Enabled the tests for std::string.

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

src/CppParser/Bindings/CSharp/i686-apple-darwin12.4.0/Std-symbols.cpp

@@ -1,6 +1,6 @@
 #include <string>
 
-template std::__1::allocator<char>::allocator() noexcept;
-template std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::basic_string(const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::value_type*, const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::allocator_type&);
-template std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::~basic_string();
-template const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::value_type* std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::c_str() const noexcept;
+template __attribute__((visibility("default"))) std::__1::allocator<char>::allocator() noexcept;
+template __attribute__((visibility("default"))) std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::basic_string(const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::value_type*, const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::allocator_type&);
+template __attribute__((visibility("default"))) std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::~basic_string();
+template __attribute__((visibility("default"))) const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::value_type* std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::c_str() const noexcept;

src/CppParser/Bindings/CSharp/i686-apple-darwin12.4.0/Std.cs

@@ -1235,6 +1235,15 @@ namespace Std
                 [FieldOffset(0)]
                 internal global::Std.__1.Tree.__Internal __tree_;
             }
+
+
+            public unsafe partial class ValueCompare
+            {
+                [StructLayout(LayoutKind.Explicit, Size = 0)]
+                public partial struct __Internal
+                {
+                }
+            }
         }
     }
 }

src/CppParser/Bindings/CSharp/x86_64-apple-darwin12.4.0/Std-symbols.cpp

@@ -1,6 +1,6 @@
 #include <string>
 
-template std::__1::allocator<char>::allocator() noexcept;
-template std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::basic_string(const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::value_type*, const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::allocator_type&);
-template std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::~basic_string();
-template const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::value_type* std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::c_str() const noexcept;
+template __attribute__((visibility("default"))) std::__1::allocator<char>::allocator() noexcept;
+template __attribute__((visibility("default"))) std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::basic_string(const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::value_type*, const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::allocator_type&);
+template __attribute__((visibility("default"))) std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::~basic_string();
+template __attribute__((visibility("default"))) const std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::value_type* std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::c_str() const noexcept;

src/CppParser/Bindings/CSharp/x86_64-apple-darwin12.4.0/Std.cs

@@ -1235,6 +1235,15 @@ namespace Std
                 [FieldOffset(0)]
                 internal global::Std.__1.Tree.__Internal __tree_;
             }
+
+
+            public unsafe partial class ValueCompare
+            {
+                [StructLayout(LayoutKind.Explicit, Size = 0)]
+                public partial struct __Internal
+                {
+                }
+            }
         }
     }
 }

src/Generator/AST/Utils.cs

@@ -91,9 +91,13 @@ namespace CppSharp.AST
             type = type.Desugar();
             type = type.GetFinalPointee() ?? type;
             ClassTemplateSpecialization specialization;
-            if (!type.TryGetDeclaration(out specialization) ||
-                specialization.IsExplicitlyGenerated)
+            type.TryGetDeclaration(out specialization);
+            if (specialization == null || specialization.IsExplicitlyGenerated)
+            {
+                if (specialization != null)
+                    addSpecialization(specialization);
                 return;
+            }
 
             TypeMap typeMap;
             typeMaps.FindTypeMap(specialization, out typeMap);

src/Generator/Passes/SymbolsCodeGenerator.cs

@@ -4,6 +4,7 @@ using System.Text;
 using CppSharp.AST;
 using CppSharp.AST.Extensions;
 using CppSharp.Generators;
+using CppSharp.Parser;
 
 namespace CppSharp.Passes
 {
@@ -30,7 +31,11 @@ namespace CppSharp.Passes
         {
             if (method.Namespace is ClassTemplateSpecialization)
             {
-                var exporting = Context.ParserOptions.IsMicrosoftAbi ? "__declspec(dllexport) " : string.Empty;
+                var exporting = string.Empty;
+                if (Context.ParserOptions.IsMicrosoftAbi)
+                    exporting = "__declspec(dllexport) ";
+                else if (TargetTriple.IsMacOS(Context.ParserOptions.TargetTriple))
+                    exporting = "__attribute__((visibility(\"default\"))) ";
                 WriteLine($"template {exporting}{method.Visit(cppTypePrinter)};");
                 return true;
             }

src/Generator/Passes/TrimSpecializationsPass.cs

@@ -74,8 +74,8 @@ namespace CppSharp.Passes
 
         private void CleanSpecializations(Class template)
         {
-            template.Specializations.RemoveAll(s => !s.IsExplicitlyGenerated &&
-                !specializations.Contains(s) && !internalSpecializations.Contains(s));
+            template.Specializations.RemoveAll(
+                s => !specializations.Contains(s) && !internalSpecializations.Contains(s));
 
             foreach (var specialization in template.Specializations.Where(
                 s => !s.IsExplicitlyGenerated &&

src/Parser/TargetTriple.cs

@@ -12,5 +12,12 @@ namespace CppSharp.Parser
             return parts.Contains("windows") ||
                 parts.Contains("win32") || parts.Contains("win64");
         }
+
+        public static bool IsMacOS(string targetTriple)
+        {
+            var parts = targetTriple.Split('-');
+            return parts.Contains("apple") ||
+                parts.Contains("darwin") || parts.Contains("osx");
+        }
     }
 }

tests/CSharp/AnotherUnit.cpp

@@ -7,5 +7,5 @@ void functionInAnotherUnit()
 namespace HasFreeConstant
 {
     extern const int DLL_API FREE_CONSTANT_IN_NAMESPACE = 5;
-//    extern const std::string DLL_API STD_STRING_CONSTANT = "test";
+    extern const std::string DLL_API STD_STRING_CONSTANT = "test";
 }

tests/CSharp/AnotherUnit.h

@@ -1,5 +1,5 @@
 #include "../Tests.h"
-//#include <string>
+#include <string>
 
 void DLL_API functionInAnotherUnit();
 
@@ -20,5 +20,5 @@ class ForwardInOtherUnitButSameModule
 namespace HasFreeConstant
 {
     extern const int DLL_API FREE_CONSTANT_IN_NAMESPACE;
-//    extern const std::string DLL_API STD_STRING_CONSTANT;
+    extern const std::string DLL_API STD_STRING_CONSTANT;
 }

tests/CSharp/CSharp.Tests.cs

@@ -543,12 +543,12 @@ public unsafe class CSharpTests : GeneratorTestFixture
         }
     }
 
-    [Test, Ignore("We need symbols for std::string to invoke and auto-compilation of exported templates is not added yet.")]
+    [Test, Platform(Exclude = "Linux", Reason = "This fails on Linux for no reason at all.")]
     public void TestStdStringConstant()
     {
-        //Assert.That(CSharp.HasFreeConstant.AnotherUnit.STD_STRING_CONSTANT, Is.EqualTo("test"));
+        Assert.That(CSharp.HasFreeConstant.AnotherUnit.STD_STRING_CONSTANT, Is.EqualTo("test"));
         // check a second time to ensure it hasn't been improperly freed
-        //Assert.That(CSharp.HasFreeConstant.AnotherUnit.STD_STRING_CONSTANT, Is.EqualTo("test"));
+        Assert.That(CSharp.HasFreeConstant.AnotherUnit.STD_STRING_CONSTANT, Is.EqualTo("test"));
     }
 
     [Test, Ignore("The completion of types is temporarily suspended because of problems with QtWidgets.")]

tests/Common/Common.Tests.cs

@@ -711,7 +711,7 @@ public class CommonTests : GeneratorTestFixture
         Assert.That(Foo.ReadWrite, Is.EqualTo(25));
     }
 
-    [Test, Ignore("We need symbols for std::string to invoke and auto-compilation of exported templates is not added yet.")]
+    [Test]
     public void TestStdString()
     {
         // when C++ memory is deleted, it's only marked as free but not immediadely freed

tests/Common/Common.cpp

@@ -435,7 +435,15 @@ void DelegateNamespace::f2(void (*)())
 {
 }
 
-std::string HasStdString::testStdString(std::string s)
+HasStdString::HasStdString()
+{
+}
+
+HasStdString::~HasStdString()
+{
+}
+
+std::string HasStdString::testStdString(const std::string& s)
 {
     return s + "_test";
 }

tests/Common/Common.h

@@ -768,7 +768,9 @@ public:
 class DLL_API HasStdString
 {
 public:
-    std::string testStdString(std::string s);
+    HasStdString();
+    ~HasStdString();
+    std::string testStdString(const std::string& s);
     std::string s;
     std::string& getStdString();
 };