Issue defining FPP event with multiple string parameters

[sharifzadeh]

Hello F´ team,

I am working on a custom component (Morse2ASCII) and I have run into an issue defining an event with multiple string parameters. Specifically, I would like to log both the input text and the resulting Morse code. My FPP snippet looks like this:

event Encoded(
input: string size 128
morse: string size 256
) severity activity high format "ENC '{}' -> '{}'"

However, whenever I try to generate the project (fprime-util generate), the build fails with parser errors (most commonly “) expected” pointing at the string parameter lines):

CMake Error at lib/fprime/cmake/utilities.cmake:595 (message):
-- Configuring incomplete, errors occurred!
[sub-build] Failed to execute: info-cache/fpp_locs:
fpp-locate-defs
/../MyFirstProject/Components/Morse2ASCII/Morse2ASCII.fpp:8.7
text: string size 128
^
error: ) expected
gmake[3]: *** [CMakeFiles/fpp_locs.dir/build.make:74: locs.fpp] Error 1
gmake[3]: *** Deleting file 'locs.fpp'
gmake[2]: *** [CMakeFiles/Makefile2:2900: CMakeFiles/fpp_locs.dir/all]
Error 2
gmake[1]: *** [CMakeFiles/Makefile2:2907: CMakeFiles/fpp_locs.dir/rule]
Error 2
gmake: *** [Makefile:124: fpp_locs] Error 2
Call Stack (most recent call first):
lib/fprime/cmake/sub-build/sub-build.cmake:66 (execute_process_or_fail)
lib/fprime/cmake/FPrime.cmake:163 (run_sub_build)
lib/fprime/cmake/FPrime.cmake:233 (fprime_initialize_build_system)
CMakeLists.txt:13 (include)

I have tried different variations, such as:

1. Using commas between parameters
2. Removing the comments/annotations
3. Defining a type alias for the strings and using those instead

Unfortunately, all attempts end in a similar parser error during the fpp-locate-defs step.

Could you please clarify the correct syntax for defining events with multiple string parameters, or confirm whether this is a limitation/bug in the current FPP version?

System details:

• F´ version: [fill in, e.g., v3.3.0]
• fpp-tools version: v2.3.1 (after upgrade)
• Platform: macOS

Thanks for your guidance,

Amir

[Kronos3]

text is a keyword, try disambiguating with $text: string size 128

[sharifzadeh]

Thanks a lot. It worked!