feat: add basic structures for EAV modeling (entity, attribute, value)

01.workspace/heave/src/fun/mod.rs

@@ -0,0 +1 @@
+

01.workspace/heave/src/imp/mod.rs

@@ -0,0 +1 @@
+

01.workspace/heave/src/lib.rs

@@ -6,3 +6,7 @@ mod mcr;
 mod str;
 mod trt;
 mod tst;
+
+pub use crate::str::attribute::O as Attribute;
+pub use crate::str::entity::O as Entity;
+pub use crate::str::value::E as Value;

01.workspace/heave/src/mcr/mod.rs

@@ -0,0 +1 @@
+

01.workspace/heave/src/str/attribute.rs

@@ -0,0 +1,7 @@
+use crate::*;
+
+#[derive(Debug, PartialEq, Clone)]
+pub struct O {
+    pub id: String,
+    pub value: Value,
+}

01.workspace/heave/src/str/entity.rs

@@ -0,0 +1,7 @@
+use crate::*;
+
+#[derive(Debug, Default, PartialEq, Clone)]
+pub struct O {
+    pub class: String,
+    pub attributes: std::collections::HashMap<String, Attribute>,
+}

01.workspace/heave/src/str/mod.rs

@@ -0,0 +1,3 @@
+pub mod attribute;
+pub mod entity;
+pub mod value;

01.workspace/heave/src/str/value.rs

@@ -0,0 +1,10 @@
+use crate::*;
+
+#[derive(Debug, PartialEq, PartialOrd, Clone)]
+pub enum E {
+    Bool(bool),
+    Real(f64),
+    SignedInt(i64),
+    Text(String),
+    UnsignedInt(u64),
+}

01.workspace/heave/src/trt/mod.rs

@@ -0,0 +1 @@
+

01.workspace/heave/src/tst/mod.rs

@@ -0,0 +1 @@
+