SSDT vs 2013 and Clr function, call a Clr method name dynamically using SQLCMD variables

Question

Hello,
My question is this, hopefully this makes sense:
How could I got about doing this, inside a SQL function, I would like to re-name the Clr method call based on a SQLCMD variable? 
I have a Clr project to encrypt/decrypt data, there are different method names depending on the deployment types.
For the definition of a function called dbo.EncryptThis, I would like to use a SQLCMD variable to change the name depending on SQLCMD variables. This works fine in SQL Server Mgmt studio, but VS 2013 fails to recognize the SQLCMD variable and the build fails
with: "Error
1
SQL71521: A method with a matching signature was not found in the loaded assembly.".
THis code works fine in SQL Server Mgmt Studio, but fails to build in the SSDT project.
In the SSDT project I have the SQLCMD variable defined and think I have SQLCMD mode enabled, by doing this:
Right click file > Execution Settings > SQLCMD mode
CREATE FUNCTION [dbo].[EncryptData]
(@str NVARCHAR (MAX))
RETURNS NVARCHAR (MAX)
AS
EXTERNAL NAME [CryptoClrAssembly].[LibName].[EncryptData$(MethodName)]
Is this even possible in SSDT? or would I have to do this in a post-deploy script?

Answer 1

Hi Kevin,
Thanks for the info.
Bummer, so the only other solution I have is to create a post-deploy script to change the function based on a SQLCMD variable or other logic?
What would be really cool, would be if during the build process the SQLCMD variables would get replaced with the default value to the SQLCMD variable, thus would allow to build the project. Also, during deployment, if someone entered an incorrect method
from the assembly it would just fail.