What is the " : " (two dots) operator in c++

Asked Jun 09 '19 at 00:15

Active Jun 09 '19 at 00:34

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I have seen the : operator (is this the appropriate term?) used in multiple places in c++ code. Exemple

struct { u32 G:1; u8 T;} a;

Does it mean initialize G ? If so why we don't use the usual = operator, or the () like in int a(32) ;

I'm aware of the : when used in constructors is this related ?

Thank you.

Some says it's a possible duplicate to this questions : What does a colon following a C++ constructor name do? I guess no because the mentioned questions asks about constructors, here we're not talking about constructors. Maybe number of bits?

edited Jun 09 '19 at 00:34

asked Jun 09 '19 at 00:15

Yassine

Possible answer can be https://stackoverflow.com/a/1272707/7994074 – ParthS007 Jun 09 '19 at 00:17
TL;DR: The number specifies the amount of bits in a bitfield. – HolyBlackCat Jun 09 '19 at 00:19
For the record, that's called a "colon". – Jun 09 '19 at 03:17

What is the " : " (two dots) operator in c++

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