5
Lexical conventions
[lex]
5.9
Preprocessing numbers
[lex.ppnumber]
pp-number
:
digit
.
digit
pp-number
digit
pp-number
identifier-nondigit
pp-number
'
digit
pp-number
'
nondigit
pp-number
e
sign
pp-number
E
sign
pp-number
p
sign
pp-number
P
sign
pp-number
.
1
#
Preprocessing number tokens lexically include all
integer-literal
tokens (
[lex.
icon]
) and all
floating-point-literal
tokens (
[lex.
fcon]
)
.
2
#
A preprocessing number does not have a type or a value; it acquires both after a successful conversion to an
integer-literal
token or a
floating-point-literal
token
.