#4	expr -> i = j + m
	In exractExprVardecl  expr : Joinpoint 'binaryOp'
	In exractExprVardecl  expr.joinPointType : binaryOp
	In exractExprVardecl  expr.selects : left,right,vardecl
	In exractExprVardecl  expr.vardecl : undefined

#4	expr -> i
	In exractExprVardecl  expr : Joinpoint 'varref'
	In exractExprVardecl  expr.joinPointType : varref
	In exractExprVardecl  expr.selects : vardecl
	In exractExprVardecl  expr.vardecl : Joinpoint 'vardecl'
	>>>> vardecl#4	int i

#4	expr -> j + m
	In exractExprVardecl  expr : Joinpoint 'binaryOp'
	In exractExprVardecl  expr.joinPointType : binaryOp
	In exractExprVardecl  expr.selects : left,right,vardecl
	In exractExprVardecl  expr.vardecl : undefined

#4	expr -> j
	In exractExprVardecl  expr : Joinpoint 'varref'
	In exractExprVardecl  expr.joinPointType : varref
	In exractExprVardecl  expr.selects : vardecl
	In exractExprVardecl  expr.vardecl : Joinpoint 'vardecl'
	>>>> vardecl#4	int j


#4	expr -> m
	In exractExprVardecl  expr : Joinpoint 'varref'
	In exractExprVardecl  expr.joinPointType : varref
	In exractExprVardecl  expr.selects : vardecl
	In exractExprVardecl  expr.vardecl : Joinpoint 'vardecl'
	>>>> vardecl#4	int m


