Make sure that you can suppress ParseErrors

All findings are returned by default, but if you exclude ParseErrors in -Severity we won't emit them.

Engine/Generic/RuleSeverity.cs

@@ -22,5 +22,10 @@ public enum RuleSeverity : uint
         /// ERROR: This warning is likely to cause a problem or does not follow PowerShell's required guidelines.
         /// </summary>
         Error = 2,
+
+        /// <summary>
+        /// ERROR: This diagnostic is caused by an actual parsing error, and is generated only by the engine.
+        /// </summary>
+        ParseError    = 3,
     };
 }

Engine/ScriptAnalyzer.cs

@@ -1526,8 +1526,9 @@ public IEnumerable<DiagnosticRecord> AnalyzeScriptDefinition(string scriptDefini
 
             var relevantParseErrors = RemoveTypeNotFoundParseErrors(errors, out List<DiagnosticRecord> diagnosticRecords);
 
-            // Add parse errors first!
-            if ( relevantParseErrors != null )
+            int emitParseErrors = severity == null ? 1 : severity.Count(item => item == "ParseError");
+            // Add parse errors first if requested!
+            if ( relevantParseErrors != null && emitParseErrors == 1)
             {
                 List<DiagnosticRecord> results = new List<DiagnosticRecord>();
                 foreach ( var parseError in relevantParseErrors )
@@ -1878,8 +1879,9 @@ private IEnumerable<DiagnosticRecord> AnalyzeFile(string filePath)
 #endif //!PSV3
             var relevantParseErrors = RemoveTypeNotFoundParseErrors(errors, out diagnosticRecords);
 
-            // First, add all parse errors
-            if ( relevantParseErrors != null )
+            // First, add all parse errors if they've been requested
+            int emitParseErrors = severity == null ? 1 : severity.Count(item => item == "ParseError");
+            if ( relevantParseErrors != null && emitParseErrors == 1 )
             {
                 List<DiagnosticRecord> results = new List<DiagnosticRecord>();
                 foreach ( var parseError in relevantParseErrors )