Example
C99
In 1994 more readable alternatives to five of the trigraphs were supplied. These use only two characters and are known as digraphs. Unlike trigraphs, digraphs are tokens. If a digraph occurs in another token (e.g. string literals or character constants) then it will not be treated as a digraph, but remain as it is.
The following shows the difference before and after processing the digraphs sequence.
#include <stdio.h>
int main()
<%
printf("Hello %> World!\n"); /* Note that the string contains a digraph */
%>
Which will be treated the same as:
#include <stdio.h>
int main()
{
printf("Hello %> World!\n"); /* Note the unchanged digraph within the string. */
}
| Digraph | Equivalent |
|---|---|
| <: | [ |
| :> | ] |
| <% | { |
| %> | } |
| %: | # |
