ceph/src/jaegertracing/opentelemetry-cpp/third_party/nlohmann-json/doc/mkdocs/docs/api/basic_json/operator_literal_json.md

   1 # <small>nlohmann::basic_json::</small>operator""_json
   2
   3 ```cpp
   4 json operator "" _json(const char* s, std::size_t n);
   5 ```
   6
   7 This operator implements a user-defined string literal for JSON objects. It can be used by adding `#!cpp _json` to a
   8 string literal and returns a [`json`](../json.md) object if no parse error occurred.
   9
  10 ## Parameters
  11
  12 `s` (in)
  13 :   a string representation of a JSON object
  14
  15 `n` (in)
  16 :   length of string `s`
  17
  18 ## Return value
  19
  20 [`json`](../json.md) value parsed from `s`
  21
  22 ## Exceptions
  23
  24 The function can throw anything that [`parse(s, s+n)`](parse.md) would throw.
  25
  26 ## Complexity
  27
  28 Linear.
  29
  30 ## Examples
  31
  32 ??? example
  33
  34     The following code shows how to create JSON values from string literals.
  35
  36     ```cpp
  37     --8<-- "examples/operator_literal_json.cpp"
  38     ```
  39
  40     Output:
  41
  42     ```json
  43     --8<-- "examples/operator_literal_json.output"
  44     ```
  45
  46 ## Version history
  47
  48 - Added in version 1.0.0.