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template< template< typename U, typename V, typename...Args > class ObjectType = std::map, template< typename U, typename...Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = int64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator> < / div >
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template< class CompatibleObjectType , typename std::enable_if< std::is_constructible< typename object_t::key_type, typename CompatibleObjectType::key_type > ::value andstd::is_constructible< basic_json, typename CompatibleObjectType::mapped_type > ::value, int > ::type = 0> < / div >
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< td class = "memname" > < a class = "el" href = "classnlohmann_1_1basic__json.html" > nlohmann::basic_json< / a > ::< a class = "el" href = "classnlohmann_1_1basic__json.html" > basic_json< / a > < / td >
< td > (< / td >
< td class = "paramtype" > const CompatibleObjectType &   < / td >
< td class = "paramname" > < em > value< / em > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
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< p > Create an object JSON value with a given content. This constructor allows any type that can be used to construct values of type < a class = "el" href = "classnlohmann_1_1basic__json_a63691315292df8e1522b00d37ebb1ffc.html#a63691315292df8e1522b00d37ebb1ffc" > object_t< / a > . Examples include the types < code > std::map< / code > and < code > std::unordered_map< / code > .< / p >
< dl class = "tparams" > < dt > Template Parameters< / dt > < dd >
< table class = "tparams" >
< tr > < td class = "paramname" > CompatibleObjectType< / td > < td > an object type whose < code > key_type< / code > and < code > value_type< / code > is compatible to < a class = "el" href = "classnlohmann_1_1basic__json_a63691315292df8e1522b00d37ebb1ffc.html#a63691315292df8e1522b00d37ebb1ffc" > object_t< / a > < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
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< tr > < td class = "paramdir" > [in]< / td > < td class = "paramname" > value< / td > < td > a value for the object< / td > < / tr >
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< / table >
< / dd >
< / dl >
< dl class = "section user" > < dt > Complexity< / dt > < dd > Linear in the size of the passed < em > value< / em > .< / dd > < / dl >
< dl class = "exception" > < dt > Exceptions< / dt > < dd >
< table class = "exception" >
< tr > < td class = "paramname" > std::bad_alloc< / td > < td > if allocation for object value fails (thrown by the constructor of < a class = "el" href = "unionnlohmann_1_1basic__json_1_1json__value.html" > json_value< / a > )< / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "section user" > < dt > Example< / dt > < dd > The following code shows the constructor with several compatible object type parameters. < div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "preprocessor" > #include < json.hpp> < / span > < / div >
< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "preprocessor" > #include < unordered_map> < / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "keyword" > using namespace < / span > < a class = "code" href = "namespacenlohmann.html" > nlohmann< / a > ;< / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < / div >
< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < span class = "keywordtype" > int< / span > main()< / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   {< / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < span class = "comment" > // create an object from std::map< / span > < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   std::map< std::string, int> c_map< / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   {< / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   {< span class = "stringliteral" > " one" < / span > , 1}, {< span class = "stringliteral" > " two" < / span > , 2}, {< span class = "stringliteral" > " three" < / span > , 3}< / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   };< / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < a class = "code" href = "classnlohmann_1_1basic__json.html" > json< / a > j_map(c_map);< / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "comment" > // create an object from std::unordered_map< / span > < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   std::unordered_map< const char*, double> c_umap< / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   {< / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   {< span class = "stringliteral" > " one" < / span > , 1.2}, {< span class = "stringliteral" > " two" < / span > , 2.3}, {< span class = "stringliteral" > " three" < / span > , 3.4}< / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   };< / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < a class = "code" href = "classnlohmann_1_1basic__json.html" > json< / a > j_umap(c_umap);< / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "comment" > // create an object from std::multimap< / span > < / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   std::multimap< std::string, bool> c_mmap< / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   {< / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   {< span class = "stringliteral" > " one" < / span > , < span class = "keyword" > true< / span > }, {< span class = "stringliteral" > " two" < / span > , < span class = "keyword" > true< / span > }, {< span class = "stringliteral" > " three" < / span > , < span class = "keyword" > false< / span > }, {< span class = "stringliteral" > " three" < / span > , < span class = "keyword" > true< / span > }< / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   };< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < a class = "code" href = "classnlohmann_1_1basic__json.html" > json< / a > j_mmap(c_mmap); < span class = "comment" > // only one entry for key " three" is used< / span > < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < span class = "comment" > // create an object from std::unordered_multimap< / span > < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   std::unordered_multimap< std::string, bool> c_ummap< / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   {< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   {< span class = "stringliteral" > " one" < / span > , < span class = "keyword" > true< / span > }, {< span class = "stringliteral" > " two" < / span > , < span class = "keyword" > true< / span > }, {< span class = "stringliteral" > " three" < / span > , < span class = "keyword" > false< / span > }, {< span class = "stringliteral" > " three" < / span > , < span class = "keyword" > true< / span > }< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   };< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < a class = "code" href = "classnlohmann_1_1basic__json.html" > json< / a > j_ummap(c_ummap); < span class = "comment" > // only one entry for key " three" is used< / span > < / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "comment" > // serialize the JSON objects< / span > < / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   std::cout < < j_map < < < span class = "charliteral" > ' \n' < / span > ;< / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   std::cout < < j_umap < < < span class = "charliteral" > ' \n' < / span > ;< / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   std::cout < < j_mmap < < < span class = "charliteral" > ' \n' < / span > ;< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   std::cout < < j_ummap < < < span class = "charliteral" > ' \n' < / span > ;< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   }< / div >
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< div class = "ttc" id = "classnlohmann_1_1basic__json_html" > < div class = "ttname" > < a href = "classnlohmann_1_1basic__json.html" > nlohmann::basic_json< / a > < / div > < div class = "ttdoc" > a class to store JSON values < / div > < div class = "ttdef" > < b > Definition:< / b > json.hpp:121< / div > < / div >
< div class = "ttc" id = "namespacenlohmann_html" > < div class = "ttname" > < a href = "namespacenlohmann.html" > nlohmann< / a > < / div > < div class = "ttdoc" > namespace for Niels Lohmann < / div > < div class = "ttdef" > < b > Definition:< / b > json.hpp:56< / div > < / div >
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< / div > <!-- fragment --> Output: < pre class = "fragment" > {"one":1,"three":3,"two":2}
{"one":1.2,"three":3.4,"two":2.3}
{"one":true,"three":false,"two":true}
{"one":true,"three":false,"two":true}
< / pre > The example code above can be translated with< pre class = "fragment" > g++ -std=c++11 -Isrc doc/examples/basic_json__CompatibleObjectType.cpp -o basic_json__CompatibleObjectType < / pre > .< / dd > < / dl >
< dl class = "section see" > < dt > See also< / dt > < dd > < a class = "el" href = "classnlohmann_1_1basic__json_a0a9c6a1fccc4db365860463e8203eb38.html#a0a9c6a1fccc4db365860463e8203eb38" title = "create an object (explicit) " > basic_json(const object_t& )< / a > < / dd > < / dl >
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< li class = "footer" > Generated on Mon Jun 22 2015 23:22:00 for JSON for Modern C++ by
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