Soften generic constraint of Buffer

[sundy-li]

make constraint in buffer freer

[codecov]

Codecov Report

Merging #1152 (096a562) into main (1cd7453) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1152      +/-   ##
==========================================
- Coverage   83.67%   83.66%   -0.01%     
==========================================
  Files         365      365              
  Lines       35869    35869              
==========================================
- Hits        30012    30011       -1     
- Misses       5857     5858       +1     

Impacted Files	Coverage Δ
src/buffer/immutable.rs	89.33% <ø> (ø)
src/bitmap/utils/slice_iterator.rs	97.56% <0.00%> (-1.22%)	⬇️
src/io/ipc/read/common.rs	94.92% <0.00%> (-0.40%)	⬇️
src/io/ipc/read/reader.rs	96.32% <0.00%> (+0.33%)	⬆️

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[jorgecarleitao]

This is a nice idea! I think we can make this even stronger -

pub struct Buffer<T> {...}

impl<T: std::fmt::Debug> std::fmt::Debug for Buffer<T> {...}

i.e. no constraint.

Side: could you describe what is the goal? I am genuinely curious

[sundy-li]

Side: could you describe what is the goal? I am genuinely curious

I want to use Buffer<u256> and Buffer<u512> in databend.