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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis page details the \u003ccode\u003eJson\u003c/code\u003e class within the Google Cloud Spanner C++ client library, offering versions ranging from 2.11.0 to 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eJson\u003c/code\u003e class represents a lightweight, text-based, language-independent data interchange format for Spanner data.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eJson\u003c/code\u003e values can be created from and transformed into \u003ccode\u003estd::string\u003c/code\u003e objects, allowing for simple string operations on the JSON data.\u003c/p\u003e\n"],["\u003cp\u003eThe class supports standard copy, assign, and move operations, along with constructors for creating null values or from JSON-formatted strings.\u003c/p\u003e\n"],["\u003cp\u003eThere is no JSON syntax validation in the interface itself, users must ensure that the string passed is formatted properly before creating a \u003ccode\u003eJson\u003c/code\u003e value.\u003c/p\u003e\n"]]],[],null,[]]
