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 2025-03-14 UTC."],[[["This page details the `ProtoEnum` class in the Google Cloud Spanner C++ library, which represents a protobuf enumeration."],["The latest version available is 2.37.0-rc, and the document provides links to versions ranging from 2.37.0-rc down to 2.11.0."],["`ProtoEnum` can be constructed implicitly from an enum type `E` and converted explicitly back to an `E`, allowing for operations like copying, assignment, comparison, and streaming."],["`ProtoEnum` includes a default constructor that sets the value to the first listed item in the enum's definition and a method `TypeName()` to get the fully qualified name of the enum type."],["The alias `enum_type` refers to the underlying `E` type."]]],[]]
