1 files changed, 14 insertions, 5 deletions

diff --git a/src/ctor.h b/src/ctor.h
index f145eef..dddc5ef 100644
--- a/src/ctor.h
+++ b/src/ctor.h
@@ -282,10 +282,17 @@ struct settings
 };
 
 struct build_configuration;
-using GeneratorCb = std::function<int(const std::string& input,
-                                      const std::string& output,
-                                      const build_configuration& config,
-                                      const ctor::settings& settings)>;
+using GeneratorOneToOne =
+	std::function<int(const std::string& input,
+	                  const std::string& output,
+	                  const build_configuration& config,
+	                  const ctor::settings& settings)>;
+
+using GeneratorManyToOne =
+	std::function<int(const std::vector<std::string>& input,
+	                  const std::string& output,
+	                  const ctor::build_configuration& config,
+	                  const ctor::settings& settings)>;
 
 struct build_configuration
 {
@@ -297,7 +304,9 @@ struct build_configuration
 	std::vector<std::string> depends; // internal target dependencies
 	ctor::flags flags;
 	std::vector<std::string> externals; // externals used by this configuration
-	GeneratorCb function;
+	std::variant<std::monostate,
+	             GeneratorOneToOne,
+	             GeneratorManyToOne> function;
 };
 
 using build_configurations = std::vector<build_configuration>;