(* diderot.grm
 *
 * COPYRIGHT (c) 2010 The Diderot Project (http://diderot.cs.uchicago.edu)
 * All rights reserved.
 *)

%name Diderot;

%tokens
  : KW_actor		("actor")
  | KW_die		("die")
  | KW_field		("field")
  | KW_image		("image")
  | KW_new		("new")
  | KW_stabelize	("stabelize")
  | KW_eq		("=")
  | OP_orelse		("||")
  | OP_andalso		("&&")
  | OP_lt		("<")
  | OP_lte		("<=")
  | OP_eqeq		("==")
  | OP_neq		("!=")
  | OP_gte		(">=")
  | OP_gt		(">")
  | OP_plus		("+")
  | OP_minus		("-")
  | OP_star		("*")
  | OP_slash		("/")
  | OP_at		("@")
  | LP			("(")
  | RP			(")")
  | LB			("[")
  | RB			("]")
  | LCB			("{")
  | RCB			("}")
  | INT of IntInf.int
  | FLOAT of FloatLit.float
  | STRING of string
  | ID of Atom.atom
  ;

File
	: Decl+
	;

Decl
	: ImageDecl
	| ValueDecl
	| FunDecl
	| ActorDecl
	;

ImageDecl
	: "image" ID ";"
	;


(***** Actors *****)

ActorDecl
	: "actor" ID "(" Params ")" "{" ActorState* ActorMethod+ "}"
	;

Params
	: ( Param ( "," Param )* )?
	;

Param
	: Type ID
	;

ActorState
	: Type ID "=" Expr ";"
	;

ActorMethod
	: ID "{" "}"
	;


(***** Types *****)

Type	: "bool"
	| "int"
	| "real"
	;


(***** Expressions *****)

Expr
	: Expr1 ( "||" Expr1 )*
	;

Expr1
	: Expr2 ( "&&" Expr2 )*
	;

Expr2
	: Expr3 ( CmpOp Expr3 )*
	;

CmpExp
	: "<" | "<=" | "==" | ">=" | ">"
	;

Expr3
	: Expr4 ( AddOp Expr4 )*
	;

AddOp
	: "+" | "-"
	;

Expr4
	: Expr5 ( MulOp Expr5 )*
	;

MulOp
	: "*" | "/"
	;

Expr5
	: Expr6 ("@" Expr6)?
	;

AtomExp
	: ID
	| INT
	| FLOAT
	| STRING
	| "(" Expr ("," Expr)* ")"
	;