vhdl报错VHDL Expression error at sanj2.vhd(20): expression has 18 elements ; expected 19 elements.

报错：Error (10324): VHDL Expression error at sanj2.vhd(20): expression "('1','1','1','1','1','0','0','1','0','0','0','0','0','1','1','0','0','0')" has 18 elements ; expected 19 elements.

元素数目不够数