1 files changed, 36 insertions, 0 deletions
diff --git a/src/bool/bvec4.rs b/src/bool/bvec4.rs
index 7754cd4..b1e9144 100644
--- a/src/bool/bvec4.rs
+++ b/src/bool/bvec4.rs
@@ -25,12 +25,14 @@ impl BVec4 {
 
     /// Creates a new vector mask.
     #[inline(always)]
+    #[must_use]
     pub const fn new(x: bool, y: bool, z: bool, w: bool) -> Self {
         Self { x, y, z, w }
     }
 
     /// Creates a vector with all elements set to `v`.
     #[inline]
+    #[must_use]
     pub const fn splat(v: bool) -> Self {
         Self::new(v, v, v, v)
     }
@@ -40,28 +42,62 @@ impl BVec4 {
     /// A true element results in a `1` bit and a false element in a `0` bit.  Element `x` goes
     /// into the first lowest bit, element `y` into the second, etc.
     #[inline]
+    #[must_use]
     pub fn bitmask(self) -> u32 {
         (self.x as u32) | (self.y as u32) << 1 | (self.z as u32) << 2 | (self.w as u32) << 3
     }
 
     /// Returns true if any of the elements are true, false otherwise.
     #[inline]
+    #[must_use]
     pub fn any(self) -> bool {
         self.x || self.y || self.z || self.w
     }
 
     /// Returns true if all the elements are true, false otherwise.
     #[inline]
+    #[must_use]
     pub fn all(self) -> bool {
         self.x && self.y && self.z && self.w
     }
 
+    /// Tests the value at `index`.
+    ///
+    /// Panics if `index` is greater than 3.
+    #[inline]
+    #[must_use]
+    pub fn test(&self, index: usize) -> bool {
+        match index {
+            0 => self.x,
+            1 => self.y,
+            2 => self.z,
+            3 => self.w,
+            _ => panic!("index out of bounds"),
+        }
+    }
+
+    /// Sets the element at `index`.
+    ///
+    /// Panics if `index` is greater than 3.
+    #[inline]
+    pub fn set(&mut self, index: usize, value: bool) {
+        match index {
+            0 => self.x = value,
+            1 => self.y = value,
+            2 => self.z = value,
+            3 => self.w = value,
+            _ => panic!("index out of bounds"),
+        }
+    }
+
     #[inline]
+    #[must_use]
     fn into_bool_array(self) -> [bool; 4] {
         [self.x, self.y, self.z, self.w]
     }
 
     #[inline]
+    #[must_use]
     fn into_u32_array(self) -> [u32; 4] {
         [
             MASK[self.x as usize],