#testmode:repl
'A' Expect<'x'>
'B' Expect<'x'>
'C' Expect<'x'>
'D' Expect<'x'>
'E' Expect<'x'>
'F' Expect<'x'>
#---
#A1B12.34CXXX D%E F
#---
#ERR:Line 1, column 2: Expecting 'x', but got 1
#ERR:Line 1, column 4: Expecting 'x', but got 12.34
#ERR:Line 1, column 10: Expecting 'x', but got "XXX"
#ERR:Line 1, column 15: Expecting 'x', but got "%"
#ERR:Line 1, column 17: Expecting 'x', but got " "
#ERR:Line 1, column 19: Expecting 'x', but got "end-of-file"