Compile time error, if there are zero or one features available

CHANGELOG.md

@@ -0,0 +1,17 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## 0.1.0 (2024-02-05)
+
+### Changed
+
+- Compile time error, if there are zero or one features in `exactly_one_of!` and `none_or_one_of!` macros. They were ignored before.
+
+## 0.0.3 (2023-11-09)
+
+### Added
+
+- It's the initial release! 🎉

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mutually_exclusive_features"
-version = "0.0.3"
+version = "0.1.0"
 description = "Macros to check that only none or one of a set of features is enabled at a time, as known as mutually exclusive features"
 license = "MIT OR Apache-2.0"
 authors = ["Omid Rad <[email protected]>"]

examples/src/main.rs

@@ -3,8 +3,6 @@ use mutually_exclusive_features::{exactly_one_of, none_or_one_of};
 fn main() {
     none_or_one_of!("a", "b", "c");
     none_or_one_of!("a", "b",);
-    none_or_one_of!("a");
-    none_or_one_of!();
 
     exactly_one_of!("a", "b", "c");
-}
+}

src/lib.rs

@@ -51,8 +51,12 @@ macro_rules! none_or_one_of {
     };
 
     // ignore cases
-    () => {};
-    (@recurs: [params: $F1:literal,]) => {};
+    () => {
+        compile_error!("It doesn't make sense to call it with no feature! Probably you can safely remove it.")
+    };
+    (@recurs: [params: $F1:literal,]) => {
+        compile_error!("It doesn't make sense to call it with only one feature! Probably you can safely remove it.")
+    };
 }
 
 /**