brk: first commit

_src/structs/map_value.rs

@@ -0,0 +1,35 @@
+use std::fmt::{Debug, Display};
+
+use allocative::Allocative;
+use bincode::{Decode, Encode};
+use serde::{de::DeserializeOwned, Serialize};
+
+use super::{Date, Height, Timestamp, OHLC};
+
+pub trait MapValue:
+    Clone
+    + Copy
+    + Default
+    + Debug
+    + Serialize
+    + DeserializeOwned
+    + Encode
+    + Decode
+    + Sync
+    + Send
+    + Allocative
+    + Display
+{
+}
+
+impl MapValue for u8 {}
+impl MapValue for u16 {}
+impl MapValue for u32 {}
+impl MapValue for u64 {}
+impl MapValue for usize {}
+impl MapValue for f32 {}
+impl MapValue for f64 {}
+impl MapValue for Date {}
+impl MapValue for OHLC {}
+impl MapValue for Height {}
+impl MapValue for Timestamp {}