---input---
match spam:
    case Some(x):
        print(f"found {x}")
    case None:
        print("found nothing")
    case _:
        assert False

---tokens---
'match'       Keyword
' '           Text.Whitespace
'spam'        Name
':'           Punctuation
'\n    '      Text.Whitespace
'case'        Name
' '           Text.Whitespace
'Some'        Name
'('           Punctuation
'x'           Name
'):'          Punctuation
'\n        '  Text.Whitespace
'print'       Name.Builtin
'('           Punctuation
'f'           Literal.String.Affix
'"'           Literal.String.Double
'found '      Literal.String.Double
'{'           Literal.String.Interpol
'x'           Name
'}'           Literal.String.Interpol
'"'           Literal.String.Double
')'           Punctuation
'\n    '      Text.Whitespace
'case'        Name
' '           Text.Whitespace
'None'        Keyword.Constant
':'           Punctuation
'\n        '  Text.Whitespace
'print'       Name.Builtin
'('           Punctuation
'"'           Literal.String.Double
'found nothing' Literal.String.Double
'"'           Literal.String.Double
')'           Punctuation
'\n    '      Text.Whitespace
'case'        Name
' '           Text.Whitespace
'_'           Name
':'           Punctuation
'\n        '  Text.Whitespace
'assert'      Keyword
' '           Text.Whitespace
'False'       Keyword.Constant
'\n'          Text.Whitespace