-- ordinary rules
-True. Bool ::= "true" ;
-False. Bool ::= "false" ;
+Program. Stms ::= [Stm] ;
+
+SExp. Stm ::= Exp ";" ;
+SBlock. Stm ::= "{" [Stm] "}" ;
SDecl. Stm ::= Type Ident "=" Exp ";" ;
decl. Stm ::= Type Ident ";" ;
define decl t v = SDecl t v EDefault ;
-SExp. Stm ::= Exp ";" ;
-SBlock. Stm ::= "{" [Stm] "}" ;
-if. Stm ::= "if" "(" Exp ")" Stm ;
+
+SWhile. Stm ::= "while" "(" Exp ")" Stm ;
SIf. Stm ::= "if" "(" Exp ")" Stm "else" Stm ;
+if. Stm ::= "if" "(" Exp ")" Stm ;
define if e s = SIf e s SNoop ;
-SWhile. Stm ::= "while" "(" Exp ")" Stm ;
+
-- SFor. Stm ::= "for" "(" Stm Exp ";" Exp ")" Stm ;
SPrint. Stm ::= "print" Exp ";" ;
+
+
EAss. Exp ::= Ident "=" Exp;
-BExp. Exp ::= Exp1 BOp Exp1 ;
+
+compExp. Exp ::= Exp1 Op0 Exp1 ;
+define compExp e1 o e2 = BiOpExp e1 o e2 ;
+
op1. Exp1 ::= Exp1 Op1 Exp2 ;
-define op1 e1 o e2 = OpExp e1 o e2 ;
+define op1 e1 o e2 = BiOpExp e1 o e2 ;
+
op2. Exp2 ::= Exp2 Op2 Exp3 ;
-define op2 e1 o e2 = OpExp e1 o e2 ;
-postIncr. Exp3 ::= Ident "++" ;
+define op2 e1 o e2 = BiOpExp e1 o e2 ;
+
+postIncr. Exp3 ::= Ident "++" ;
define postIncr i = EPost i Plus ;
+
postDecr. Exp3 ::= Ident "--" ;
define postDecr i = EPost i Minus ;
+
EVar. Exp3 ::= Ident ;
EInt. Exp3 ::= Integer ;
-ENeg. Exp3 ::= "-" Exp3 ;
EBool. Exp3 ::= Bool ;
+
+ENeg. Exp3 ::= "-" Exp3 ;
+ENot. Exp3 ::= "!" Exp3 ;
+
EReadI. Exp3 ::= "readInt" ;
EReadB. Exp3 ::= "readBool" ;
+
coercions Exp 3 ;
terminator Stm "" ;
-Program. Stms ::= [Stm] ;
-Lt. BOp ::= "<" ;
-ELt. BOp ::= "<=" ;
-Gt. BOp ::= ">" ;
-EGt. BOp ::= ">=" ;
-Eq. BOp ::= "==" ;
-NEq. BOp ::= "!=" ;
+Lt. Op0 ::= "<" ;
+ELt. Op0 ::= "<=" ;
+Gt. Op0 ::= ">" ;
+EGt. Op0 ::= ">=" ;
+Eq. Op0 ::= "==" ;
+NEq. Op0 ::= "!=" ;
Plus. Op1 ::= "+" ;
Minus. Op1 ::= "-" ;
_. Op ::= Op1;
_. Op ::= Op2;
+_. Op ::= Op0;
+True. Bool ::= "true" ;
+False. Bool ::= "false" ;
-TInt. Type ::= "int" ;
+TInt. Type ::= "int" ;
TBool. Type ::= "bool" ;
-- pragmas
internal ExpT. Exp ::= Type Exp ;
internal SNoop. Stm ::= ;
internal EDefault. Exp ::= ;
-internal OpExp. Exp ::= Exp Op Exp ;
+internal BiOpExp. Exp ::= Exp Op Exp ;
internal NoType. Type ::= ;
internal EPost. Exp ::= Ident Op1 ;