svn commit: r302252 - head/sys/kern

[Ed Schouten]

2016-07-04 2:47 GMT+02:00 Benjamin Kaduk <bjkfbsd at gmail.com>:
> I did not think that .th_offset.tv_sec was valid [...]

It is valid. The ".field = value" construct is called a 'designator'
in C's grammar specification. What's on the left of the assignment is
called a 'designator-list', which may consist of 1 or more
'designators'. There are two types of designators:
'[constant-expression]' and '.identifier'. In other words, it is
completely valid to write the following:

struct foo bar = {
    .field[123].something = 456,
    .field[124].somethingelse = 789,
};

Which is the same as:

struct foo bar = {
    .field = {
        [123].something = 456,
        [124].somethingelse = 789,
    },
};

And:

struct foo bar = {
    .field = {
        [123] = { .something = 456 },
        [124] = { .somethingelse = 789 },
    },
};

Best regards,
-- 
Ed Schouten <ed at nuxi.nl>
Nuxi, 's-Hertogenbosch, the Netherlands
KvK-nr.: 62051717