Warning: file_get_contents(/data/phpspider/zhask/data//catemap/0/search/2.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181
Computation theory 这个短语是什么意思;“绑定更强”;什么意思?_Computation Theory_Ebnf - Fatal编程技术网

Computation theory 这个短语是什么意思;“绑定更强”;什么意思?

Computation theory 这个短语是什么意思;“绑定更强”;什么意思?,computation-theory,ebnf,Computation Theory,Ebnf,我知道这可能是一个新手问题,但我试图理解这句话(来自一篇关于使用EBNF的元语言的论文): 在此之前,它说: Conditions are: condition ::= condition (`&´ | `|´ ) condition | `!´ condition | relation relation ::= expression ( `=´ | `#´ | `<´ | `<=´ | `>´ | `>=´ ) expression 条件是: 条

我知道这可能是一个新手问题,但我试图理解这句话(来自一篇关于使用EBNF的元语言的论文):

在此之前,它说:

Conditions are: 
  condition ::= condition (`&´ | `|´ ) condition | `!´ condition | relation 
  relation ::= expression ( `=´ | `#´ | `<´ | `<=´ | `>´ | `>=´ ) expression 
条件是:
条件::=条件(`&´´´`´´´)条件``!条件关系
关系::=表达式(`='''.``'.'''.`=')表达式
谢谢

这是指。换句话说,如果你有
A&B | C
,你真的有
(A&B)| C
。优先级较高/绑定更强的操作将首先求值

Conditions are: 
  condition ::= condition (`&´ | `|´ ) condition | `!´ condition | relation 
  relation ::= expression ( `=´ | `#´ | `<´ | `<=´ | `>´ | `>=´ ) expression