Json_key_comparator Struct Reference

A comparator that is used for ordering keys in a Json_object. More...

#include <json_dom.h>

Public Types
using	is_transparent = void

Public Member Functions
bool	operator() (std::string_view key1, std::string_view key2) const
	Compare two keys from a JSON object and determine whether or not the first key is less than the second key. More...

Detailed Description

A comparator that is used for ordering keys in a Json_object.

It orders the keys on length, and lexicographically if the keys have the same length. The ordering is ascending. This ordering was chosen for speed of look-up. See usage in Json_object_map.

Member Typedef Documentation

is_transparent

using Json_key_comparator::is_transparent = void

Member Function Documentation

operator()()

bool Json_key_comparator::operator()	(	std::string_view	key1,
		std::string_view	key2
	)		const

Compare two keys from a JSON object and determine whether or not the first key is less than the second key.

key1 is considered less than key2 if

a) key1 is shorter than key2, or if

b) key1 and key2 have the same length, but different contents, and the first byte that differs has a smaller value in key1 than in key2

Otherwise, key1 is not less than key2.

Parameters

key1	the first key to compare
key2	the second key to compare

Returns

true if key1 is considered less than key2, false otherwise

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The documentation for this struct was generated from the following files:

• sql-common/json_dom.h
• sql-common/json_dom.cc