Removed default parameters when they use ignored declarations.

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

src/Generator/Passes/HandleDefaultParamValuesPass.cs

@@ -47,7 +47,10 @@ namespace CppSharp.Passes
                 var result = parameter.DefaultArgument.String;
                 if (PrintExpression(parameter.Type, parameter.DefaultArgument, ref result) == null)
                     overloadIndices.Add(function.Parameters.IndexOf(parameter));
-                parameter.DefaultArgument.String = result;
+                if (string.IsNullOrEmpty(result))
+                    parameter.DefaultArgument = null;
+                else
+                    parameter.DefaultArgument.String = result;
             }
 
             GenerateOverloads(function, overloadIndices);
@@ -70,7 +73,14 @@ namespace CppSharp.Passes
                 return true;
 
             if (expression.Class == StatementClass.Call)
-                return expression.Declaration.Ignore ? false : (bool?) null;
+            {
+                if (expression.Declaration.Ignore)
+                {
+                    result = null;
+                    return false;
+                }
+                return null;
+            }
 
             var defaultConstruct = CheckForDefaultConstruct(desugared, expression, ref result);
             if (defaultConstruct != false)

tests/CSharp/CSharp.Tests.cs

@@ -216,6 +216,7 @@ public unsafe class CSharpTests : GeneratorTestFixture
             methodsWithDefaultValues.DefaultWithEnumInLowerCasedNameSpace();
             methodsWithDefaultValues.DefaultWithCharFromInt();
             methodsWithDefaultValues.DefaultWithFreeConstantInNameSpace();
+            methodsWithDefaultValues.DefaultWithStdNumericLimits(5);
         }
     }
 

tests/CSharp/CSharp.cpp

@@ -591,6 +591,10 @@ void MethodsWithDefaultValues::defaultWithFreeConstantInNameSpace(int c)
 {
 }
 
+void MethodsWithDefaultValues::defaultWithStdNumericLimits(int i)
+{
+}
+
 int MethodsWithDefaultValues::getA()
 {
     return m_foo.A;

tests/CSharp/CSharp.h

@@ -413,6 +413,7 @@ public:
     void defaultWithEnumInLowerCasedNameSpace(lowerCaseNameSpace::Enum e = lowerCaseNameSpace::Enum::Item2);
     void defaultWithCharFromInt(char c = 32);
     void defaultWithFreeConstantInNameSpace(int c = HasFreeConstant::FREE_CONSTANT_IN_NAMESPACE);
+    void defaultWithStdNumericLimits(int i = std::numeric_limits<double>::infinity());
     int getA();
 private:
     Foo m_foo;