JSON for Modern C++  3.5.0

◆ begin() [1/2]

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 = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator, template< typename T, typename SFINAE=void > class JSONSerializer = adl_serializer>
iterator nlohmann::basic_json::begin ( )
inlinenoexcept

Returns an iterator to the first element.

range-begin-end.svg
Illustration from cppreference.com
Returns
iterator to the first element
Complexity^^ Constant.
Requirements^^ This function helps basic_json satisfying the
Container requirements:
  • The complexity is constant.
Example^^ The following code shows an example for begin(). ^^ begin.cpp
Output (play with this example online):^^
1
^^ The example code above can be translated with
g++ -std=c++11 -Isingle_include doc/examples/begin.cpp -o begin 
See also
cbegin() – returns a const iterator to the beginning
end() – returns an iterator to the end
cend() – returns a const iterator to the end
Since
version 1.0.0

Definition at line 16386 of file json.hpp.