Mike Beckerle created DAFFODIL-2646:
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Summary: Choice diagnostics too verbose
Key: DAFFODIL-2646
URL: https://issues.apache.org/jira/browse/DAFFODIL-2646
Project: Daffodil
Issue Type: Bug
Components: Back End, Diagnostics
Affects Versions: 3.2.1
Reporter: Mike Beckerle
When a choice has been discriminated, the diagnostics if the discriminated
branch fails should NOT include
{code:java}
Parse Error: All choice alternatives failed {code}
Because a discriminator isolates things to one branch.
A choice could backtrack through a few alternatives, eventually hit a
discriminator, and then fail. There may be branches that were never attempted
(after the branch where the discriminator occurred) hence, it is simply wrong
to say all alternatives failed, as there were potentially alternatives that
were never tried.
But really, once a discriminator has been evaluated to true, then the choice
should not be creating any diagnostics about the choice itself, or at worst it
should be saying "Choice Discriminated Branch Failure" only about the one
branch.
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