A simple representation for the Spanner JSON type: a lightweight, text-based, language-independent data interchange format.
JSON (the JavaScript Object Notation) defines a small set of formatting rules for the portable representation of structured data. See RFC 7159.
A Json value can be constructed from, and converted to a std::string. Json values can be compared (by string) for equality, and streamed.
There is no syntax checking of JSON strings in this interface. The user is expected to only construct Json values from well-formatted strings.
Constructors
Json(Json const &)
Regular value type, supporting copy, assign, move.
Parameter
Name
Description
Json const &
Json(Json &&)
Regular value type, supporting copy, assign, move.
Parameter
Name
Description
Json &&
Json()
A null value.
Json(std::string)
Construction from a JSON-formatted string.
Note that there is no check here that the argument string is indeed well-formatted. Error detection will be delayed until the value is passed to Spanner.
Parameter
Name
Description
s
std::string
Operators
operator=(Json const &)
Regular value type, supporting copy, assign, move.
Parameter
Name
Description
Json const &
Returns
Type
Description
Json &
operator=(Json &&)
Regular value type, supporting copy, assign, move.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22 UTC."],[[["\u003cp\u003eThe provided content outlines the documentation for the \u003ccode\u003eJson\u003c/code\u003e class within the Google Cloud Spanner C++ library, detailing its various versions and features.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eJson\u003c/code\u003e class in Spanner is a representation for handling JSON data, designed as a lightweight, text-based, and language-independent format for data interchange.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eJson\u003c/code\u003e objects can be constructed from and converted to \u003ccode\u003estd::string\u003c/code\u003e objects, as well as copied, assigned, and moved.\u003c/p\u003e\n"],["\u003cp\u003eWhile the \u003ccode\u003eJson\u003c/code\u003e class supports construction from a JSON-formatted string, it does not validate the string's format, thus requiring users to ensure well-formatted JSON strings.\u003c/p\u003e\n"],["\u003cp\u003eThis page covers versions from 2.37.0-rc (latest) down to version 2.11.0 of the Spanner C++ library, with each version link going to the class \u003ccode\u003eJson\u003c/code\u003e documentation for that specific version.\u003c/p\u003e\n"]]],[],null,[]]
