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object Test extends App {
val s = "Scala"
val d = 8
val b = false
val f = 3.14159
val c = 'c'
val t = new java.util.Date
val x = new java.util.Formattable {
def formatTo(ff: java.util.Formatter, g: Int, w: Int, p: Int): Unit = ff format "xxx"
}
// 1) number of arguments
new StringContext().f()
new StringContext("", " is ", "%2d years old").f(s)
new StringContext("", " is ", "%2d years old").f(s, d, d)
new StringContext("", "").f()
// 2) Interpolation mismatches
f"$s%b"
f"$s%c"
f"$f%c"
f"$s%x"
f"$b%d"
f"$s%d"
f"$f%o"
f"$s%e"
f"$b%f"
{
implicit val strToInt1 = (s: String) => 1
implicit val strToInt2 = (s: String) => 2
f"$s%d"
}
f"$s%i"
// 3) flag mismatches
f"$s%+ 0,(s"
f"$c%#+ 0,(c"
f"$d%#d"
f"$d%,x"
f"$d%+ (x"
f"$f%,(a"
f"$t%#+ 0,(tT"
// 4) bad precisions
f"$c%.2c"
f"$d%.2d"
f"%.2%"
f"%.2n"
f"$f%.2a"
f"$t%.2tT"
// 5) bad indexes
f"%<s"
f"%<c"
f"%<tT"
f"${8}%d ${9}%d%3$$d"
f"${8}%d ${9}%d%0$$d"
// warnings
f"${8}%d ${9}%1$$d"
f"$s%s $s%s %1$$<s"
f"$s%s $s%1$$s"
// 6) bad arg types
f"$s%#s"
// 7) misunderstood conversions
f"$t%tG"
f"$t%t"
f"$s%10.5"
// 8) other brain failures
f"${d}random-leading-junk%d"
}
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