firstset.txt

编译原理语法分析(LL1文法) 编译原理语法分析(LL1文法)

First(statement) = { ident call begin if while <empty> }
First(expression) = { + - ident number ( }
First(proc-decl--) = { procedure <empty> }
First(block) = { const var procedure ident call begin if while <empty> }
First(proc-decl) = { procedure <empty> }
First(ident-list--) = { , <empty> }
First(ident-list) = { ident }
First(var-decl) = { var <empty> }
First(const-assignment-list--) = { , <empty> }
First(const-assignment-list) = { ident }
First(const-decl) = { const <empty> }
First(program) = { const var procedure ident call begin if while . }
First(relation) = { = <> > < >= <= }
First(condition) = { odd + - ident number ( }
First(statement-list--) = { ; <empty> }
First(statement-list) = { ident call begin if while ; <empty> }
First(factor) = { ident number ( }
First(multiplying-operator) = { * / }
First(term--) = { <empty> * / }
First(term) = { ident number ( }
First(adding-operator) = { + - }
First(expression--) = { <empty> + - }