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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22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 content details the \u003ccode\u003eJson\u003c/code\u003e class within the Google Cloud Spanner C++ library, which represents a JSON value.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eJson\u003c/code\u003e values are constructed from or converted to a \u003ccode\u003estd::string\u003c/code\u003e, allowing for seamless integration with string-based operations.\u003c/p\u003e\n"],["\u003cp\u003eThe interface provides multiple constructors for creating \u003ccode\u003eJson\u003c/code\u003e values, including from a formatted string, and supports move and copy operations, but the string must be well-formatted as it lacks syntax checking.\u003c/p\u003e\n"],["\u003cp\u003eThe webpage also lists a history of versions of the \u003ccode\u003eJson\u003c/code\u003e class, beginning at 2.11.0 and extending up to the latest version, which is 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eJson\u003c/code\u003e objects can be compared for equality and streamed, and also converted to a string.\u003c/p\u003e\n"]]],[],null,[]]
