What does { ... } do without any loop, control statement, etc in C?

Asked Jul 25 '14 at 12:27

Active Jul 25 '14 at 12:27

Viewed 91 times

I've run across some C code targeting TI microcontrollers that looks like this:

statement;
statement;

{
    statement;
    {
        statement;
        statement;
    }

    {
        statement;
        statement;
    }
}

I'm confused by the use of the { ... } blocks without a loop or control statement or anything. The comments suggest that this is an "atomic subsystem," but I understand the need for nested sets of { { ... } } in that situation.

Do the curly braces have any meaning here?
If so, is this meaning inherent to TI's compiler or is it a standard part of C?

asked Jul 25 '14 at 12:27

Computerish

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http://stackoverflow.com/questions/10593140/dont-understand-this-block-of-codeit-runs-with-no-condition/10593162#10593162 – sashang Jul 25 '14 at 12:31
Thanks Boumbles. Searched for so long, not sure how I missed that. Apple's blocks C extension has made this really hard to Google... – Computerish Jul 25 '14 at 12:31
4

Why the downvote? It is not a bad question and it has been closed as a dup? – Shafik Yaghmour Jul 25 '14 at 12:32

What does { ... } do without any loop, control statement, etc in C?

0 Answers0