StatusOr returns a value on success and a Status on error.
future and promise futures (a holder that will receive a value asynchronously) and promises (the counterpart of a future, where values are stored asynchronously). They satisfy the API for std::future and std::promise, and add support for callbacks and cancellation.
More information
Error Handling for more details about how the libraries report run-time errors and how you can handle them.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThis page details common components shared across Google Cloud C++ Client Libraries, including credentials for authentication, options for client configuration, and status codes for operations.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation covers a range of versions, from the latest release candidate 2.37.0-rc down to version 2.10.1, each linked for specific reference.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eStatus\u003c/code\u003e and \u003ccode\u003eStatusOr\u003c/code\u003e classes are used for error reporting, while \u003ccode\u003efuture\u003c/code\u003e and \u003ccode\u003epromise\u003c/code\u003e objects facilitate asynchronous operations with support for callbacks and cancellation.\u003c/p\u003e\n"],["\u003cp\u003eCertain namespaces, such as those containing \u003ccode\u003einternal\u003c/code\u003e or \u003ccode\u003etesting\u003c/code\u003e, are reserved for implementation details and should not be used directly to prevent compatibility issues.\u003c/p\u003e\n"],["\u003cp\u003eThe document also contains more information for users on error handling, client library configuration, and authentication components.\u003c/p\u003e\n"]]],[],null,[]]
