Enumeration Type Generation Exception

[Wuchieh]

Error Description
Enum types failed to generate correctly

Reproduction Steps

1. Clone https://github.com/Wuchieh/swaggo-issus-0927
2. go mod tidy
3. go generate // Generate documentation files
4. go run .

Expected Behavior
At localhost:8080/swagger/v2/frontend/index.html, utils.Lang should appear as an enum type, not a string.

Screenshot

Swaggo Version
v1.16.4 (v1.16.6)

Go Version
go1.25.1 linux/amd64

Desktop Environment (Please provide the following details):

• Operating System: Ubuntu 24.04
• Browser: Chrome
• Version: 140.0.7339.208

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