This is a constant value that identifies the proximate cause of the error. Error reasons are unique within a particular domain of errors. This should be at most 63 characters and match a regular expression of [A-Z][A-Z0-9_]+[A-Z0-9], which represents UPPER_SNAKE_CASE.
Returns
Type
Description
std::string const &
domain() const
The logical grouping to which the "reason" belongs.
The error domain is typically the registered service name of the tool or product that generates the error. Example: "pubsub.googleapis.com". If the error is generated by some common infrastructure, the error domain must be a globally unique value that identifies the infrastructure. For Google API infrastructure, the error domain is "googleapis.com".
For errors generated by the C++ client libraries the domain is gcloud-cpp.
Returns
Type
Description
std::string const &
metadata() const
Additional structured details about this error.
Keys should match the regular expression [a-zA-Z0-9-_] and be limited to 64 characters in length.
When identifying the current value of an exceeded limit, the units should be contained in the key, not the value. For example, if the client exceeds the number of instances that can be created in a single (batch) request return {"instanceLimitPerRequest": "100"} rather than {"instanceLimit": "100/request"}.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14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\u003eThe provided content is a reference document for the \u003ccode\u003eErrorInfo\u003c/code\u003e class in the Google Cloud C++ client library, detailing its structure and usage.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eErrorInfo\u003c/code\u003e class describes the cause of an error and provides structured details, including \u003ccode\u003ereason\u003c/code\u003e, \u003ccode\u003edomain\u003c/code\u003e, and \u003ccode\u003emetadata\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe document lists available versions of \u003ccode\u003eErrorInfo\u003c/code\u003e, ranging from the latest release candidate 2.37.0-rc down to version 2.10.1, each with a corresponding link.\u003c/p\u003e\n"],["\u003cp\u003eThe document contains the parameters and details for a \u003ccode\u003eErrorInfo\u003c/code\u003e constructor that needs a reason, domain and metadata to be passed in, as well as a default constructor.\u003c/p\u003e\n"],["\u003cp\u003eThe document contains details for 3 functions in \u003ccode\u003eErrorInfo\u003c/code\u003e, \u003ccode\u003ereason()\u003c/code\u003e, \u003ccode\u003edomain()\u003c/code\u003e and \u003ccode\u003emetadata()\u003c/code\u003e that return a \u003ccode\u003estd::string const &\u003c/code\u003e, \u003ccode\u003estd::string const &\u003c/code\u003e and a \u003ccode\u003estd::unordered_map< std::string, std::string > const &\u003c/code\u003e respectively.\u003c/p\u003e\n"]]],[],null,[]]
