Boo

Exception Handling: Allow for exception filters

Details

  • Type: New Feature New Feature
  • Status: Resolved Resolved
  • Priority: Minor Minor
  • Resolution: Fixed
  • Affects Version/s: 0.7.9
  • Fix Version/s: 0.8.1
  • Component/s: Compiler, Emitter, Parser
  • Labels:
    None
  • Testcase included:
    yes
  • Patch Submitted:
    Yes
  • Number of attachments :
    3

Description

The CLI currently provides a mechanism, 'filter', so that it will only handle an exception if a condition holds:

For an example: http://dotnet.org.za/armand/archive/2005/11/09/48087.aspx and http://www.microsoft.com/mspress/books/sampchap/5771.aspx

proposed syntax:

except ex as SomeException if arg is not null:
  print "arg is not null, so I'll handle it"

except as SomeException if ItDidntWork():
  print "It Didn't Work, but I'll handle it."

except unless boolArg:
  print "boolArg was true, so I'll handle it."
  1. Text File
    exception.patch
    07/Oct/07 11:55 AM
    27 kB
    Marcus Griep
  2. Text File
    exception.redux.patch
    25/Oct/07 4:51 PM
    27 kB
    Marcus Griep
  3. Text File
    exceptions.redux2.patch
    26/Oct/07 12:24 PM
    45 kB
    Marcus Griep

Issue Links

is related to

Bug - A problem which impairs or prevents the functions of the product. BOO-836 WSA Boo "end" keyword required for some blocks and not others

  • Major - Major loss of function.
  • Closed - The issue is considered finished, the resolution is correct. Issues which are not closed can be reopened.
relates to

New Feature - A new feature of the product, which has yet to be developed. BOO-880 Exception Handling: Allow for exception fault handlers

  • Minor - Minor loss of function, or other problem where easy workaround is present.
  • Closed - The issue is considered finished, the resolution is correct. Issues which are not closed can be reopened.

Task - A task that needs to be done. BOO-910 Boo doesn't catch non-CLS compliant exceptions at runtime

  • Major - Major loss of function.
  • Closed - The issue is considered finished, the resolution is correct. Issues which are not closed can be reopened.
supercedes

New Feature - A new feature of the product, which has yet to be developed. BOO-877 Exception Handling: Allow anonymous typed handlers

  • Major - Major loss of function.
  • Closed - The issue is considered finished, the resolution is correct. Issues which are not closed can be reopened.

Improvement - An improvement or enhancement to an existing feature or task. BOO-876 Exception Handling: Remove hidden '__exception' variable

  • Major - Major loss of function.
  • Closed - The issue is considered finished, the resolution is correct. Issues which are not closed can be reopened.

Activity

Ascending order - Click to sort in descending order
Hide
Permalink
Marcus Griep added a comment -

A smaller, more succinct, and complete patch file for all linked exception issues.

Show
Marcus Griep added a comment - A smaller, more succinct, and complete patch file for all linked exception issues.
Hide
Permalink
Marcus Griep added a comment -

Modified cases to use (if/unless) now that when is no longer reserved. New patch to be uploaded soon.

Show
Marcus Griep added a comment - Modified cases to use (if/unless) now that when is no longer reserved. New patch to be uploaded soon.
Hide
Permalink
Marcus Griep added a comment -

New patch with linked up tests.

Show
Marcus Griep added a comment - New patch with linked up tests.
Hide
Permalink
Rodrigo B. de Oliveira added a comment -

Could you use Declaration with a null name instead of adding a TypeReference field to ExceptionHandler?

Show
Rodrigo B. de Oliveira added a comment - Could you use Declaration with a null name instead of adding a TypeReference field to ExceptionHandler?
Hide
Permalink
Marcus Griep added a comment -

Updated to no longer use a TypeReference in the Exception Handler and to properly implement "Option B" (Fault block executes on uncaught exceptions, before finally). Includes comments in Emit Assembly detailing workaround necessary due to shortcoming in Reflection.Emit.ILGenerator.

Show
Marcus Griep added a comment - Updated to no longer use a TypeReference in the Exception Handler and to properly implement "Option B" (Fault block executes on uncaught exceptions, before finally). Includes comments in Emit Assembly detailing workaround necessary due to shortcoming in Reflection.Emit.ILGenerator.
Hide
Permalink
Marcus Griep added a comment -

Small fix. (Accidentally included non-germane patch stuffs)

Show
Marcus Griep added a comment - Small fix. (Accidentally included non-germane patch stuffs)
Hide
Permalink
Marcus Griep added a comment -

Complete and fully re-tested. (Why do patch files have to be so picky )

Show
Marcus Griep added a comment - Complete and fully re-tested. (Why do patch files have to be so picky )
Hide
Permalink
Marcus Griep added a comment -

Revision 2744

Show
Marcus Griep added a comment - Revision 2744

People

  • Assignee:
    Marcus Griep
    Reporter:
    Marcus Griep
Vote (0)
Watch (0)

Dates

  • Created:
    Updated:
    Resolved: