tools: better error printing

1 files changed, 21 insertions, 0 deletions

diff --git a/modules/tools/c++/c_gen_iface.hpp b/modules/tools/c++/c_gen_iface.hpp
index a5d1de6..8bd702b 100644
--- a/modules/tools/c++/c_gen_iface.hpp
+++ b/modules/tools/c++/c_gen_iface.hpp
@@ -482,6 +482,27 @@ struct lang_bind<schema::Function<Input, Output>, binding::SyncC> {
 				return eov;
 			}
 		}
+		/**
+		 * Source
+		 */
+		{
+			auto eov = append_function_def(src, cfg, state, f_name);
+			if(eov.is_error()){
+				return eov;
+			}
+		}
+		{
+			auto eov = lang_bind_helper::append_string(src, "{\n\tif(!input) return -1;\n\tif(!output) return -1;\n\t");
+			if(eov.is_error()){
+				return eov;
+			}
+		}
+		{
+			auto eov = lang_bind_helper::append_string(src, "return 0;\n}\n\n");
+			if(eov.is_error()){
+				return eov;
+			}
+		}
 
 		return void_t{};
 	}