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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-26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 webpage provides documentation for the `Json` class in the Google Cloud Spanner C++ library, offering various versions from 2.11.0 to the latest release candidate 2.37.0-rc."],["`Json` is a lightweight, text-based data interchange format, specifically for representing Spanner JSON types, that follows the formatting rules of the JavaScript Object Notation as defined in RFC 7159."],["The `Json` class allows for construction from and conversion to `std::string`, supporting equality comparisons and streaming, without syntax checking upon construction, but errors will be detected later when the value is passed to Spanner."],["The class supports regular value types with copy, assign, and move operations, and can also represent a null value."],["The documentation lists several constructors and operators for the `Json` class, including copy and move constructors, a null value constructor, construction from a JSON-formatted string, and conversion to a JSON-formatted string."]]],[]]
