15
Preprocessing directives
[cpp]
15.8
Diagnostic directives
[cpp.error]
1
#
A preprocessing directive of either of the following forms
# error
pp-tokens
o
p
t
new-line
# warning
pp-tokens
o
p
t
new-line
causes the implementation to produce a diagnostic message that should include the specified sequence of preprocessing tokens; the
# error
directive renders the program ill-formed
.