diff options
| -rw-r--r-- | doc/src/sgml/xfunc.sgml | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/doc/src/sgml/xfunc.sgml b/doc/src/sgml/xfunc.sgml index f40504c4816..97a56562d3e 100644 --- a/doc/src/sgml/xfunc.sgml +++ b/doc/src/sgml/xfunc.sgml @@ -1885,17 +1885,12 @@ typedef struct <programlisting> typedef struct { int32 length; - char data[1]; + char data[FLEXIBLE_ARRAY_MEMBER]; } text; </programlisting> - Obviously, the data field declared here is not long enough to hold - all possible strings. Since it's impossible to declare a variable-size - structure in <acronym>C</acronym>, we rely on the knowledge that the - <acronym>C</acronym> compiler won't range-check array subscripts. We - just allocate the necessary amount of space and then access the array as - if it were declared the right length. (This is a common trick, which - you can read about in many textbooks about C.) + The <literal>[FLEXIBLE_ARRAY_MEMBER]</> notation means that the actual + length of the data part is not specified by this declaration. </para> <para> |