Movement and Internalization Phase 1 (#1587)

* Move Sweeper types out of Core into Sweeper project.
* Internalization of Utils.
* Internalize command line related infrastructure.
* Internalize base cursor classes.
* Internalize PFA support.
* Internalize ONNX support.
* Internalize creation of model save/load contexts.
* Internalize ITree and related types.
* Internalize Contracts.
* Remove a handful of pointless interfaces.

Author: TomFinley

src/Microsoft.ML.Core/CommandLine/ArgumentAttribute.cs

@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-// This is separated from CmdParser.cs
-
 using System;
 using System.Linq;
 
@@ -15,7 +13,8 @@ namespace Microsoft.ML.Runtime.CommandLine
     /// as the destination of command line argument parsing.
     /// </summary>
     [AttributeUsage(AttributeTargets.Field)]
-    public class ArgumentAttribute : Attribute
+    [BestFriend]
+    internal class ArgumentAttribute : Attribute
     {
         public enum VisibilityType
         {
@@ -24,35 +23,23 @@ public enum VisibilityType
             EntryPointsOnly
         }
 
-        private ArgumentType _type;
         private string _shortName;
-        private string _helpText;
-        private bool _hide;
-        private double _sortOrder;
-        private string _nullName;
-        private bool _isInputFileName;
-        private string _specialPurpose;
-        private VisibilityType _visibility;
         private string _name;
-        private Type _signatureType;
 
         /// <summary>
         /// Allows control of command line parsing.
         /// </summary>
         /// <param name="type"> Specifies the error checking to be done on the argument. </param>
         public ArgumentAttribute(ArgumentType type)
         {
-            _type = type;
-            _sortOrder = 150;
+            Type = type;
+            SortOrder = 150;
         }
 
         /// <summary>
         /// The error checking to be done on the argument.
         /// </summary>
-        public ArgumentType Type
-        {
-            get { return _type; }
-        }
+        public ArgumentType Type { get; }
 
         /// <summary>
         /// The short name(s) of the argument.
@@ -64,7 +51,7 @@ public ArgumentType Type
         /// </summary>
         public string ShortName
         {
-            get { return _shortName; }
+            get => _shortName;
             set
             {
                 Contracts.Check(value == null || !(this is DefaultArgumentAttribute));
@@ -75,54 +62,26 @@ public string ShortName
         /// <summary>
         /// The help text for the argument.
         /// </summary>
-        public string HelpText
-        {
-            get { return _helpText; }
-            set { _helpText = value; }
-        }
+        public string HelpText { get; set; }
 
-        public bool Hide
-        {
-            get { return _hide; }
-            set { _hide = value; }
-        }
+        public bool Hide { get; set; }
 
-        public double SortOrder
-        {
-            get { return _sortOrder; }
-            set { _sortOrder = value; }
-        }
+        public double SortOrder { get; set; }
 
-        public string NullName
-        {
-            get { return _nullName; }
-            set { _nullName = value; }
-        }
+        public string NullName { get; set; }
 
-        public bool IsInputFileName
-        {
-            get { return _isInputFileName; }
-            set { _isInputFileName = value; }
-        }
+        public bool IsInputFileName { get; set; }
 
         /// <summary>
         /// Allows the GUI or other tools to inspect the intended purpose of the argument and pick a correct custom control.
         /// </summary>
-        public string Purpose
-        {
-            get { return _specialPurpose; }
-            set { _specialPurpose = value; }
-        }
+        public string Purpose { get; set; }
 
-        public VisibilityType Visibility
-        {
-            get { return _visibility; }
-            set { _visibility = value; }
-        }
+        public VisibilityType Visibility { get; set; }
 
         public string Name
         {
-            get { return _name; }
+            get => _name;
             set { _name = string.IsNullOrWhiteSpace(value) ? null : value; }
         }
 
@@ -136,15 +95,8 @@ public string[] Aliases
             }
         }
 
-        public bool IsRequired
-        {
-            get { return ArgumentType.Required == (_type & ArgumentType.Required); }
-        }
+        public bool IsRequired => ArgumentType.Required == (Type & ArgumentType.Required);
 
-        public Type SignatureType
-        {
-            get { return _signatureType; }
-            set { _signatureType = value; }
-        }
+        public Type SignatureType { get; set; }
     }
 }

src/Microsoft.ML.Core/CommandLine/ArgumentType.cs

@@ -0,0 +1,54 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+
+namespace Microsoft.ML.Runtime.CommandLine
+{
+    /// <summary>
+    /// Used to control parsing of command line arguments.
+    /// </summary>
+    [Flags]
+    [BestFriend]
+    internal enum ArgumentType
+    {
+        /// <summary>
+        /// Indicates that this field is required. An error will be displayed
+        /// if it is not present when parsing arguments.
+        /// </summary>
+        Required = 0x01,
+
+        /// <summary>
+        /// Only valid in conjunction with Multiple.
+        /// Duplicate values will result in an error.
+        /// </summary>
+        Unique = 0x02,
+
+        /// <summary>
+        /// Inidicates that the argument may be specified more than once.
+        /// Only valid if the argument is a collection
+        /// </summary>
+        Multiple = 0x04,
+
+        /// <summary>
+        /// The default type for non-collection arguments.
+        /// The argument is not required, but an error will be reported if it is specified more than once.
+        /// </summary>
+        AtMostOnce = 0x00,
+
+        /// <summary>
+        /// For non-collection arguments, when the argument is specified more than
+        /// once no error is reported and the value of the argument is the last
+        /// value which occurs in the argument list.
+        /// </summary>
+        LastOccurenceWins = Multiple,
+
+        /// <summary>
+        /// The default type for collection arguments.
+        /// The argument is permitted to occur multiple times, but duplicate
+        /// values will cause an error to be reported.
+        /// </summary>
+        MultipleUnique = Multiple | Unique,
+    }
+}

src/Microsoft.ML.Core/CommandLine/CharCursor.cs

@@ -6,7 +6,7 @@
 
 namespace Microsoft.ML.Runtime.CommandLine
 {
-    public sealed class CharCursor
+    internal sealed class CharCursor
     {
         private readonly string _text;
         private readonly int _ichLim;

src/Microsoft.ML.Core/CommandLine/CmdLexer.cs

@@ -2,13 +2,12 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using System;
 using System.Text;
-using Microsoft.ML.Runtime.Internal.Utilities;
 
 namespace Microsoft.ML.Runtime.CommandLine
 {
-    public sealed class CmdLexer
+    [BestFriend]
+    internal sealed class CmdLexer
     {
         private CharCursor _curs;