JSON for Modern C++  3.6.1

◆ operator<= [1/3]

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>
bool operator<= ( const_reference  lhs,
const_reference  rhs 
)
friend

Compares whether one JSON value lhs is less than or equal to another JSON value by calculating not (rhs < lhs).

Parameters
[in]lhsfirst JSON value to consider
[in]rhssecond JSON value to consider
Returns
whether lhs is less than or equal to rhs
Complexity
Linear.
Exception safety
No-throw guarantee: this function never throws exceptions.
Example
The example demonstrates comparing several JSON types.
1 #include <iostream>
2 #include <nlohmann/json.hpp>
3 
4 using json = nlohmann::json;
5 
6 int main()
7 {
8  // create several JSON values
9  json array_1 = {1, 2, 3};
10  json array_2 = {1, 2, 4};
11  json object_1 = {{"A", "a"}, {"B", "b"}};
12  json object_2 = {{"B", "b"}, {"A", "a"}};
13  json number_1 = 17;
14  json number_2 = 17.0000000000001L;
15  json string_1 = "foo";
16  json string_2 = "bar";
17 
18  // output values and comparisons
19  std::cout << std::boolalpha;
20  std::cout << array_1 << " > " << array_2 << " " << (array_1 > array_2) << '\n';
21  std::cout << object_1 << " > " << object_2 << " " << (object_1 > object_2) << '\n';
22  std::cout << number_1 << " > " << number_2 << " " << (number_1 > number_2) << '\n';
23  std::cout << string_1 << " > " << string_2 << " " << (string_1 > string_2) << '\n';
24 }
basic_json<> json
default JSON class
Definition: json.hpp:871

Output (play with this example online):
[1,2,3] > [1,2,4] false
{"A":"a","B":"b"} > {"A":"a","B":"b"} false
17 > 17.0000000000001 false
"foo" > "bar" true
The example code above can be translated with
g++ -std=c++11 -Isingle_include doc/examples/operator__greater.cpp -o operator__greater 
Since
version 1.0.0

Definition at line 18607 of file json.hpp.