bit_field/type#width_mismatch?, #required_widthの実装を小修正
bit_field/type#width_mismatch?, #required_widthの実装を小修正
taichi-ishitani/rggen,taichi-ishitani/rgen,taichi-ishitani/rgen,taichi-ishitani/rggen,taichi-ishitani/rggen,taichi-ishitani/rggen,taichi-ishitani/rgen