//! Implementing `Collapse` for primitive types
use super::*;

macro_rules! collapse {
    (unsafe $type:ty) => {
	impl Collapsible for $type
	{
	    #[inline] fn collapse(&self) -> u8
	    {
		collapse(unsafe {
		    std::slice::from_raw_parts(self as *const Self as *const u8, std::mem::size_of_val::<Self>(self))
		})
	    }    
	}
    };

    (char) => {
	impl Collapsible for char
	{
	    #[inline] fn collapse(&self) -> u8
	    {
		(u32::from(*self) % (MAX as u32)) as u8
	    }
	}
    };
    ($type:ty) => {
	impl Collapsible for $type
	{
	    #[inline] fn collapse(&self) -> u8
	    {
		const _: &[(); 1] =  &[(); (((MAX as $type) as usize) == MAX) as usize];
		(*self % MAX as Self) as u8
	    }
	}
    };
}

impl Collapsible for bool
{
    #[inline] fn collapse(&self) -> u8
    {
	*self as u8
    }    
}
impl Collapsible for u8
{
    #[inline] fn collapse(&self) -> u8
    {
	*self
    }    
}

impl Collapsible for i8
{
    #[inline] fn collapse(&self) -> u8
    {
	*self as u8
    }    
}

collapse!(char);
collapse!(u16);
collapse!(i16);
collapse!(i32);
collapse!(u32);
collapse!(u64);
collapse!(i64);
collapse!(i128);
collapse!(u128);