[feat] port to no_std target

Author: hky1999

src/lib.rs

@@ -1,4 +1,10 @@
-use std::{
+#![no_std]
+
+extern crate alloc;
+
+use alloc::vec;
+use alloc::vec::Vec;
+use core::{
     fmt::Debug,
     iter::Sum,
     ops::{Add, AddAssign, Range, Sub},
@@ -197,20 +203,20 @@ mod tests {
         let mut alloc = RangeAllocator::new(0..10);
         // Test if an allocation works
         assert_eq!(alloc.allocate_range(4), Ok(0..4));
-        assert!(alloc.allocated_ranges().eq(std::iter::once(0..4)));
+        assert!(alloc.allocated_ranges().eq(core::iter::once(0..4)));
         // Free the prior allocation
         alloc.free_range(0..4);
         // Make sure the free actually worked
         assert_eq!(alloc.free_ranges, vec![0..10]);
-        assert!(alloc.allocated_ranges().eq(std::iter::empty()));
+        assert!(alloc.allocated_ranges().eq(core::iter::empty()));
     }
 
     #[test]
     fn test_out_of_space() {
         let mut alloc = RangeAllocator::new(0..10);
         // Test if the allocator runs out of space correctly
         assert_eq!(alloc.allocate_range(10), Ok(0..10));
-        assert!(alloc.allocated_ranges().eq(std::iter::once(0..10)));
+        assert!(alloc.allocated_ranges().eq(core::iter::once(0..10)));
         assert!(alloc.allocate_range(4).is_err());
         alloc.free_range(0..10);
     }
@@ -220,7 +226,7 @@ mod tests {
         let mut alloc = RangeAllocator::new(0..11);
         // Test if the allocator runs out of space correctly
         assert_eq!(alloc.allocate_range(10), Ok(0..10));
-        assert!(alloc.allocated_ranges().eq(std::iter::once(0..10)));
+        assert!(alloc.allocated_ranges().eq(core::iter::once(0..10)));
         assert!(alloc.allocate_range(4).is_err());
         alloc.grow_to(20);
         assert_eq!(alloc.allocate_range(4), Ok(10..14));
@@ -283,7 +289,7 @@ mod tests {
         assert_eq!(alloc.allocate_range(10), Ok(80..90));
         assert_eq!(alloc.allocate_range(10), Ok(90..100));
         assert_eq!(alloc.free_ranges, vec![]);
-        assert!(alloc.allocated_ranges().eq(std::iter::once(0..100)));
+        assert!(alloc.allocated_ranges().eq(core::iter::once(0..100)));
         alloc.free_range(10..20);
         alloc.free_range(30..40);
         alloc.free_range(50..60);
@@ -321,7 +327,7 @@ mod tests {
         assert_eq!(alloc.allocate_range(4), Ok(96..100));
         // Check that nothing is free.
         assert_eq!(alloc.free_ranges, vec![]);
-        assert!(alloc.allocated_ranges().eq(std::iter::once(0..100)));
+        assert!(alloc.allocated_ranges().eq(core::iter::once(0..100)));
     }
 
     #[test]
@@ -353,6 +359,6 @@ mod tests {
         alloc.free_range(6..9);
         alloc.free_range(3..6);
         assert_eq!(alloc.free_ranges, vec![0..9]);
-        assert!(alloc.allocated_ranges().eq(std::iter::empty()));
+        assert!(alloc.allocated_ranges().eq(core::iter::empty()));
     }
 }