Generate PowerShell code from a regex

$input    = 'Reach alice@example.com or bob@test.org.'
$pattern  = '\\b\\w+@\\w+\\.\\w+\\b'

# Single match test
$isMatch = $input -cmatch $pattern
"isMatch: $isMatch"

# First match (with capture groups in $Matches)
if ($input -cmatch $pattern) {
    "first:    $($Matches[0])"
}

# All matches via .NET regex
$opts = [System.Text.RegularExpressions.RegexOptions]::None
$all  = [regex]::Matches($input, $pattern, $opts)
"all:      " + ($all | ForEach-Object { $_.Value }) -join ", "

# Replace
$replaced = $input -creplace $pattern, '[email]'
"replaced: $replaced"

# Split
$parts = [regex]::Split($input, $pattern, $opts)
"parts:    " + ($parts -join " | ")

# Search a file
# Select-String -Path .\file.txt -Pattern $pattern -AllMatches