casting of comptimenumbers into other comptime numbers

src/comptime.rs

@@ -2223,6 +2223,16 @@ impl ComptimeNumber {
         Ok(Self::Bool(self.cmp(other)? != Ordering::Greater))
     }
 
+    pub fn explicit_cast(self, ty: Type) -> Result<Self> {
+        match ty {
+            Type::Void => Ok(Self::Void),
+            Type::Bool => self.into_bool(),
+            Type::Integer(i) => self.into_int(i),
+            Type::Floating(f) => self.into_float(f),
+            _ => Err(Error::InvalidConversion),
+        }
+    }
+
     pub fn into_bool(self) -> Result<Self> {
         match self {
             ComptimeNumber::Integral(i) => match i {