片语
Conditional Signal Assignment Statement条件信号赋值语句
Selected Signal Assignment Statement选择信号赋值语句
simple array assignment statement简单数组赋值语句
assignment t statement赋值语句
normal assignment statement正规指定叙述
vector assignment statement[计]
assignment statement loop指定叙述回路
assignment statement syntax[计]
assignment statement expression指定叙述表式