JSON for Modern C++ 2.1.1
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◆ 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>
const_iterator nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer >::begin ( ) const
inlinenoexcept

Returns a const iterator to the first element.

Illustration from cppreference.com
Returns
const iterator to the first element
Complexity\n Constant.
Requirements\n This function helps basic_json satisfying the
Container requirements:
  • The complexity is constant.
  • Has the semantics of const_cast<const basic_json&>(*this).begin().
Example\n The following code shows an example for cbegin(). \n @includelineno cbegin.cpp \n Output (play with this example @htmlinclude cbegin.link):\n @verbinclude cbegin.output \n The example code above can be translated with @verbatim g++ -std=c++11 -Isrc doc/examples/cbegin.cpp -o cbegin @endverbatim
See also
begin() – returns an 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 4680 of file json.hpp.