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https://issues.apache.org/jira/browse/THRIFT-5859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17938716#comment-17938716
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Duru Can Celasun commented on THRIFT-5859:
------------------------------------------
There are two use cases here, and I don't think they necessarily share the same
solution.
For enumerating all values, the cleanest approach is returning []Foo.
For checking whether a value is valid/defined, I think it's cleaner to have a
generated function like:
{code:java}
func (Foo) IsValid(v Foo) bool {
return v==ONE || v==TWO
}
{code}
Or, alternatively:
{code:java}
var fooKnownValues = map[Foo]bool {
ONE: true,
TWO: true,
}
func (Foo) IsValid(v Foo) bool {
return fooKnownValues[v]
}{code}
> go: Generate a map for know values of an enum type
> --------------------------------------------------
>
> Key: THRIFT-5859
> URL: https://issues.apache.org/jira/browse/THRIFT-5859
> Project: Thrift
> Issue Type: Task
> Components: Go - Compiler
> Affects Versions: 0.21.0
> Reporter: Yuxuan Wang
> Assignee: Yuxuan Wang
> Priority: Major
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> When an enum type is defined in thrift, in generated go code, there's no way
> to enumerate all the known values of the enum type. In most other languages
> there's usually a way (via reflecting, access to some private fields, etc.)
> to get those.
> I propose to also generate a map like:
> {code:go}
> var FooKnownValues = map[Foo]bool {
> ONE: true,
> TWO: true,
> }
> {code}
> So it can be used to enumerate all defined values programmatically.
> Open to suggestions on the name of the map value :)
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