String OR enum on the same input (and nothing else)?

[1984]

Hi,

is it possible to create a VI which accepts only enums on its input (either typedef or a non-typedef), but makes wire broken if anything else (eg: u16) is connected? Something like as malleable VIs can do it.

Thanks.

[raphschru]

Hi 1984,

To my knowledge, only a malleable VI could do that, because a normal VI would allow integers to be connected to the enum input (adding a coercion dot).

Here is an example implementation of a malleable VI that only accepts enums:

 - "Split Number" ensures the data type is an integer.

 - "Format Into String" with constant format "%s" forbids plain integers, which leaves only enums as possible data type.

Both functions are removed by the compiler through a process called "Dead code elimination", so it won't affect execution memory or performance.

Regards,

Raphaël.

[raphschru · Accepted solution]

If you also want to allow a string input, just add a Type Specialization Structure in your malleable VI, with another case that only compiles if a string is used:

 

Regards,

Raphaël.

[1984]

Actually this is exactly what I was looking for! Thanks!