doc: Expose the enum documentation

Author: dandxy89

src/model/sos.rs

@@ -12,7 +12,9 @@ use crate::{
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 #[cfg_attr(feature = "diff", derive(diff::Diff), diff(attr(#[derive(Debug, Eq, PartialEq, serde::Serialize, serde::Deserialize)])))]
 pub enum SOSClass {
+    /// Special Ordered Sets of type 1 (SOS1 or S1)
     S1,
+    /// Special Ordered Sets of type 2 (SOS2 or S2)
     S2,
 }
 

src/model/variable.rs

@@ -9,20 +9,20 @@ use crate::Rule;
 pub enum Variable {
     /// Unbounded variable (-Infinity, +Infinity)
     Free,
-    // Lower bounded variable
+    /// Lower bounded variable
     LB(f64),
-    // Upper bounded variable
+    /// Upper bounded variable
     UB(f64),
-    // Bounded variable
+    /// Bounded variable
     Bounded(f64, f64, bool),
-    // Integer variable [0, 1]
+    /// Integer variable [0, 1]
     Integer,
-    // Binary variable
+    /// Binary variable
     Binary,
     #[default]
-    // General variable [0, +Infinity]
+    /// General variable [0, +Infinity]
     General,
-    // Semi-continuous
+    /// Semi-continuous
     SemiContinuous,
 }