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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22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\u003eThis webpage provides documentation for the \u003ccode\u003eJson\u003c/code\u003e class in the Google Cloud Spanner C++ library, offering various versions of the class.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of the \u003ccode\u003eJson\u003c/code\u003e class is 2.37.0-rc, with numerous previous versions also documented, ranging down to version 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eJson\u003c/code\u003e class represents a Spanner JSON type, facilitating the representation of structured data through a text-based, language-independent format, as outlined in RFC 7159.\u003c/p\u003e\n"],["\u003cp\u003eA \u003ccode\u003eJson\u003c/code\u003e object can be constructed from and converted to a \u003ccode\u003estd::string\u003c/code\u003e, and can be compared for equality and streamed, but does not include syntax checking for the JSON string during construction.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eJson\u003c/code\u003e class supports copy, assign, and move operations, and includes constructors for creating a null value or initializing from a JSON-formatted string, as well as operators for assignment and conversion to a string.\u003c/p\u003e\n"]]],[],null,[]]
