Support FILE* pointers (#195)

Author: barche

examples/types.cpp

@@ -481,6 +481,12 @@ JLCXX_MODULE define_julia_module(jlcxx::Module& types)
 
   types.method("neverempty_array", [] () { NeverEmpty n(1); return std::vector({n}); });
   types.method("neverempty_deque", [] () { NeverEmpty n(1); return std::deque({n}); });
+
+  // Note that when mixing compilers (e.g. MSVC and GCC) the FILE* must be manipulated only from
+  // within functions compiled with the same compiler. Passing between CRT results in errors.
+  types.method("makefptr", [] (const std::string& filename) { return fopen(filename.c_str(), "w"); });
+  types.method("writefptr", [] (FILE* fp) { fprintf(fp, "Hello world!"); });
+  types.method("closefptr", [] (FILE* fp) { fclose(fp); });
 }
 
 JLCXX_MODULE define_types2_module(jlcxx::Module& types2)

include/jlcxx/jlcxx_config.hpp

@@ -16,7 +16,7 @@
 
 #define JLCXX_VERSION_MAJOR 0
 #define JLCXX_VERSION_MINOR 14
-#define JLCXX_VERSION_PATCH 6
+#define JLCXX_VERSION_PATCH 7
 
 // From https://stackoverflow.com/questions/5459868/concatenate-int-to-string-using-c-preprocessor
 #define __JLCXX_STR_HELPER(x) #x

src/jlcxx.cpp

@@ -397,6 +397,8 @@ JLCXX_API void register_core_types()
 
     set_julia_type<jl_datatype_t*>(jl_any_type,false);
     set_julia_type<jl_value_t*>(jl_any_type,false);
+
+    set_julia_type<FILE*>((jl_datatype_t*)jl_apply_type1((jl_value_t*)jl_pointer_type, julia_type("FILE", "Libc")), false);
     registered = true;
   }
 }