Handle a terminating error (exception) within a scriptblock

[Joe Caverly]

While TCC already has ON ERROR, enhance TCC with an additional means to trap and handle errors.

I suggest a TRY CATCH FINALLY exception handling syntax, similar to what C# and other languages have.

Joe

 

[rconn]

TCC (and Take Command) already do that internally. The only time TCC will crash is when calling a Windows (or third-party) API when that API substitutes its own exception handler and throws a fatal exception on an error.

Or are you asking for a user-configurable exception syntax?

 

[Joe Caverly]

Using current error trapping;

@setlocal
@echo off
type foo.txt 2> nul
if %? eq 2 (
  echo File foo.txt does not exist
)
echo type returned error code %?
endlocal

Using Try/Catch/Finally;

try
  type foo.txt
catch 2
  echo File does not exist
finally
  :: Code to execute whether or not an exception is raised
  echo type returned error code %?
end try

This is just a simple example.

Joe