'\a'
wg17_numeric_escape.
!
wg17_hex_escape.
[:-,-]
f(*)
f(;,'|',';;')
wg17_operator_arguments.
a*(b+c)
a:-b,c
wg17_operator_precedence.
wg17_spaced_prefix_operator((a, b)).
'.'(a,[])
wg17_canonical_list.
'\0\'
wg17_zero_character_escape.
''
a
ab
'a b'
wg17_continuation_escapes.
'\33\'
wg17_non_symbolic_control_write.