max_capacity() added

lib include reorder

src/bitset.rs

@@ -1,7 +1,7 @@
 use std::mem::{ManuallyDrop, MaybeUninit};
 use crate::{assume, BitSetBase, internals};
 use crate::bitset_interface::{LevelMasks, LevelMasksIterExt};
-use crate::config::{Config};
+use crate::config::Config;
 use crate::block::Block;
 use crate::raw;
 
@@ -47,7 +47,13 @@ impl<Conf: Config> BitSet<Conf> {
     #[inline]
     pub fn new() -> Self{
         Default::default()
-    }    
+    }
+
+    /// Max usize, container with this `Conf` can hold.
+    #[inline]
+    pub const fn max_capacity() -> usize {
+        RawBitSet::<Conf>::max_capacity()
+    }
 
     /// # Safety
     ///

src/lib.rs

@@ -165,20 +165,21 @@ mod level;
 mod bit_block;
 mod bit_queue;
 mod bit_utils;
-pub mod config;
-pub mod ops;
 mod reduce;
 mod bitset_interface;
 mod apply;
-pub mod iter;
-pub mod cache;
-pub mod internals;
 mod compact_block;
 mod raw;
 mod small_bitset;
 mod primitive_array;
 mod bitset;
 
+pub mod config;
+pub mod ops;
+pub mod iter;
+pub mod cache;
+pub mod internals;
+
 pub use bitset_interface::{BitSetBase, BitSetInterface};
 pub use apply::Apply;
 pub use reduce::Reduce;

src/small_bitset.rs

@@ -61,7 +61,7 @@ type RawSmallBitSet<Conf> = RawBitSet<
 /// SparseBitMap - `bit_block` acts as a sparse array:
 /// ```text
 ///                   0 1       2 3          ◁═ popcnt before element
-///                                                                  
+///                                             (dense_array indices)
 ///  bit_block      0 1 1 0 0 0 1 1 0 0 ...                          
 ///               └───┬─┬───────┬─┬─────────┘                        
 ///                ┌──┘┌┘ ┌─────┘ │                                  
@@ -122,6 +122,12 @@ impl<Conf: SmallConfig> SmallBitSet<Conf> {
         Default::default()
     }    
 
+    /// Max usize, container with this `Conf` can hold.
+    #[inline]
+    pub const fn max_capacity() -> usize {
+        RawSmallBitSet::<Conf>::max_capacity()
+    }
+
     #[inline]
     pub fn insert(&mut self, index: usize){
         self.0.insert(index)