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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22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 latest version of the Spanner JSON class is \u003ccode\u003e2.37.0-rc\u003c/code\u003e, which can be found linked at the top of the version history.\u003c/p\u003e\n"],["\u003cp\u003eThis documentation provides a reference for the Spanner \u003ccode\u003eJson\u003c/code\u003e class across multiple versions, ranging from \u003ccode\u003e2.37.0-rc\u003c/code\u003e down to \u003ccode\u003e2.11.0\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eJson\u003c/code\u003e class in Spanner is a lightweight, text-based representation for data interchange, adhering to JSON formatting rules.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eJson\u003c/code\u003e values can be constructed from and converted to \u003ccode\u003estd::string\u003c/code\u003e objects, and they support equality comparisons as well as streaming.\u003c/p\u003e\n"],["\u003cp\u003eThe Spanner \u003ccode\u003eJson\u003c/code\u003e class does not validate JSON syntax during construction, so users are responsible for providing well-formatted JSON strings.\u003c/p\u003e\n"]]],[],null,[]]
