refactor tagged expression checker
refactor tagged expression checker

leavesbnw/picrin,leavesbnw/picrin,picrin-scheme/picrin,ktakashi/picrin,dcurrie/picrin,koba-e964/picrin,omasanori/picrin,picrin-scheme/picrin,koba-e964/picrin,dcurrie/picrin,koba-e964/picrin,ktakashi/picrin,ktakashi/picrin,omasanori/picrin,leavesbnw/picrin