Snippet with complex completer

ExampleCompleter.ps1

[ArgumentCompleter({
    param(
        [string]$commandName,
        [string]$parameterName,
        [string]$wordToComplete,
        [System.Management.Automation.Language.CommandAst]$commandAst,
        [System.Collections.IDictionary]$fakeBoundParameters
    )
    $types = @{
        And   = '1.2.840.113556.1.4.803', 'LDAP_MATCHING_RULE_BIT_AND'
        Or    = '1.2.840.113556.1.4.804', 'LDAP_MATCHING_RULE_BIT_OR'
        Chain = '1.2.840.113556.1.4.1941', 'LDAP_MATCHING_RULE_IN_CHAIN'
    }

    switch -Regex ($wordToComplete) {
        '^(groupType|userAccountControl):$' {
            foreach ($key in 'And', 'Or') {
                $line = "$_$($types.$key[0]):="
                $attribute = $Matches[1]
                [System.Management.Automation.CompletionResult]::new(
                    $line,
                    $line,
                    [System.Management.Automation.CompletionResultType]::ParameterValue,
                    "Matching rule $($types.$key[1]) for attribute $attribute"
                )
            }
        }
        '^(member|memberof):$' {
            $line = "$_$($types.Chain[0]):="
            $attribute = $Matches[1]
            [System.Management.Automation.CompletionResult]::new(
                $line,
                $line,
                [System.Management.Automation.CompletionResultType]::ParameterValue,
                "Matching rule $($types.Chain[1]) for attribute $attribute"
            )
        }
        '^(?!.*=)' {
            $searcher = [ADSISearcher]::new(
                [ADSI]'LDAP://CN=Schema,CN=Configuration,DC=monad,DC=net',
                "(&(objectClass=attributeSchema)(lDAPDisplayName=$wordToComplete*))",
                @(
                    'lDAPDisplayName'
                    'name'
                )
            )
            $searcher.FindAll() | ForEach-Object {
                $attribute = -join $_.Properties['lDAPDisplayName'][0]
                $name = -join $_.Properties['name'][0]
                [System.Management.Automation.CompletionResult]::new(
                    $attribute,
                    $attribute,
                    [System.Management.Automation.CompletionResultType]::ParameterValue,
                    "Attribute $attribute ($name)"
                )                        
            }
        }
    }
})]
[string[]]$Filter = '(name=*)',