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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22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 available is 2.37.0-rc, with a range of previous versions from 2.36.0 down to 2.11.0 also accessible.\u003c/p\u003e\n"],["\u003cp\u003eThis content describes the \u003ccode\u003eJson\u003c/code\u003e class within the Spanner C++ library, which represents a lightweight, text-based data interchange format based on JSON.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eJson\u003c/code\u003e class can be constructed from and converted to \u003ccode\u003estd::string\u003c/code\u003e, allowing comparison for equality and streaming.\u003c/p\u003e\n"],["\u003cp\u003eThe user is responsible for ensuring that strings used to construct \u003ccode\u003eJson\u003c/code\u003e values are well-formatted, as there is no syntax validation performed by this interface.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eJson\u003c/code\u003e objects support copy, assignment, move operations and have constructors for null values and from a JSON-formatted string, along with operators for string conversion.\u003c/p\u003e\n"]]],[],null,[]]
