Fix fail_untyped for Dataclasses

[ioangatop]

What does this PR do?

Closes #241

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[mauvilsa]

@ioangatop thank you for the effort to contribute!

From what I see this pull request adds the fail_untyped parameter to add_dataclass_arguments. Indeed this is missing and it seems to resolve #241.

However, I see there is no unit test added. For every bug fix and new feature at least one unit test should be added, even if the coverage does not decrease with the code changes. Please convert the code snippet in the description #241 into a unit test.

[ioangatop]

@ioangatop thank you for the effort to contribute!

From what I see this pull request adds the fail_untyped parameter to add_dataclass_arguments. Indeed this is missing and it seems to resolve #241.

However, I see there is no unit test added. For every bug fix and new feature at least one unit test should be added, even if the coverage does not decrease with the code changes. Please convert the code snippet in the description #241 into a unit test.

@mauvilsa added!

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
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No Coverage information
0.0% Duplication

[ioangatop]

@mauvilsa thank you very much for the review and merge!

Question: because this feature is kinda important for us, do you know when you will tag a new version and release it?

Thank you again

[mauvilsa]

To release I need to run further tests with projects where we use jsonargparse. I am currently traveling and unable to do that. I will try to look into it early next week.