Fix positional argument completion

[MartinGC94]

PR Summary

Fixes #17653
Instead of looking for a parameter with the exact location specified, it instead looks for the parameter with a position closest to the specified location. This fixes completion for positional parameters where an earlier positional parameter has been specified by name so the completion should look for the next positional parameter.

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[iSazonov]

What about more complex test like (expect Value3 in parameter position 3)
Verb-Noun -ParamPos0 Value0 ParamPos1Value1 -ParamPos2 Value2 ^

[MartinGC94]

Is it necessary? The logic would be the same as in the previous test: It takes the next available positional parameter. It doesn't really matter if it's the first, third or even the 30th parameter position it's looking for.

[iSazonov]

The code is too big to observe its logic in its entirety, and the test I'm asking about is a case I thought it might not work.

[MartinGC94]

That's fair. Here's how it works: The target position is found elsewhere and is based on how many positionally bound parameters have been specified, in the above example it would look for the second positional parameter (position 1) because one other positional parameter has been found.
The loop I've modified loops over the unbound parameters and parametersets that are valid based on the currently bound parameters, here it looks for any positional parameters with a position greater than or equal to the target location. It then saves whichever parameter has the lowest position and binds the argument to that.
Because it's looping over unbound parameters all the previous parameters "ParamPos0", "ParamPos1" and "ParamPos2" are automatically filtered out so the next available parameter would be "ParamPos3".

[ghost]

This pull request has been automatically marked as Review Needed because it has been there has not been any activity for 7 days.
Maintainer, please provide feedback and/or mark it as Waiting on Author

[daxian-dbw]

LGTM

[daxian-dbw]

@MartinGC94 Can you please rebase? I think the failures come from a different PR that was merged.

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Total files changed: 2

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.ps1 : +17 -0

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[daxian-dbw]

@MartinGC94 Thanks for the improvements!

[ghost]

🎉v7.4.0-preview.1 has been released which incorporates this pull request.:tada:

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