GeezerVison

What

buildEnums deduplicated enum constant names on EnumReplace(v), but the name actually emitted is StructName(enumName + "_" + value), which collapses characters further (non-idents to _, then _-split + title-case with no separator). So values that produce distinct EnumReplace outputs can still land on the same final identifier.

For a PostgreSQL enum like blood groups:

CREATE TYPE blood_group_type AS ENUM ('A+','A-','B+','B-','AB+','AB-','O+','O-');

"A+" → EnumReplace "A" and "A-" → "A_" are different (so the old dedup didn't fire), but StructName maps both to BloodGroupTypeA. The result was duplicate Go constants that fail to compile.

Fix

Dedup on the final constant name (the StructName output) rather than the intermediate EnumReplace value, keeping the existing value_<i> fallback on collision. Non-colliding enums are unaffected (identical output, no golden changes).

Fixes #4515

Testing

Added TestBuildEnums_DeduplicatesConstantNames. It fails on main with duplicate constant name "BloodGroupTypeA" for values "A+" and "A-" (and B/AB/O), and passes with the fix.