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Latte.cf
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Latte.cf
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-- programs ------------------------------------------------
entrypoints Program ;
Prog. Program ::= [TopDef] ;
FnDef. TopDef ::= Type Ident "(" [Arg] ")" Block ;
ClDef. TopDef ::= "class" Ident ClBlock ;
ClDefExt. TopDef ::= "class" Ident "extends" Ident ClBlock ;
separator nonempty TopDef "" ;
Ar. Arg ::= Type Ident;
separator Arg "," ;
-- classes -------------------------------------------------
ClBlk. ClBlock ::= "{" [ClMember] "}";
ClFields. ClMember ::= Type [ClFieldItem] ";" ;
ClFieldItemNoInit. ClFieldItem ::= Ident ;
separator nonempty ClFieldItem "," ;
ClMethod. ClMember ::= Type Ident "(" [Arg] ")" Block ;
separator ClMember "" ;
-- statements ----------------------------------------------
Blk. Block ::= "{" [Stmt] "}" ;
separator Stmt "" ;
Empty. Stmt ::= ";" ;
BStmt. Stmt ::= Block ;
Decl. Stmt ::= Type [Item] ";" ;
NoInit. Item ::= Ident ;
Init. Item ::= Ident "=" Expr ;
separator nonempty Item "," ;
Ass. Stmt ::= Expr6 "=" Expr ";" ;
Incr. Stmt ::= Expr "++" ";" ;
Decr. Stmt ::= Expr "--" ";" ;
Ret. Stmt ::= "return" Expr ";" ;
VRet. Stmt ::= "return" ";" ;
Cond. Stmt ::= "if" "(" Expr ")" Stmt ;
CondElse. Stmt ::= "if" "(" Expr ")" Stmt "else" Stmt ;
While. Stmt ::= "while" "(" Expr ")" Stmt ;
For. Stmt ::= "for" "(" Arg ":" Expr ")" Stmt ;
SExp. Stmt ::= Expr ";" ;
-- Types ---------------------------------------------------
Int. Type ::= "int" ;
Str. Type ::= "string" ;
Bool. Type ::= "boolean" ;
Void. Type ::= "void" ;
Class. Type ::= Ident ;
Array. Type ::= Type "[]" ;
separator Type "," ;
-- Expressions ---------------------------------------------
ENewArray. Expr6 ::= "new" Type "[" Expr "]" ;
EArrayElem. Expr7 ::= Expr6 "[" Expr "]";
EArrayElemR. Expr7 ::= Ident "[" Expr "]";
ENullArr. Expr6 ::= "(" Type "[]" ")" "null" ;
ENull. Expr6 ::= "(" Ident ")" "null" ;
ENew. Expr6 ::= "new" Type ;
EMethod. Expr6 ::= Expr6 "." Ident "(" [Expr] ")" ;
EField. Expr6 ::= Expr6 "." Ident ;
EVar. Expr6 ::= Ident ;
ELitInt. Expr6 ::= Integer ;
ELitTrue. Expr6 ::= "true" ;
ELitFalse. Expr6 ::= "false" ;
EApp. Expr6 ::= Ident "(" [Expr] ")" ;
EString. Expr6 ::= String ;
Neg. Expr5 ::= "-" Expr5 ;
Not. Expr5 ::= "!" Expr5 ;
EMul. Expr4 ::= Expr4 MulOp Expr5 ;
EAdd. Expr3 ::= Expr3 AddOp Expr4 ;
ERel. Expr2 ::= Expr2 RelOp Expr3 ;
EAnd. Expr1 ::= Expr2 "&&" Expr1 ;
EOr. Expr ::= Expr1 "||" Expr ;
coercions Expr 7 ;
separator Expr "," ;
-- operators -----------------------------------------------
Plus. AddOp ::= "+" ;
Minus. AddOp ::= "-" ;
Times. MulOp ::= "*" ;
Div. MulOp ::= "/" ;
Mod. MulOp ::= "%" ;
LTH. RelOp ::= "<" ;
LE. RelOp ::= "<=" ;
GTH. RelOp ::= ">" ;
GE. RelOp ::= ">=" ;
EQU. RelOp ::= "==" ;
NE. RelOp ::= "!=" ;
-- comments ------------------------------------------------
comment "#" ;
comment "//" ;
comment "/*" "*/" ;