PipeScript

0.2.7

Languages/CSharp/CSharp-Language.ps.ps1

Language function CSharp {
    <#
    .SYNOPSIS
        C# Language Definition.
    .DESCRIPTION
        Allows PipeScript to Generate C#.

        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 C# Inline Transpiler will consider the following syntax to be empty:

        * ```String.Empty```
        * ```null```
        * ```""```
        * ```''```
    .EXAMPLE
        .> {
            $CSharpLiteral = '
    namespace TestProgram/*{Get-Random}*/ {
        public static class Program {
            public static void Main(string[] args) {
                string helloMessage = /*{
                    ''"hello"'', ''"hello world"'', ''"hey there"'', ''"howdy"'' | Get-Random
                }*/ string.Empty;
                System.Console.WriteLine(helloMessage);
            }
        }
    }
    '

            [OutputFile(".\HelloWorld.ps1.cs")]$CSharpLiteral
        }

        $AddedFile = .> .\HelloWorld.ps1.cs
        $addedType = Add-Type -TypeDefinition (Get-Content $addedFile.FullName -Raw) -PassThru
        $addedType::Main(@())
    #>
    [ValidatePattern('\.cs$')]
    param(
    )

    # C# Files end in `.cs`
    $FilePattern = '\.cs$'

    # C# Projects are `.csproj`
    $ProjectFilePattern = '\.csproj$'

    # 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
    $IgnoredContext = "(?<ignore>(?>$("String\.empty", "null", '""', "''" -join '|'))\s{0,}){0,1}"
    # * StartPattern ```$IgnoredContext + $StartComment + '{' + $Whitespace```
    $StartPattern = "(?<PSStart>${IgnoredContext}${startComment}\{$Whitespace)"
    # * EndPattern ```$whitespace + '}' + $EndComment + $ignoredContext```
    $EndPattern   = "(?<PSEnd>$Whitespace\}${endComment}\s{0,}${IgnoredContext})"

    $Compiler = 'dotnet', 'build'  # To compile C#, we'll use dotnet build

    $Runner  = 'dotnet', 'run' # Get the first dotnet, if present

    $From = Object {        
        function TypeDefinitionAst {
            param(
            $TypeDefinitionAst
            )

            if ($TypeDefinitionAst -isnot [Management.Automation.Language.TypeDefinitionAst]) { return }

            if ($TypeDefinitionAst.IsEnum -and 
                $this.Enum -is [Management.Automation.PSMethodInfo]) {
                $this.Enum($TypeDefinitionAst)
            }                    
        }        

        function Enum {
            param(                
            $Enum,

            [string]
            $accessModifier = 'public'
            )
            
            
            if ($enum -is [Enum]) {

            }
            elseif ($enum -is [Management.Automation.Language.TypeDefinitionAst]) {
                    @"
$($enum.Attributes)
$accessModifier enum $($enum.Name) {
    $(@(
        foreach ($member in $enum.Members) {
            @(
                $member.Name
                if ($null -ne $member.InitialValue) {
                    '='
                    $member.InitialValue
                }
            ) -join ' '
        }
    ) -join (',' + [Environment]::NewLine + (' ' * 4)))
}
"@
            }            
        }
    }
}