JSON for Modern C++ 3.8.0

accept
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basic_json
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~basic_json
| ## ◆ accept() [2/3] template<typename InputType >
static bool nlohmann::basic_json::accept | ( | InputType && | i,
|  | const bool | ignore_comments = `false`
| ) |  |
| inline static
  Unlike the parse(InputType&&, const parser_callback_t,const bool) function, this function neither throws an exception in case of invalid JSON input (i.e., a parse error) nor creates diagnostic information. Template Parameters
  InputType | A compatible input, for instance an std::istream object a FILE pointer a C-style array of characters a pointer to a null-terminated string of single byte characters an object obj for which begin(obj) and end(obj) produces a valid pair of iterators.
  Parameters
  [in] | i | input to read from
  [in] | ignore_comments | whether comments should be ignored and treated like whitespace (true) or yield a parse error (true); (optional, false by default)
  Returns Whether the input read from i is valid JSON. Complexity Linear in the length of the input. The parser is a predictive LL(1) parser. Note A UTF-8 byte order mark is silently ignored. Example The example below demonstrates the `accept()` function reading from a string. 1 #include <iostream> 2 #include <iomanip> 3 #include <nlohmann/json.hpp> 4 5 using json = nlohmann::json; 6 7 int main() 8 { 9 // a valid JSON text 10 auto valid_text = R"( 11 { 12 "numbers": [1, 2, 3] 13 } 14 )"; 15 16 // an invalid JSON text 17 auto invalid_text = R"( 18 { 19 "strings": ["extra", "comma", ] 20 } 21 )"; 22 23 std::cout << std::boolalpha 24 << json::accept(valid_text) << ' ' 25 << json::accept(invalid_text) << '\n'; 26 } Output (play with this example online):
      true false
  The example code above can be translated with
      g++ -std=c++11 -Isingle_include doc/examples/accept__string.cpp -o accept__string
Definition at line 23138 of file json.hpp.

nlohmann::basic_json::accept
static bool accept(InputType &&i, const bool ignore_comments=false)
check if the input is valid JSON
Definition: json.hpp:23138
nlohmann::json
basic_json<> json
default JSON class
Definition: json.hpp:2933