A representation of the Spanner ENUM type: a protobuf enumeration.
A ProtoEnum<E> can be implicitly constructed from, and explicitly converted to an E. Values can be copied, assigned, compared for equality, and streamed.
Example
Given a proto definition enum Color { RED = 0; BLUE = 1; GREEN = 2; }:
auto e = spanner::ProtoEnum<Color>(BLUE);
assert(Color(e) == BLUE);
Constructors
ProtoEnum()
The default value is the first listed in the enum's definition.
ProtoEnum(enum_type)
Implicit construction from the enum type.
Parameter
Name
Description
v
enum_type
Operators
operator enum_type() const
Explicit conversion to the enum type.
Functions
static TypeName()
The fully-qualified name of the enum type, scope delimited by periods.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-21 UTC."],[[["This document details the `ProtoEnum` class in the Google Cloud Spanner C++ library, which represents a protobuf enumeration."],["`ProtoEnum\u003cE\u003e` instances can be constructed implicitly from and explicitly converted to the underlying enum type `E`."],["The default value of a `ProtoEnum` is the first enumerated value in the enum's definition."],["The library offers a list of Spanner versions, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc, along with links to the documentation for each version."],["`ProtoEnum` supports operations such as copying, assignment, equality comparison, and streaming, and includes methods for determining the fully-qualified name of the enum type."]]],[]]
