Fixes to enable SQL parser - it depends on CheckResult. (#334)

src/libraries/Microsoft.PowerFx.Core/Parser/ParserOptions.cs

@@ -19,12 +19,13 @@ namespace Microsoft.PowerFx.Core.Public
         /// </summary>
         public bool AllowsSideEffects { get; set; }
                 
+        internal ILanguageSettings LanguageSettings { get; set; }
+
         internal ParseResult Parse(string script)
         {
             var flags = AllowsSideEffects ? TexlParser.Flags.EnableExpressionChaining : TexlParser.Flags.None;
-            ILanguageSettings loc = null;
 
-            return TexlParser.ParseScript(script, loc, flags);
+            return TexlParser.ParseScript(script, LanguageSettings, flags);
         }
     }
 }

src/libraries/Microsoft.PowerFx.Core/Public/CheckResult.cs

@@ -34,12 +34,15 @@ namespace Microsoft.PowerFx.Core.Public
         /// List of errors and warnings. Check <see cref="ExpressionError.IsWarning"/>.
         /// Not null, but empty on success.
         /// </summary>
-        public IEnumerable<ExpressionError> Errors => Parse != null ?
-            Parse.Errors.Concat(BindingErrors) :
-            BindingErrors;
+        public IEnumerable<ExpressionError> Errors { get; set; }
 
         private IEnumerable<ExpressionError> BindingErrors => ExpressionError.New(_binding.ErrorContainer.GetErrors());
 
+        internal void SetErrors(IEnumerable<IDocumentError> errors)
+        {
+            Errors = ExpressionError.New(errors);
+        }
+
         /// <summary>
         /// Parsed expression for evaluation. 
         /// Null on failure or if there is no evaluation. 
@@ -70,6 +73,8 @@ namespace Microsoft.PowerFx.Core.Public
             Parse = parse ?? throw new ArgumentNullException(nameof(parse));
            
             _binding = binding;
+
+            Errors = Parse.Errors.Concat(BindingErrors);
         }
 
         public void ThrowOnErrors()