HP aC++/HP C Programmer's Guide (B3901-90036; A.06.26; September 2011)

• ??< is replaced by {
• ??> is replaced by }
• ??- is replaced by ~
Examples
The line below contains the trigraph sequence ??=:
??=line 5 "myfile"
When this line is compiled it becomes:
#line 5 "myfile”
162 Preprocessing Directives