There do not appear to be any ninjas here. But after looking around, you discover a note on the ground, which reads:
Look at the generated IL.
(In a future version of the language, we may add source code annotations which mean 'I intend for this to be a tail call; compiler, please issue an error if it is not'.)
In general, if tail calls are enabled (no "--tailcalls-" on the command-line), then the compiler should
- translate every directly recursive tail call into a loop
- translate every other tail call into a ".tail" instruction in the IL
Unfortunately the latter bullet can be hard to identify 'by eye' in a number of corner cases.
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Hello F# ninjas,
How do I know if the MS F# compiler actually applied tail recursion optimization for some particular recursive function ?
Thanks in advance
--Omar