[Issue 16356] cdouble is broken

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16356

--- Comment #3 from greensunn...@gmail.com ---
The deprecation of builtin complex types is WIP - see e.g. this PR for more
info: https://github.com/dlang/dmd/pull/5731

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