- Adds `LanguagePrimitives.IsNullLike()` method to account for `DBNull.Value` and `NullString.Value` so that they can be considered the same as a null value where sensible in PowerShell.
- Updates `-ne` and `-eq` binders to treat `DBNull.Value` and `NullString.Value` as equal to null/AutomationNull.
- Update code paths for comparing objects in LanguagePrimitives to ensure consistency with how the `-eq` and `-ne` binders work when calling LanguagePrimitives methods to do the comparisons.
- Make `LanguagePrimitives.IsNull()` and `LanguagePrimitives.IsNullLike()` public methods.
- Added tests for null behaviours in `NullRepresentatives.Tests.ps1`
.NET Core changes to return "shortest roundtrippable string" by default for the ToString() method of double and float types. This results in ToString() for double/float values sometimes return a string in 17-digit/9-digit precision format. This PR updated the double/float-to-string conversion in PowerShell to continue using the old precision specifier before the change in .NET Core 3.0.
`Read-Host` calls into `$Host.UI.Prompt()`. However, this method is also used when the host prompts for mandatory parameters that aren't provided. The method expects to be called when given a `FieldDescription` and if the input starts with `!` it enters `CommandPromptMode`. In this mode, you can type `!?` to request help, for example. However this mode is not something you can use via `Read-Host` (only if calling `$Host.UI.Prompt()` directly passing in a well constructed `FieldDescription`). When using `Read-Host -Prompt`, the cmdlet creates a `FieldDescription` where the name is the prompt and the rest of the properties are empty.
The fix is that if `Label` is empty, we can assume it's being called from `Read-Host` rather than being called to prompt for a mandatory parameter and thus not enter `CommandPromptMode`.
Expands line continuance for pipelines to allow lines to continue automatically without backticks with the pipe symbol at the start of a line.
This adds to the existing functionality where pipes can be used to continue lines by placing them at the end of a line.
* return correct casing of filesystem path during normalization
* handle UNC case
* handle case to add trailing separator back
* add support for NTFS streams syntax
* add case-sensitive test
* only apply correct casing to directories
* handle 8.3 path syntax
* fix short path processing
Re-add wildcard when searching AST + Missed test case.
## PR Context
In #8109, we removed the line that added a wildcard to the end of the command that was used to match commands in the script AST. This readds that line closer to where it is used.