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const ttl = (args: any, a?: any, b?: any, c?:any) => {
  console.dir(args)
  console.log(a)
  console.log(b)
  console.log(c)
}

ttl`hello world`

// ["hello world"]
// undefined
// undefined
// undefined

const ttl = (args: any, ...values: any) => {
  console.dir(args)
  console.dir(values)
}
ttl`hello world${1}${2}${3}`
// ["hello world", "", "", ""]
// [1,2,3]

// Tagged Template Literal
const currentYear = (args: any, ...values: any) => {
  return args[0] +values[0].getFullYear() +"年"
}

// 関数
const currentYearFunc = (text: string, date: Date) => { 
  return text +date.getFullYear() +"年" 
}

currentYear`現在は${new Date()}`
currentYearFunc("現在は", new Date())

// 現在は2020年