René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Splatting with arrays containing `--%`, the stop-parsing token, doesn't work if the array element containing that token happens to be `[psobject]`-wrapped","articleBody":"### Prerequisites\r\n\r\n- [X] Write a descriptive title.\r\n- [X] Make sure you are able to repro it on the [latest released version](https://github.com/PowerShell/PowerShell/releases)\r\n- [X] Search the existing issues.\r\n- [X] Refer to the [FAQ](https://github.com/PowerShell/PowerShell/blob/master/docs/FAQ.md).\r\n- [X] Refer to [Differences between Windows PowerShell 5.1 and PowerShell](https://learn.microsoft.com/powershell/scripting/whats-new/differences-from-windows-powershell).\r\n\r\n### Steps to reproduce\r\n\r\nNote:\r\n\r\n* This is an unusual scenario, because `--%` is usually only used with _external (native) programs_.\r\n\r\n* However, PowerShell functions or scripts can meaningfully leverage it by using _splatting_ to _relay_ positional arguments starting with `--%` to external programs:\r\n\r\n* This is yet another manifestation of #5579\r\n\r\n```powershell\r\n# On Windows\r\n\r\nfunction foo {\r\n  $ownArg = $args[0]\r\n  # Using Select-Object causes the problem, due to [psobject]-wrapping the elements.\r\n  $passThruArgs = $args | Select-Object -Skip 1\r\n  # To fix the problem, uncomment the next line.\r\n  # $passThruArgs[0] = $passThruArgs[0].psobject.BaseObject\r\n  cmd /c echo @passThruArgs\r\n}\r\n\r\nfoo own --% pass these args through, even with broken syntax such as \"a or b)\r\n```\r\n\r\n### Expected behavior\r\n\r\n```console\r\npass these args through, even with broken syntax such as \"a or b)\r\n```\r\n\r\nThat is, `--%`  in the array used for splatting should result in the space-concatenated, verbatim list of the remaining arguments to be copied _verbatim_ to the process command line behind the scenes.\r\n\r\n### Actual behavior\r\n\r\n```console\r\n--% \"pass these args through, even with broken syntax such as \"a or b)\"\r\n```\r\n\r\nThat is, due to the - invisible and _usually_ inconsequential - `[psobject]` wrappers created by `Select-Object`, splatting didn't recognize `--%` as the stop-parsing token, unexpectedly causing it to be passed on as an argument _itself_, and the remaining arguments to be enclosed in `\"...\"`.\r\n\r\n\r\n### Error details\r\n\r\n_No response_\r\n\r\n### Environment data\r\n\r\n```powershell\r\nPowerShell 7.5.0-preview.1\r\n```\r\n\r\n\r\n### Visuals\r\n\r\n_No response_","author":{"url":"https://github.com/mklement0","@type":"Person","name":"mklement0"},"datePublished":"2024-02-22T00:02:30.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/21260/PowerShell/issues/21260"}