Move return_statement to function.hpp

libs/ast/include/pslang/ast/function.hpp

@@ -28,6 +28,14 @@ namespace pslang::ast
 		ast::location location;
 	};
 
+	struct return_statement
+	{
+		// can be null, which means "return unit"
+		expression_ptr value;
+		ast::location location;
+		std::size_t level = 0;
+	};
+
 	struct function_call
 	{
 		expression_ptr function;

libs/ast/include/pslang/ast/statement.hpp

@@ -30,14 +30,6 @@ namespace pslang::ast
 		ast::location location;
 	};
 
-	struct return_statement
-	{
-		// can be null, which means "return unit"
-		expression_ptr value;
-		ast::location location;
-		std::size_t level = 0;
-	};
-
 	using statement_impl = std::variant<
 		expression_ptr,
 		assignment,