Get rid of ArrayUtils.EmptyObjects

Src/IronPython.Modules/_thread.cs

@@ -228,9 +228,9 @@ public void Start() {
                 try {
 #pragma warning disable 618 // TODO: obsolete
                     if (_kwargs != null) {
-                        PythonOps.CallWithArgsTupleAndKeywordDictAndContext(_context, _func, ArrayUtils.EmptyObjects, ArrayUtils.EmptyStrings, _args, _kwargs);
+                        PythonOps.CallWithArgsTupleAndKeywordDictAndContext(_context, _func, [], [], _args, _kwargs);
                     } else {
-                        PythonOps.CallWithArgsTuple(_func, ArrayUtils.EmptyObjects, _args);
+                        PythonOps.CallWithArgsTuple(_func, [], _args);
                     }
 #pragma warning restore 618
                 } catch (SystemExitException) {

Src/IronPython/Compiler/Ast/ClassDefinition.cs

@@ -15,7 +15,6 @@
 using IronPython.Runtime;
 
 using Microsoft.Scripting;
-using Microsoft.Scripting.Actions;
 using Microsoft.Scripting.Utils;
 
 using AstUtils = Microsoft.Scripting.Ast.Utils;
@@ -403,7 +402,7 @@ public static string[] FindNames(FunctionDefinition function) {
 
                 if (parameters.Count == 0) {
                     // no point analyzing function with no parameters
-                    return ArrayUtils.EmptyStrings;
+                    return [];
                 }
 
                 var finder = new SelfNameFinder(function, parameters[0]);

Src/IronPython/Compiler/Ast/FunctionDefinition.cs

@@ -5,21 +5,20 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading;
-using System.Runtime.CompilerServices;
-
-using Microsoft.Scripting;
-using Microsoft.Scripting.Interpreter;
-using Microsoft.Scripting.Utils;
 
 using IronPython.Runtime;
 using IronPython.Runtime.Operations;
 
-using MSAst = System.Linq.Expressions;
+using Microsoft.Scripting;
+using Microsoft.Scripting.Interpreter;
+using Microsoft.Scripting.Utils;
 
-using LightLambdaExpression = Microsoft.Scripting.Ast.LightLambdaExpression;
 using AstUtils = Microsoft.Scripting.Ast.Utils;
+using LightLambdaExpression = Microsoft.Scripting.Ast.LightLambdaExpression;
+using MSAst = System.Linq.Expressions;
 
 namespace IronPython.Compiler.Ast {
     using Ast = MSAst.Expression;
@@ -85,8 +84,7 @@ internal override MSAst.Expression LocalContext {
         internal override int ArgCount {
             get {
                 int argCount = 0;
-                for (argCount = 0; argCount < _parameters.Length; argCount++)
-                {
+                for (argCount = 0; argCount < _parameters.Length; argCount++) {
                     Parameter p = _parameters[argCount];
                     if (p.IsDictionary || p.IsList || p.IsKeywordOnly) break;
                 }
@@ -256,7 +254,7 @@ internal override void Bind(PythonNameBinder binder) {
                 NeedsLocalsDictionary = true;
             }
         }
-        
+
         internal override void FinishBind(PythonNameBinder binder) {
             foreach (var param in _parameters) {
                 _variableMapping[param.PythonVariable] = param.FinishBind(forceClosureCell: ExposesLocalVariable(param.PythonVariable));
@@ -286,7 +284,7 @@ public override MSAst.Expression Reduce() {
                 new SourceSpan(GlobalParent.IndexToLocation(StartIndex), GlobalParent.IndexToLocation(HeaderIndex))
             );
         }
-        
+
         /// <summary>
         /// Returns an expression which creates the function object.
         /// </summary>
@@ -542,7 +540,7 @@ public override int Run(InterpretedFrame frame) {
                         defaults[i] = frame.Pop();
                     }
                 } else {
-                    defaults = ArrayUtils.EmptyObjects;
+                    defaults = [];
                 }
 
                 object modName;
@@ -779,7 +777,7 @@ internal override IList<string> GetVarNames() {
 
             return res;
         }
-        
+
         private void InitializeParameters(List<MSAst.Expression> init, bool needsWrapperMethod, MSAst.Expression[] parameters) {
             for (int i = 0; i < _parameters.Length; i++) {
                 Parameter p = _parameters[i];
@@ -829,10 +827,10 @@ private static Type GetDelegateType(Parameter[] parameters, bool wrapper, out De
 
         internal override void RewriteBody(MSAst.ExpressionVisitor visitor) {
             _dlrBody = null;    // clear the cached body if we've been reduced
-            
+
             MSAst.Expression funcCode = GlobalParent.Constant(GetOrMakeFunctionCode());
             FuncCodeExpr = funcCode;
-            
+
             Body = new RewrittenBodyStatement(Body, visitor.Visit(Body));
         }
 

Src/IronPython/Compiler/Ast/ScopeStatement.cs

@@ -92,7 +92,7 @@ public abstract class ScopeStatement : Statement {
         ///
         /// It is used to ensure that the first argument is accessible through a closure cell.
         /// </summary>
-        internal bool ContainsSuperCall{ get; set; }
+        internal bool ContainsSuperCall { get; set; }
 
         public virtual string Name => "<unknown scope>";
 
@@ -116,7 +116,7 @@ public abstract class ScopeStatement : Statement {
         internal bool NeedsLocalContext
             => NeedsLocalsDictionary || ContainsNestedFreeVariables || ContainsSuperCall;
 
-        internal virtual string[] ParameterNames => ArrayUtils.EmptyStrings;
+        internal virtual string[] ParameterNames => [];
 
         internal virtual int ArgCount => 0;
 
@@ -439,7 +439,7 @@ private PythonVariable CreateNonlocalVariable(string name) {
         }
 
         internal void EnsureNonlocalVariable(string name, NonlocalStatement node) {
-           _nonlocalVars ??= new();
+            _nonlocalVars ??= new();
             if (!_nonlocalVars.ContainsKey(name)) {
                 CreateNonlocalVariable(name);
                 _nonlocalVars[name] = node;
@@ -611,7 +611,7 @@ internal MSAst.Expression? FuncCodeExpr {
 
         internal MSAst.MethodCallExpression CreateLocalContext(MSAst.Expression parentContext, bool newNamespace = true) {
             var closureVariables = _closureVariables ?? Array.Empty<ClosureInfo>();
-            
+
             int numFreeVars = FreeVariables?.Count ?? 0;
             int firstArgIdx = -1;
             if ((NeedsLocalsDictionary || ContainsSuperCall) && ArgCount > 0) {

Src/IronPython/Compiler/Parser.cs

@@ -804,7 +804,7 @@ private ModuleName ParseRelativeModuleName() {
                 dotCount++;
             }
 
-            string[] names = ArrayUtils.EmptyStrings;
+            string[] names = [];
             if (PeekToken() is NameToken) {
                 names = ReadNames();
             }

Src/IronPython/Runtime/Binding/WarningInfo.cs

@@ -2,12 +2,12 @@
 // The .NET Foundation licenses this file to you under the Apache 2.0 License.
 // See the LICENSE file in the project root for more information.
 
+using System;
 using System.Dynamic;
 using System.Linq.Expressions;
 
 using IronPython.Runtime.Operations;
 using IronPython.Runtime.Types;
-using Microsoft.Scripting.Utils;
 
 using AstUtils = Microsoft.Scripting.Ast.Utils;
 
@@ -29,7 +29,7 @@ public WarningInfo(PythonType/*!*/ type, string/*!*/ message, Expression conditi
                 codeContext,
                 AstUtils.Constant(_type),
                 AstUtils.Constant(_message),
-                AstUtils.Constant(ArrayUtils.EmptyObjects)
+                AstUtils.Constant(Array.Empty<object>())
             );
 
             if (_condition != null) {

Src/IronPython/Runtime/BuiltinPythonModule.cs

@@ -2,9 +2,10 @@
 // The .NET Foundation licenses this file to you under the Apache 2.0 License.
 // See the LICENSE file in the project root for more information.
 
-using System;
 using System.Collections.Generic;
+
 using IronPython.Compiler;
+
 using Microsoft.Scripting.Utils;
 
 namespace IronPython.Runtime {
@@ -50,7 +51,7 @@ protected internal virtual void Initialize(CodeContext/*!*/ codeContext, Diction
         /// direct access to global members.
         /// </summary>
         protected internal virtual IEnumerable<string/*!*/>/*!*/ GetGlobalVariableNames() {
-            return ArrayUtils.EmptyStrings;
+            return [];
         }
 
         /// <summary>

Src/IronPython/Runtime/Converter.cs

@@ -532,7 +532,7 @@ public static bool CanConvertFrom(Type fromType, Type toType, NarrowingLevel all
         private static TypeConverter GetTypeConverter(TypeConverterAttribute tca) {
             try {
                 ConstructorInfo ci = Type.GetType(tca.ConverterTypeName).GetConstructor(ReflectionUtils.EmptyTypes);
-                if (ci != null) return ci.Invoke(ArrayUtils.EmptyObjects) as TypeConverter;
+                if (ci != null) return ci.Invoke([]) as TypeConverter;
             } catch (TargetInvocationException) {
             }
             return null;

Src/IronPython/Runtime/Exceptions/PythonExceptions.cs

@@ -6,11 +6,8 @@
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Diagnostics;
-using System.Dynamic;
 using System.IO;
-using System.Linq.Expressions;
 using System.Reflection;
-using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Text;
 using System.Threading;
@@ -122,7 +119,7 @@ public override string ToString() {
         }
 
         public partial class _OSError {
-            public static new object __new__(PythonType cls, [ParamDictionary]IDictionary<string, object> kwArgs, params object[] args) {
+            public static new object __new__(PythonType cls, [ParamDictionary] IDictionary<string, object> kwArgs, params object[] args) {
                 if (cls == OSError && args.Length >= 1 && args[0] is int errno) {
                     if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
                         if (args.Length >= 4 && args[3] is int winerror) {
@@ -223,8 +220,7 @@ private static Error ErrnoToErrorEnum(int errno) {
             }
 
             private static PythonType ErrnoToPythonType(Error errno) {
-                var res = errno switch
-                {
+                var res = errno switch {
                     Error.EPERM => PermissionError,
                     Error.ENOENT => FileNotFoundError,
                     Error.ESRCH => ProcessLookupError,
@@ -239,8 +235,7 @@ private static PythonType ErrnoToPythonType(Error errno) {
                     _ => null
                 };
                 if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) || RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) {
-                    res ??= errno switch
-                    {
+                    res ??= errno switch {
                         // Windows or remapped OSX
                         Error.WSAEWOULDBLOCK => BlockingIOError,
                         Error.WSAEINPROGRESS => BlockingIOError,
@@ -253,8 +248,7 @@ private static PythonType ErrnoToPythonType(Error errno) {
                         _ => null
                     };
                 } else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) {
-                    res ??= errno switch
-                    {
+                    res ??= errno switch {
                         // Linux
                         Error.ECONNABORTED => ConnectionAbortedError,
                         Error.ECONNRESET => ConnectionResetError,
@@ -529,7 +523,7 @@ internal static int WinErrorToErrno(int winerror) {
         }
 
         public partial class _ImportError {
-            public void __init__([ParamDictionary]IDictionary<string, object> kwargs, params object[] args) {
+            public void __init__([ParamDictionary] IDictionary<string, object> kwargs, params object[] args) {
                 base.__init__(args);
 
                 foreach (var pair in kwargs) {
@@ -702,7 +696,7 @@ internal static BaseException CreateBaseExceptionForRaise(CodeContext/*!*/ conte
             if (PythonOps.IsInstance(value, type)) {
                 pyEx = value;
             } else if (value is PythonTuple) {
-                pyEx = PythonOps.CallWithArgsTuple(type, ArrayUtils.EmptyObjects, value);
+                pyEx = PythonOps.CallWithArgsTuple(type, [], value);
             } else if (value != null) {
                 pyEx = PythonCalls.Call(context, type, value);
             } else {

Src/IronPython/Runtime/FunctionCode.cs

@@ -2,27 +2,26 @@
 // The .NET Foundation licenses this file to you under the Apache 2.0 License.
 // See the LICENSE file in the project root for more information.
 
-using System.Linq.Expressions;
-using Microsoft.Scripting.Ast;
-
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Linq.Expressions;
 using System.Reflection;
 using System.Runtime.CompilerServices;
 using System.Threading;
 
+using IronPython.Compiler;
+using IronPython.Runtime.Operations;
+using IronPython.Runtime.Types;
+
 using Microsoft.Scripting;
+using Microsoft.Scripting.Ast;
 using Microsoft.Scripting.Debugging.CompilerServices;
 using Microsoft.Scripting.Generation;
 using Microsoft.Scripting.Interpreter;
 using Microsoft.Scripting.Runtime;
 using Microsoft.Scripting.Utils;
 
-using IronPython.Compiler;
-using IronPython.Runtime.Operations;
-using IronPython.Runtime.Types;
-
 namespace IronPython.Runtime {
     /// <summary>
     /// Represents a piece of code.  This can reference either a CompiledCode
@@ -601,7 +600,7 @@ internal object Call(CodeContext/*!*/ context) {
                 return optimizedModuleCode(this);
             }
 
-            var func = new PythonFunction(context, this, null, ArrayUtils.EmptyObjects, null, null, new MutableTuple<object>());
+            var func = new PythonFunction(context, this, null, [], null, null, new MutableTuple<object>());
             CallSite<Func<CallSite, CodeContext, PythonFunction, object>> site = context.LanguageContext.FunctionCallSite;
             return site.Target(site, context, func);
         }
@@ -772,7 +771,7 @@ private LambdaExpression GetGeneratorOrNormalLambdaTracing(PythonContext context
             );
         }
 
-        
+
         /// <summary>
         /// Gets the correct final LambdaExpression for this piece of code.
         /// 
@@ -784,8 +783,8 @@ private LightLambdaExpression GetGeneratorOrNormalLambda() {
                 finalCode = Code;
             } else {
                 finalCode = Code.ToGenerator(
-                    _lambda.ShouldInterpret, 
-                    _lambda.EmitDebugSymbols, 
+                    _lambda.ShouldInterpret,
+                    _lambda.EmitDebugSymbols,
                     _lambda.GlobalParent.PyContext.Options.CompilationThreshold
                 );
             }
@@ -838,7 +837,7 @@ private Delegate CompileLambda(LambdaExpression code, EventHandler<LightLambdaCo
 
         internal Delegate AddRecursionCheck(PythonContext context, Delegate finalTarget) {
             if (context.RecursionLimit != Int32.MaxValue) {
-                if (finalTarget is Func<CodeContext, CodeContext> || 
+                if (finalTarget is Func<CodeContext, CodeContext> ||
                     finalTarget is Func<FunctionCode, object> ||
                     finalTarget is LookupCompilationDelegate) {
                     // no recursion enforcement on classes or modules
@@ -1185,7 +1184,6 @@ public Dictionary<int, bool> LoopOrFinallyIds {
                     return _loopIds;
                 }
             }
-
         }
     }
 }

Src/IronPython/Runtime/ModuleDictionaryStorage.cs

@@ -6,11 +6,12 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Reflection;
+
 using IronPython.Compiler;
 using IronPython.Runtime.Types;
+
 using Microsoft.Scripting.Actions;
 using Microsoft.Scripting.Runtime;
-using Microsoft.Scripting.Utils;
 
 namespace IronPython.Runtime {
     /// <summary>
@@ -162,7 +163,7 @@ private bool TryGetLazyValue(string name, bool publish, out object value) {
 
                             var propInfo = (PropertyInfo)members[0];
                             if ((propInfo.GetGetMethod() ?? propInfo.GetSetMethod()).IsStatic) {
-                                value = ((PropertyInfo)members[0]).GetValue(null, ArrayUtils.EmptyObjects);
+                                value = ((PropertyInfo)members[0]).GetValue(null, []);
                             } else {
                                 throw new InvalidOperationException("instance property declared on module.  Propreties should be declared as static, marked as PythonHidden, or you should use a PythonGlobal.");
                             }
@@ -217,7 +218,7 @@ public override bool TryGetValue(object key, out object value) {
                 return value != Uninitialized.Instance;
             }
 
-            if(key is string strKey) {
+            if (key is string strKey) {
                 return TryGetLazyValue(strKey, out value);
             }