syntax.txt

来自「编译原理的语法分析器」· 文本 代码 · 共 10 行

list -> list ; stmt | stmt
stmt -> IF expr THEN stmt
	| IF expr THEN stmt ELSE stmt
	| WHILE expr DO stmt
	| BEGIN list END
	| ID := expr
expr -> expr + term |  term 
term -> term * factor | factor
factor -> (expr) | ID | NUM