Languages/Kusto/Kusto-Language.ps.ps1

Language function Kusto {
    <#
    .SYNOPSIS
        Kusto PipeScript Language Defintion.
    .DESCRIPTION
        Allows PipeScript to generate Kusto files.

        Multiline comments with /*{}*/ will be treated as blocks of PipeScript.

        Multiline comments can be preceeded or followed by 'empty' syntax, which will be ignored.

        The Kusto Template Transpiler will consider the following syntax to be empty:

        * ```null```
        * ```""```
        * ```''```
    #>

    [ValidatePattern('\.kql$')]
    param()
    $FilePattern = '\.kql'
    # We start off by declaring a number of regular expressions:
    $startComment = '/\*' # * Start Comments ```\*```
    $endComment   = '\*/' # * End Comments ```/*```
    $Whitespace   = '[\s\n\r]{0,}'
    # * IgnoredContext ```String.empty```, ```null```, blank strings and characters
    $IgnoredContext = "(?<ignore>(?>$("null", '""', "''" -join '|'))\s{0,}){0,1}"    
    $StartPattern = "(?<PSStart>${IgnoredContext}${startComment}\{$Whitespace)"    
    $EndPattern   = "(?<PSEnd>$Whitespace\}${endComment}\s{0,}${IgnoredContext})"
}