Be more lenient with underscore fields and arguments.

2 files changed, 5 insertions, 2 deletions

diff --git a/src/compile/functions.c b/src/compile/functions.c
index abe0a588..e3dbc2e7 100644
--- a/src/compile/functions.c
+++ b/src/compile/functions.c
@@ -155,7 +155,8 @@ Text_t compile_function_call(env_t *env, ast_t *ast) {
         if (!is_valid_call(env, Match(fn_t, FunctionType)->args, call->args, (call_opts_t){.promotion = true})) {
             if (is_valid_call(env, Match(fn_t, FunctionType)->args, call->args,
                               (call_opts_t){.promotion = true, .underscores = true})) {
-                code_err(ast, "You can't pass underscore arguments to this function (those are private)");
+                code_err(ast, "You can't pass underscore arguments to this function as positional arguments. You must "
+                              "use keyword arguments.");
             } else {
                 arg_t *args = NULL;
                 for (arg_ast_t *a = call->args; a; a = a->next)
diff --git a/src/compile/structs.c b/src/compile/structs.c
index aaebef22..2e7217f6 100644
--- a/src/compile/structs.c
+++ b/src/compile/structs.c
@@ -127,7 +127,9 @@ Text_t compile_struct_literal(env_t *env, ast_t *ast, type_t *t, arg_ast_t *args
         return Texts("((", compile_type(t), "){", compile_arguments(env, ast, struct_->fields, args), "})");
     } else if (!constructor_opts.underscores
                && is_valid_call(env, struct_->fields, args, (call_opts_t){.promotion = true, .underscores = true})) {
-        code_err(ast, "This constructor uses private fields that are not exposed.");
+        code_err(ast, "This constructor is passing private fields (those starting with underscores) as positional "
+                      "arguments, which is not allowed. \n"
+                      " If you need to pass these fields, use a keyword argument.");
     }
     code_err(ast, "I could not find a constructor matching these arguments for the struct ", type_to_text(t));
 }