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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-26 UTC."],[[["The page provides documentation for the `Json` class within the Google Cloud Spanner C++ library, with the latest release candidate being version 2.37.0-rc."],["The `Json` class facilitates the representation of JSON data in a lightweight, text-based, and language-independent format, as outlined by RFC 7159."],["`Json` values can be constructed from and converted to `std::string`, compared for equality, and streamed, although it is expected that only well-formatted strings are used for construction, as no syntax checking is performed."],["The `Json` class supports standard value type operations like copy, assignment, and move, and it offers various constructors, including one for creating a null value and another for constructing from a JSON-formatted `std::string`."],["The documentation includes detailed information about the `Json` class's operators, specifically assignment and conversion to a JSON-formatted string."]]],[]]
