问题
I'm looking for the warning number for incomplete pattern matches. Anyone know what it is?
More fully, I want to make FSC.EXE return incomplete pattern matches as compile-time errors rather than warnings + run-time exceptions. Does anyone know what the warning number for this is? Specifically, this relates to compiled .fs / interactive FSI .fsx REPL interaction.
The warning:
Incomplete pattern matches on this expression. For example, the value 'LaLaLa (_)' may indicate a case not covered by the pattern(s).
How to customise:
see "--warnaserror[+|-] []"
ref: https://msdn.microsoft.com/en-us/library/dd233171(v=vs.140).aspx
回答1:
use --warnaserror+:25
To know which one it was I simply produced myself the warning using let f (Some x) = x which gaves me warning FS0025: Incomplete pattern matches on this expression. For e
xample, the value 'None' may indicate a case not covered by the pattern(s).
来源：https://stackoverflow.com/questions/30538390/compile-time-constraint-for-complete-pattern-match