Program ::= Decl*;

abstract Decl ::= Type <Name:String>;
TypeDecl : Decl;
SampleDecl : Decl;

Field ::= Type <Name:String>;

abstract Type;
VoidType          : Type;
PrimType          : Type ::= <Name:String> <Token:int>;
UserType          : Type ::= <Name:String>;
StructType        : Type ::= Field*;
ParseArrayType    : Type ::= Type Dim*;
abstract ArrayType : Type ::= Type Exp*;
VariableArrayType : ArrayType;
FixedArrayType    : ArrayType;

Dim ::= Exp*;

abstract Exp;
IntegerLiteral : Exp ::= <Value:String>;
VariableSize : Exp;