Directly move functions instead of making methods

This keeps the original functions instead of ignoring them which helps when rearranging passes - in particular when the pass for symbols is involved.

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

src/Generator/Generators/CLI/CLIHeaders.cs

@@ -222,10 +222,13 @@ namespace CppSharp.Generators.CLI
         {
             PushBlock(BlockKind.FunctionsClass);
 
-            WriteLine("public ref class {0}", TranslationUnit.FileNameWithoutExtension);
-            WriteLine("{");
-            WriteLine("public:");
-            Indent();
+            if (!(decl is Class))
+            {
+                WriteLine("public ref class {0}", TranslationUnit.FileNameWithoutExtension);
+                WriteLine("{");
+                WriteLine("public:");
+                Indent();
+            }
 
             // Generate all the function declarations for the module.
             foreach (var function in decl.Functions)
@@ -233,8 +236,11 @@ namespace CppSharp.Generators.CLI
                 GenerateFunction(function);
             }
 
-            Unindent();
-            WriteLine("};");
+            if (!(decl is Class))
+            {
+                Unindent();
+                WriteLine("};");
+            }
 
             PopBlock(NewLineKind.BeforeNextBlock);
         }

src/Generator/Generators/CLI/CLISources.cs

@@ -889,11 +889,9 @@ namespace CppSharp.Generators.CLI
 
             GenerateDeclarationCommon(function);
 
-            var classSig = string.Format("{0}::{1}", QualifiedIdentifier(@namespace),
-                TranslationUnit.FileNameWithoutExtension);
-
-            Write("{0} {1}::{2}(", function.ReturnType, classSig,
-                function.Name);
+            Write($@"{function.ReturnType} {QualifiedIdentifier(@namespace)}::{
+                (@namespace is Class ? string.Empty : $@"{
+                    TranslationUnit.FileNameWithoutExtension}::")}{function.Name}(");
 
             for (var i = 0; i < function.Parameters.Count; ++i)
             {

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -239,15 +239,19 @@ namespace CppSharp.Generators.CSharp
 
         public virtual void GenerateNamespaceFunctionsAndVariables(DeclarationContext context)
         {
+            var hasGlobalFunctions = !(context is Class) && context.Functions.Any(
+                f => f.IsGenerated);
+
             var hasGlobalVariables = !(context is Class) && context.Variables.Any(
                 v => v.IsGenerated && v.Access == AccessSpecifier.Public);
 
-            if (!context.Functions.Any(f => f.IsGenerated) && !hasGlobalVariables)
+            if (!hasGlobalFunctions && !hasGlobalVariables)
                 return;
 
-            PushBlock(BlockKind.Functions);
             var parentName = SafeIdentifier(context.TranslationUnit.FileNameWithoutExtension);
 
+            PushBlock(BlockKind.Functions);
+
             var keyword = "class";
             var classes = EnumerateClasses().ToList();
             if (classes.FindAll(cls => cls.IsValueType && cls.Name == parentName && context.QualifiedLogicalName == cls.Namespace.QualifiedLogicalName).Any())
@@ -271,12 +275,8 @@ namespace CppSharp.Generators.CSharp
             UnindentAndWriteCloseBrace();
             PopBlock(NewLineKind.BeforeNextBlock);
 
-            foreach (var function in context.Functions)
-            {
-                if (!function.IsGenerated) continue;
-
+            foreach (Function function in context.Functions.Where(f => f.IsGenerated))
                 GenerateFunction(function, parentName);
-            }
 
             foreach (var variable in context.Variables.Where(
                 v => v.IsGenerated && v.Access == AccessSpecifier.Public))
@@ -443,7 +443,8 @@ namespace CppSharp.Generators.CSharp
             }
 
             GenerateClassConstructors(@class);
-
+            foreach (Function function in @class.Functions.Where(f => f.IsGenerated))
+                GenerateFunction(function, @class.Name);
             GenerateClassMethods(@class.Methods);
             GenerateClassVariables(@class);
             GenerateClassProperties(@class);
@@ -649,6 +650,10 @@ namespace CppSharp.Generators.CSharp
                     && !functions.Contains(prop.SetMethod))
                     tryAddOverload(prop.SetMethod);
             }
+
+            functions.AddRange(from function in @class.Functions
+                               where function.IsGenerated && !function.IsSynthetized
+                               select function);
         }
 
         private IEnumerable<string> GatherInternalParams(Function function, out TypePrinterResult retType)
@@ -2323,6 +2328,8 @@ namespace CppSharp.Generators.CSharp
 
             if (function.SynthKind == FunctionSynthKind.DefaultValueOverload)
                 GenerateOverloadCall(function);
+            else if (function.IsOperator)
+                GenerateOperator(function, default(QualifiedType));
             else
                 GenerateInternalFunctionCall(function);
 
@@ -2650,14 +2657,14 @@ namespace CppSharp.Generators.CSharp
             return delegateId;
         }
 
-        private void GenerateOperator(Method method, QualifiedType returnType)
+        private void GenerateOperator(Function function, QualifiedType returnType)
         {
-            if (method.SynthKind == FunctionSynthKind.ComplementOperator)
+            if (function.SynthKind == FunctionSynthKind.ComplementOperator)
             {
-                if (method.Kind == CXXMethodKind.Conversion)
+                if (function is Method method && method.Kind == CXXMethodKind.Conversion)
                 {
                     // To avoid ambiguity when having the multiple inheritance pass enabled
-                    var paramType = method.Parameters[0].Type.SkipPointerRefs().Desugar();
+                    var paramType = function.Parameters[0].Type.SkipPointerRefs().Desugar();
                     paramType = (paramType.GetPointee() ?? paramType).Desugar();
                     Class paramClass;
                     Class @interface = null;
@@ -2665,9 +2672,9 @@ namespace CppSharp.Generators.CSharp
                         @interface = paramClass.GetInterface();
 
                     var paramName = string.Format("{0}{1}",
-                        method.Parameters[0].Type.IsPrimitiveTypeConvertibleToRef() ?
+                        function.Parameters[0].Type.IsPrimitiveTypeConvertibleToRef() ?
                         "ref *" : string.Empty,
-                        method.Parameters[0].Name);
+                        function.Parameters[0].Name);
                     var printedType = method.ConversionType.Visit(TypePrinter);
                     if (@interface != null)
                     {
@@ -2679,30 +2686,45 @@ namespace CppSharp.Generators.CSharp
                 }
                 else
                 {
-                    var @operator = Operators.GetOperatorOverloadPair(method.OperatorKind);
+                    var @operator = Operators.GetOperatorOverloadPair(function.OperatorKind);
 
-                    WriteLine("return !({0} {1} {2});", method.Parameters[0].Name,
-                              @operator, method.Parameters[1].Name);
+                    // handle operators for comparison which return int instead of bool
+                    Type retType = function.OriginalReturnType.Type.Desugar();
+                    bool regular = retType.IsPrimitiveType(PrimitiveType.Bool);
+                    if (regular)
+                    {
+                        WriteLine($@"return !({function.Parameters[0].Name} {
+                            @operator} {function.Parameters[1].Name});");
+                    }
+                    else
+                    {
+                        WriteLine($@"return global::System.Convert.ToInt32(({
+                            function.Parameters[0].Name} {@operator} {
+                            function.Parameters[1].Name}) == 0);");
+                    }
                 }
                 return;
             }
 
-            if (method.OperatorKind == CXXOperatorKind.EqualEqual ||
-                method.OperatorKind == CXXOperatorKind.ExclaimEqual)
+            if (function.OperatorKind == CXXOperatorKind.EqualEqual ||
+                function.OperatorKind == CXXOperatorKind.ExclaimEqual)
             {
                 WriteLine("bool {0}Null = ReferenceEquals({0}, null);",
-                    method.Parameters[0].Name);
+                    function.Parameters[0].Name);
                 WriteLine("bool {0}Null = ReferenceEquals({0}, null);",
-                    method.Parameters[1].Name);
+                    function.Parameters[1].Name);
                 WriteLine("if ({0}Null || {1}Null)",
-                    method.Parameters[0].Name, method.Parameters[1].Name);
-                WriteLineIndent("return {0}{1}Null && {2}Null{3};",
-                    method.OperatorKind == CXXOperatorKind.EqualEqual ? string.Empty : "!(",
-                    method.Parameters[0].Name, method.Parameters[1].Name,
-                    method.OperatorKind == CXXOperatorKind.EqualEqual ? string.Empty : ")");
+                    function.Parameters[0].Name, function.Parameters[1].Name);
+                Type retType = function.OriginalReturnType.Type.Desugar();
+                bool regular = retType.IsPrimitiveType(PrimitiveType.Bool);
+                WriteLineIndent($@"return {(regular ? string.Empty : "global::System.Convert.ToInt32(")}{
+                    (function.OperatorKind == CXXOperatorKind.EqualEqual ? string.Empty : "!(")}{
+                    function.Parameters[0].Name}Null && {function.Parameters[1].Name}Null{
+                    (function.OperatorKind == CXXOperatorKind.EqualEqual ? string.Empty : ")")}{
+                    (regular ? string.Empty : ")")};");
             }
 
-            GenerateInternalFunctionCall(method, returnType: returnType);
+            GenerateInternalFunctionCall(function, returnType: returnType);
         }
 
         private void GenerateClassConstructor(Method method, Class @class)

src/Generator/Passes/CheckOperatorsOverloads.cs

@@ -1,4 +1,5 @@
-using System.Linq;
+using System.Collections.Generic;
+using System.Linq;
 using CppSharp.AST;
 using CppSharp.AST.Extensions;
 using CppSharp.Generators;
@@ -65,6 +66,15 @@ namespace CppSharp.Passes
                 else
                     CreateOperator(@class, @operator);
             }
+
+            foreach (var @operator in @class.Functions.Where(
+                f => f.IsGenerated && f.IsOperator &&
+                    !IsValidOperatorOverload(f) && !f.IsExplicitlyGenerated))
+            {
+                Diagnostics.Debug("Invalid operator overload {0}::{1}",
+                    @class.OriginalName, @operator.OperatorKind);
+                @operator.ExplicitlyIgnore();
+            }
         }
 
         private static void CreateOperator(Class @class, Method @operator)
@@ -128,64 +138,85 @@ namespace CppSharp.Passes
             @operator.GenerationKind = GenerationKind.Internal;
         }
 
-        private static void HandleMissingOperatorOverloadPair(Class @class, CXXOperatorKind op1,
-            CXXOperatorKind op2)
+        private static void HandleMissingOperatorOverloadPair(Class @class,
+            CXXOperatorKind op1, CXXOperatorKind op2)
         {
-            foreach (var op in @class.Operators.Where(
+            List<Method> methods = HandleMissingOperatorOverloadPair(
+                @class, @class.Operators, op1, op2);
+            foreach (Method @operator in methods)
+            {
+                int index = @class.Methods.IndexOf(
+                    (Method) @operator.OriginalFunction);
+                @class.Methods.Insert(index, @operator);
+            }
+
+            List<Function> functions = HandleMissingOperatorOverloadPair(
+                @class, @class.Functions, op1, op2);
+            foreach (Method @operator in functions)
+            {
+                int index = @class.Declarations.IndexOf(
+                    @operator.OriginalFunction);
+                @class.Methods.Insert(index, @operator);
+            }
+        }
+
+        private static List<T> HandleMissingOperatorOverloadPair<T>(Class @class,
+            IEnumerable<T> functions, CXXOperatorKind op1,
+            CXXOperatorKind op2) where T : Function, new()
+        {
+            List<T> fs = new List<T>();
+            foreach (var op in functions.Where(
                 o => o.OperatorKind == op1 || o.OperatorKind == op2).ToList())
             {
-                int index;
-                var missingKind = CheckMissingOperatorOverloadPair(@class, out index, op1, op2,
-                    op.Parameters.First().Type, op.Parameters.Last().Type);
+                var missingKind = CheckMissingOperatorOverloadPair(functions,
+                    op1, op2, op.Parameters.First().Type, op.Parameters.Last().Type);
 
                 if (missingKind == CXXOperatorKind.None || !op.IsGenerated)
                     continue;
 
-                var method = new Method()
-                    {
-                        Name = Operators.GetOperatorIdentifier(missingKind),
-                        Namespace = @class,
-                        SynthKind = FunctionSynthKind.ComplementOperator,
-                        Kind = CXXMethodKind.Operator,
-                        OperatorKind = missingKind,
-                        ReturnType = op.ReturnType
-                    };
-
-                method.Parameters.AddRange(op.Parameters.Select(
-                    p => new Parameter(p) { Namespace = method }));
-
-                @class.Methods.Insert(index, method);
+                var function = new T()
+                {
+                    Name = Operators.GetOperatorIdentifier(missingKind),
+                    Namespace = @class,
+                    SynthKind = FunctionSynthKind.ComplementOperator,
+                    OperatorKind = missingKind,
+                    ReturnType = op.ReturnType,
+                    OriginalFunction = op
+                };
+
+                var method = function as Method;
+                if (method != null)
+                    method.Kind = CXXMethodKind.Operator;
+
+                function.Parameters.AddRange(op.Parameters.Select(
+                    p => new Parameter(p) { Namespace = function }));
+
+                fs.Add(function);
             }
+            return fs;
         }
-
-        static CXXOperatorKind CheckMissingOperatorOverloadPair(Class @class, out int index,
-            CXXOperatorKind op1, CXXOperatorKind op2, Type typeLeft, Type typeRight)
+        
+        private static CXXOperatorKind CheckMissingOperatorOverloadPair(
+            IEnumerable<Function> functions,
+            CXXOperatorKind op1, CXXOperatorKind op2,
+            Type typeLeft, Type typeRight)
         {
-            var first = @class.Operators.FirstOrDefault(o => o.IsGenerated && o.OperatorKind == op1 &&
-                o.Parameters.First().Type.Equals(typeLeft) && o.Parameters.Last().Type.Equals(typeRight));
-            var second = @class.Operators.FirstOrDefault(o => o.IsGenerated && o.OperatorKind == op2 &&
-                o.Parameters.First().Type.Equals(typeLeft) && o.Parameters.Last().Type.Equals(typeRight));
+            var first = functions.FirstOrDefault(
+                o => o.IsGenerated && o.OperatorKind == op1 &&
+                    o.Parameters.First().Type.Equals(typeLeft) &&
+                    o.Parameters.Last().Type.Equals(typeRight));
+            var second = functions.FirstOrDefault(
+                o => o.IsGenerated && o.OperatorKind == op2 &&
+                    o.Parameters.First().Type.Equals(typeLeft) &&
+                    o.Parameters.Last().Type.Equals(typeRight));
 
             var hasFirst = first != null;
             var hasSecond = second != null;
 
-            if (hasFirst && !hasSecond)
-            {
-                index = @class.Methods.IndexOf(first);
-                return op2;
-            }
-
-            if (hasSecond && !hasFirst)
-            {
-                index = @class.Methods.IndexOf(second);
-                return op1;
-            }
-
-            index = 0;
-            return CXXOperatorKind.None;
+            return hasFirst && !hasSecond ? op2 : hasSecond && !hasFirst ? op1 : CXXOperatorKind.None;
         }
 
-        private bool IsValidOperatorOverload(Method @operator)
+        private bool IsValidOperatorOverload(Function @operator)
         {
             // These follow the order described in MSDN (Overloadable Operators).
 

src/Generator/Passes/MoveFunctionToClassPass.cs

@@ -1,4 +1,5 @@
-using System.Linq;
+using System.Collections.Generic;
+using System.Linq;
 using CppSharp.AST;
 
 namespace CppSharp.Passes
@@ -17,6 +18,14 @@ namespace CppSharp.Passes
             VisitOptions.VisitTemplateArguments = false;
         }
 
+        public override bool VisitASTContext(ASTContext context)
+        {
+            bool result = base.VisitASTContext(context);
+            foreach (Function movedFunction in movedFunctions)
+                movedFunction.OriginalNamespace.Declarations.Remove(movedFunction);
+            return result;
+        }
+
         public override bool VisitFunctionDecl(Function function)
         {
             if (!function.IsGenerated)
@@ -28,23 +37,9 @@ namespace CppSharp.Passes
                 @class.TranslationUnit.Module != function.TranslationUnit.Module)
                 return false;
 
-            // Create a new fake method so it acts as a static method.
-            var method = new Method(function)
-            {
-                Namespace = @class,
-                OperatorKind = function.OperatorKind,
-                OriginalFunction = null,
-                IsStatic = true
-            };
-            if (method.IsOperator)
-            {
-                method.IsNonMemberOperator = true;
-                method.Kind = CXXMethodKind.Operator;
-            }
-
-            function.ExplicitlyIgnore();
-
-            @class.Methods.Add(method);
+            function.Namespace = @class;
+            @class.Declarations.Add(function);
+            movedFunctions.Add(function);
 
             Diagnostics.Debug($"Function {function.Name} moved to class {@class.Name}");
 
@@ -76,5 +71,7 @@ namespace CppSharp.Passes
 
             return @class;
         }
+
+        private HashSet<Function> movedFunctions = new HashSet<Function>();
     }
 }