churf/Grammar.cf
2023-02-14 10:12:38 +01:00

31 lines
655 B
CFEngine3

Program. Program ::= [Bind] ;
Bind. Bind ::= Ident [Ident] "=" Exp ;
EAnn. Exp5 ::= Exp5 ":" Type ;
EId. Exp4 ::= Ident ;
EConst. Exp4 ::= Const ;
EApp. Exp3 ::= Exp3 Exp4 ;
EAdd. Exp1 ::= Exp1 "+" Exp2 ;
ELet. Exp ::= "let" Ident "=" Exp "in" Exp ;
EAbs. Exp ::= "\\" Ident "." Exp ;
CInt. Const ::= Integer ;
CStr. Const ::= String ;
TMono. Type1 ::= UIdent ;
TPoly. Type1 ::= LIdent ;
TArrow. Type ::= Type "->" Type1 ;
token UIdent (upper (letter | digit | '_')*) ;
token LIdent (lower (letter | digit | '_')*) ;
separator Bind ";" ;
separator Ident " ";
coercions Type 1 ;
coercions Exp 5 ;
comment "--" ;
comment "{-" "-}" ;