <typename Iter> bool parse_object_item(input<Iter>&, const std::string&) { return false; } }; class default_parse_context { protected: value* out_; public: default_parse_context(value* out) : out_(out) {} bool set_null() { *out_ = value(); return true; } bool set_bool(bool b) { *out_ = value(b); return true; } #ifdef PICOJSON_USE_INT64 bool set_int64(int64_t i) { *out_ = value(i); return true; } #endif bool set_number(double f) { *out_ = value(f); return true; } template<typename Iter> bool parse_string(input<Iter>& in) { *out_ = value(string_type, false); return _parse_string(out_->get<std::string>(), in); } bool parse_array_start() { *out_ = value(array_type, false); return true; } template <typename Iter> bool parse_array_item(input<Iter>& in, size_t) { array& a = out_->get<array>(); a.push_back(value()); default_parse_context ctx(&a.back()); return _parse(ctx, in); } bool parse_array_stop(size_t) { return true; } bool parse_object_start() { *out_ = value(object_type, false); return true; } template <typename Iter> bool parse_object_item(input<Iter>& in, const std::string& key) { object& o = out_->get<object>(); default_parse_context ctx(&o[key]); return _parse(ctx, in); } private: default_parse_context(const default_parse_context&); default_parse_context& operator=(const default_parse_context&); }; class null_parse_context { public: struct dummy_str { void push_back(int) {} }; public: null_parse_context() {} bool set_null() { return true; } bool set_bool(bool) { return true; } #ifdef PICOJSON_USE_INT64 bool set_int64(int64_t) { return true; } #endif bool set_number(double) { return true; } template <typename Iter> bool parse_string(input<Iter>& in) { dummy_str s; return _parse_string(s, in); } bool parse_array_start() { return true; } template <typename Iter> bool parse_array_item(input<Iter>& in, size_t) { return _parse(*this, in); } bool parse_array_stop(size_t) { return true; } bool parse_object_start() { return true; } template <typename Iter> bool parse_object_item(input<Iter>& in, const std::string&) { return _parse(*this, in); } private: null_parse_context(const null_parse_context&); null_parse_context& operator=(const null_parse_context&); }; // obsolete, use the version below template <typename Iter> inline std::string parse(value& out, Iter& pos, const Iter& last) { std::string err; pos = parse(out, pos, last, &err); return err; } template <typename Context, typename Iter> inline Iter _parse(Context& ctx, const Iter& first, const Iter& last, std::string* err) { input<Iter> in(first, last); if (! _parse(ctx, in) && err != NULL) { char buf[64]; SNPRINTF(buf, sizeof(buf), "syntax error at line %d near: ", in.line()); *err = buf; while (1) { int ch = in.getc(); if (ch == -1 || ch == '\n') { break; } else if (ch >= ' ') { err->push_back(ch); } } } return in.cur(); } template <typename Iter> inline Iter parse(value& out, const Iter& first, const Iter& last, std::string* err) { default_parse_context ctx(&out); return _parse(ctx, first, last, err); } inline std::string parse(value& out, const std::string& s) { std::string err; parse(out, s.begin(), s.end(), &err); return err; } inline std::string parse(value& out, std::istream& is) { std::string err; parse(out, std::istreambuf_iterator<char>(is.rdbuf()), std::istreambuf_iterator<char>(), &err); return err; } template <typename T> struct last_error_t { static std::string s; }; template <typename T> std::string last_error_t<T>::s; inline void set_last_error(const std::string& s) { last_error_t<bool>::s = s; } inline const std::string& get_last_error() { return last_error_t<bool>::s; } inline bool operator==(const value& x, const value& y) { if (x.is<null>()) return y.is<null>(); #define PICOJSON_CMP(type) \ if (x.is<type>()) \ return y.is<type>() && x.get<type>() == y.get<type>() PICOJSON_CMP(bool); PICOJSON_CMP(double); PICOJSON_CMP(std::string); PICOJSON_CMP(array); PICOJSON_CMP(object); #undef PICOJSON_CMP PICOJSON_ASSERT(0); #ifdef _MSC_VER __assume(0); #endif return false; } inline bool operator!=(const value& x, const value& y) { return ! (x == y); } } #if !PICOJSON_USE_RVALUE_REFERENCE namespace std { template<> inline void swap(picojson::value& x, picojson::value& y) { x.swap(y); } } #endif inline std::istream& operator>>(std::istream& is, picojson::value& x) { picojson::set_last_error(std::string()); std::string err = picojson::parse(x, is); if (! err.empty()) { picojson::set_last_error(err); is.setstate(std::ios::failbit); } return is; } inline std::ostream& operator<<(std::ostream& os, const picojson::value& x) { x.serialize(std::ostream_iterator<char>(os)); return os; } #ifdef _MSC_VER #pragma warning(pop) #endif #endif