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 webpage provides documentation for the `ProtoEnum` class in the Google Cloud Spanner C++ library, detailing its functionality and usage across various versions."],["The latest version available is 2.37.0-rc, while the documentation covers versions ranging from 2.11.0 up to 2.37.0-rc, with the currently displayed documentation being version 2.32.0."],["`ProtoEnum\u003cE\u003e` can be created from or converted to an `E` type, where values can also be copied, assigned, compared, and streamed."],["`ProtoEnum` has a default constructor that initializes to the first value listed in the enum and another that takes the enum type as a parameter."],["The class has a function `TypeName()` that provides the fully-qualified name of the enum type and also an operator that allows explicit conversion back into the original enum type."]]],[]]