Powershell: Replacing Regular Expressions with Variable Groups

Say I have a regular expression like the following, but I loaded it from a file into the $ regex variable and therefore have no idea about the development time, what is its contents, but at runtime I can find that it includes "version1" , "version2", "version3" and "version4":

"Version (?<version1>\d),(?<version2>\d),(?<version3>\d),(?<version4>\d)"

... and I have the following variables:

$version1 = "3"
$version2 = "2"
$version3 = "1"
$version4 = "0"

... and I find the following line in the file:

Version 7,7,0,0

... which is stored in the $ input variable, so ($ input -match $ regex) evaluates to $ true.

How to replace the named groups from $ regex in the $ input line with the values ​​$ version1, $ version2, $ version3, $ version4 if I don’t know the order in which they appear in $ regex (only I know that $ regex includes these named groups) ?

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#define SOME_MACRO(4, 1, 0, 0)

Version "1.2.3.4"

SomeStruct vs = { 99,99,99,99 }

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:

• $input - ,
• $regex - ( [string]), , ,
• $regexToGroupName - -, , , [regex]:: GetGroupNames(), ,
• $groupNameToVersionNumber - -, .

$regex ( ), .

# This will give us the index and extent of each substring
# that we will be replacing (the parts that we will not keep)
$matchResults = ([regex]$regex).match($input)

# This will hold substrings from $input that were not captured
# by any of the supported named groups, as well as the replacement
# version strings, properly ordered, but will omit substrings captured
# by the named groups
$lineParts = @()
$startingIndex = 0
foreach ($groupName in $regexToGroupName.$regex)
{
    # Excise the substring leading up to the match for this group...
    $lineParts = $lineParts + $input.Substring($startingIndex, $matchResults.groups[$groupName].Index - $startingIndex)

    # Instead of the matched substring, we'll use the substitution
    $lineParts = $lineParts + $groupNameToVersionNumber.$groupName

    # Set the starting index of the next substring that we will keep...
    $startingIndex = $matchResults.groups[$groupName].Index + $matchResults.groups[$groupName].Length
}

# Keep the end of the original string (if there anything left)
$lineParts = $lineParts + $input.Substring($startingIndex, $input.Length - $startingIndex)

$newLine = ""
foreach ($part in $lineParts)
{
   $newLine = $newLine + $part
}
$input= $newLine