Add String place-holder event type, public facing error message

items/src/numops.rs

@@ -1,5 +1,5 @@
 use crate::SubFrId;
-use num_traits::{AsPrimitive, Bounded, Float, Zero};
+use num_traits::{Bounded, Float, Zero};
 use serde::de::DeserializeOwned;
 use serde::{Deserialize, Serialize};
 use std::cmp::Ordering;
@@ -60,14 +60,64 @@ impl PartialOrd for BoolNum {
     }
 }
 
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct StringNum(pub String);
+
+impl StringNum {
+    pub const MIN: Self = Self(String::new());
+    pub const MAX: Self = Self(String::new());
+}
+
+impl Add<StringNum> for StringNum {
+    type Output = StringNum;
+
+    fn add(self, _rhs: StringNum) -> Self::Output {
+        todo!()
+    }
+}
+
+impl num_traits::Zero for StringNum {
+    fn zero() -> Self {
+        Self(String::new())
+    }
+
+    fn is_zero(&self) -> bool {
+        self.0.is_empty()
+    }
+}
+
+impl num_traits::Bounded for StringNum {
+    fn min_value() -> Self {
+        Self(String::new())
+    }
+
+    fn max_value() -> Self {
+        Self(String::new())
+    }
+}
+
+impl PartialEq for StringNum {
+    fn eq(&self, other: &Self) -> bool {
+        PartialEq::eq(&self.0, &other.0)
+    }
+}
+
+impl PartialOrd for StringNum {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        PartialOrd::partial_cmp(&self.0, &other.0)
+    }
+}
+
 pub trait NumOps:
     Sized
-    + Copy
+    //+ Copy
+    + Clone
+    + AsPrimF32
     + Send
     + Unpin
     + Debug
     + Zero
-    + AsPrimitive<f32>
+    //+ AsPrimitive<f32>
     + Bounded
     + PartialOrd
     + SubFrId
@@ -103,6 +153,44 @@ fn is_nan_float<T: Float>(x: &T) -> bool {
     x.is_nan()
 }
 
+pub trait AsPrimF32 {
+    fn as_prim_f32(&self) -> f32;
+}
+
+macro_rules! impl_as_prim_f32 {
+    ($ty:ident) => {
+        impl AsPrimF32 for $ty {
+            fn as_prim_f32(&self) -> f32 {
+                *self as f32
+            }
+        }
+    };
+}
+
+impl_as_prim_f32!(u8);
+impl_as_prim_f32!(u16);
+impl_as_prim_f32!(u32);
+impl_as_prim_f32!(u64);
+impl_as_prim_f32!(i8);
+impl_as_prim_f32!(i16);
+impl_as_prim_f32!(i32);
+impl_as_prim_f32!(i64);
+impl_as_prim_f32!(f32);
+impl_as_prim_f32!(f64);
+
+impl AsPrimF32 for BoolNum {
+    fn as_prim_f32(&self) -> f32 {
+        self.0 as f32
+    }
+}
+
+impl AsPrimF32 for StringNum {
+    fn as_prim_f32(&self) -> f32 {
+        netpod::log::error!("TODO impl AsPrimF32 for StringNum");
+        todo!()
+    }
+}
+
 impl_num_ops!(u8, MIN, MAX, is_nan_int);
 impl_num_ops!(u16, MIN, MAX, is_nan_int);
 impl_num_ops!(u32, MIN, MAX, is_nan_int);
@@ -114,3 +202,4 @@ impl_num_ops!(i64, MIN, MAX, is_nan_int);
 impl_num_ops!(f32, NAN, NAN, is_nan_float);
 impl_num_ops!(f64, NAN, NAN, is_nan_float);
 impl_num_ops!(BoolNum, MIN, MAX, is_nan_int);
+impl_num_ops!(StringNum, MIN, MAX, is_nan_int);