feat: Porting Haxe Template to Language Function (Fixes #599)

Commands/Languages/Haxe/Haxe-Language.ps.ps1

@@ -0,0 +1,30 @@
+Language function Haxe {
+    <#
+    .SYNOPSIS
+        Haxe Template Transpiler.
+    .DESCRIPTION
+        Allows PipeScript to generate Haxe.
+
+        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 Haxe Inline Transpiler will consider the following syntax to be empty:
+
+        * ```null```
+        * ```""```
+        * ```''```
+    #>
+    [ValidatePattern('\.hx$')]
+    param(
+    )
+
+    # 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})"
+}