TomTypeAlias : ClassDecl ::= ConcreteTypeAccess:Access TomTypeAliasBody:BodyDecl* /BodyDecl*/;
BackQuoteExpr : Expr ::= Expr;

MethodMappings : BodyDecl ::= MethodDecl*;

MethodMapping : MethodDecl;
MakeMapping : MethodMapping ::= <ConstructorName:String> TomTypedParameter:ParameterDeclaration*;
TomParameter : ParameterDeclaration;
GetSlotMapping : MethodMapping ::= <SlotName:String> TomTypedParameter:ParameterDeclaration*;

OperatorMapping : BodyDecl ::= Access <Name:String> TomTypedParameter:ParameterDeclaration*;

MatchStmt : Stmt ::= [TypeAccess:Access] Expr Rule*;

Rule ::= Expr Stmt;