feat: error for invalid operations on signals

argus-core/src/lib.rs

@@ -17,6 +17,9 @@ pub enum Error {
          ({current_sample:?})"
     )]
     NonMonotonicSignal { end_time: Duration, current_sample: Duration },
+
+    #[error("invalid operation due to bad type")]
+    InvalidOperation,
 }
 
 pub type ArgusError = Error;

argus-core/src/signals.rs

@@ -26,6 +26,7 @@ use self::traits::{BaseSignal, LinearInterpolatable};
 use crate::{ArgusResult, Error};
 
 /// All supported signal types in Argus
+#[derive(Debug, Clone, derive_more::From)]
 pub enum AnySignal {
     Bool(Signal<bool>),
     ConstBool(ConstantSignal<bool>),