Rename LibrarySymbolInfo to CSharpLibrarySymbolTable and improve it a bit

src/Generator/Generators/CSharp/CSharpLibrarySymbolTable.cs

@@ -0,0 +1,88 @@
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
+
+namespace CppSharp.Generators.CSharp
+{
+    internal class CSharpLibrarySymbolTable : TextGenerator
+    {
+        private static readonly Regex identifierCleanerRegex = new(@"[^\w]", RegexOptions.Compiled);
+        private readonly Dictionary<string, string> symbols = new();
+        private readonly HashSet<string> uniqueVariableNames = new();
+        private readonly string path = string.Empty;
+        private readonly string @namespace = string.Empty;
+        private readonly string @class;
+        private int counter = 0;
+
+        public CSharpLibrarySymbolTable(string path, string @namespace)
+        {
+            this.path = path;
+            @class = identifierCleanerRegex.Replace(path, "_");
+            this.@namespace = (!string.IsNullOrEmpty(@namespace) ? @namespace : @class) + ".__Symbols";
+        }
+
+        public string Generate()
+        {
+            using (WriteBlock($"namespace {@namespace}"))
+            {
+                using (WriteBlock($"internal class {@class}"))
+                {
+                    GenerateStaticVariables();
+
+                    using (WriteBlock($"static {@class}()"))
+                        GenerateStaticConstructorBody();
+                }
+            }
+
+            return ToString();
+        }
+
+        public void GenerateStaticVariables()
+        {
+            foreach (var symbol in symbols)
+            {
+                var variableIdentifier = symbol.Value;
+                WriteLine($"public static IntPtr {variableIdentifier} {{ get; }}");
+            }
+        }
+
+        public void GenerateStaticConstructorBody()
+        {
+            WriteLine($"var path = \"{path}\";");
+            WriteLine("var image = CppSharp.SymbolResolver.LoadImage(ref path);");
+            WriteLine("if (image == IntPtr.Zero) throw new global::System.DllNotFoundException(path);");
+
+            foreach (var symbol in symbols)
+            {
+                var mangled = symbol.Key;
+                var variableIdentifier = symbol.Value;
+                WriteLine($"{variableIdentifier} = CppSharp.SymbolResolver.ResolveSymbol(image, \"{mangled}\");");
+            }
+        }
+
+        public string GetFullVariablePath(string mangled)
+        {
+            return $"global::{@namespace}.{@class}." + GenerateUniqueVariableIdentifier(mangled);
+        }
+
+        public string GenerateUniqueVariableIdentifier(string mangled)
+        {
+            if (!symbols.TryGetValue(mangled, out string result))
+            {
+                result = identifierCleanerRegex.Replace(mangled, "_");
+                if (!result.StartsWith("_"))
+                    result = "_" + result;
+
+                if (!uniqueVariableNames.Add(result))
+                {
+                    result += "_v";
+                    while (!uniqueVariableNames.Add(result))
+                        result += counter++;
+                }
+
+                symbols[mangled] = result;
+            }
+
+            return result;
+        }
+    }
+}

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -22,7 +22,7 @@ namespace CppSharp.Generators.CSharp
         public CSharpTypePrinter TypePrinter { get; set; }
         public CSharpExpressionPrinter ExpressionPrinter { get; protected set; }
 
-        Dictionary<string, LibrarySymbolInfo> LibrarySymbols = new Dictionary<string, LibrarySymbolInfo>();
+        internal Dictionary<string, CSharpLibrarySymbolTable> LibrarySymbolTables { get; } = new();
 
         public override string FileExtension => "cs";
 
@@ -100,7 +100,7 @@ namespace CppSharp.Generators.CSharp
                 PopBlock(NewLineKind.BeforeNextBlock);
             }
 
-            foreach (var lib in LibrarySymbols)
+            foreach (var lib in LibrarySymbolTables)
                 WriteLine(lib.Value.Generate());
 
             GenerateExternalClassTemplateSpecializations();
@@ -1005,8 +1005,8 @@ internal static bool {Helpers.TryGetNativeToManagedMappingIdentifier}(IntPtr nat
 
             var libraryPath = GetLibraryOf(var);
 
-            if (!LibrarySymbols.TryGetValue(libraryPath, out var lib))
-                LibrarySymbols[libraryPath] = lib = new LibrarySymbolInfo(libraryPath, Module.OutputNamespace);
+            if (!LibrarySymbolTables.TryGetValue(libraryPath, out var lib))
+                LibrarySymbolTables[libraryPath] = lib = new CSharpLibrarySymbolTable(libraryPath, Module.OutputNamespace);
 
             var location = lib.GetFullVariablePath(var.Mangled);
 
@@ -3609,94 +3609,5 @@ internal static{(@new ? " new" : string.Empty)} {printedClass} __GetInstance({Ty
                 return obj.Type.Desugar().GetHashCode();
             }
         }
-
-        class LibrarySymbolInfo : TextGenerator
-        {
-            private static readonly Regex identifierCleanerRegex = new Regex(@"[^\w]", RegexOptions.Compiled);
-            private Dictionary<string, string> symbols = new Dictionary<string, string>();
-            private HashSet<string> uniqueVariableNames = new HashSet<string>();
-            private string path = "";
-            private int counter = 0;
-            private string @class;
-            private string @namespace = "";
-
-            public LibrarySymbolInfo(string path, string @namespace)
-            {
-                this.path = path;
-                @class = identifierCleanerRegex.Replace(path, "_");
-                this.@namespace = (!string.IsNullOrEmpty(@namespace) ? @namespace : @class) + ".__Symbols";
-            }
-
-            public string Generate()
-            {
-                WriteLine($"namespace {@namespace}");
-                {
-                    WriteOpenBraceAndIndent();
-                    WriteLine($"internal class {@class}");
-                    {
-                        WriteOpenBraceAndIndent();
-                        GenerateStaticVariables();
-                        WriteLine($"static {@class}()");
-                        {
-                            WriteOpenBraceAndIndent();
-                            GenerateStaticConstructorBody();
-                            UnindentAndWriteCloseBrace();
-                        }
-                        UnindentAndWriteCloseBrace();
-                    }
-                    UnindentAndWriteCloseBrace();
-                }
-                return ToString();
-            }
-
-            public void GenerateStaticVariables()
-            {
-                foreach (var symbol in symbols)
-                {
-                    var variableIdentifier = symbol.Value;
-                    WriteLine($"public static IntPtr {variableIdentifier} {{ get; }}");
-                }
-            }
-
-            public void GenerateStaticConstructorBody()
-            {
-                WriteLine($"var path = \"{path}\";");
-                WriteLine("var image = CppSharp.SymbolResolver.LoadImage(ref path);");
-                WriteLine("if (image == IntPtr.Zero) throw new global::System.DllNotFoundException(path);");
-
-                foreach (var symbol in symbols)
-                {
-                    var mangled = symbol.Key;
-                    var variableIdentifier = symbol.Value;
-                    WriteLine($"{variableIdentifier} = CppSharp.SymbolResolver.ResolveSymbol(image, \"{mangled}\");");
-                }
-            }
-
-            public string GetFullVariablePath(string mangled)
-            {
-                return $"global::{@namespace}.{@class}." + GenerateUniqueVariableIdentifier(mangled);
-            }
-
-            public string GenerateUniqueVariableIdentifier(string mangled)
-            {
-                if (!symbols.TryGetValue(mangled, out string result))
-                {
-                    result = identifierCleanerRegex.Replace(mangled, "_");
-                    if (!result.StartsWith("_"))
-                        result = "_" + result;
-
-                    if (!uniqueVariableNames.Add(result))
-                    {
-                        result += "_v";
-                        while (!uniqueVariableNames.Add(result))
-                            result += counter++;
-                    }
-
-                    symbols[mangled] = result;
-                }
-
-                return result;
-            }
-        }
     }
 }

src/Generator/Utils/TextGenerator.cs

@@ -76,6 +76,18 @@ namespace CppSharp
             Unindent();
         }
 
+        internal TextBlock WriteBlock(string msg)
+        {
+            WriteLine(msg);
+            WriteOpenBraceAndIndent();
+            return new TextBlock(this);
+        }
+
+        internal TextBlock WriteBlock((BlockKind kind, string msg) info)
+        {
+            return WriteBlock(info.msg);
+        }
+
         public void NewLine()
         {
             StringBuilder.AppendLine(string.Empty);
@@ -132,4 +144,19 @@ namespace CppSharp
             return tg.ToString();
         }
     }
+
+    internal ref struct TextBlock
+    {
+        private readonly ITextGenerator generator;
+
+        public TextBlock(ITextGenerator generator)
+        {
+            this.generator = generator;
+        }
+
+        public void Dispose()
+        {
+            generator.UnindentAndWriteCloseBrace();
+        }
+    }
 }