Reputation: 10820

Meaning of this #pragma notation

What could be the meaning of this notation.

#pragma warning( disable : 4530 )

Upvotes: 2

Answers (7)

Chubsdad

Reputation: 25487

16.6/1- "A preprocessing directive of the form # pragma pp-tokensopt new-line causes the implementation to behave in an implementation-defined manner. Any pragma that is not recognized by the implementation is ignored."

An implemention defined behavior is supposed to be documented by the vendor. So you need to look into the documentation.

Upvotes: 1

liaK

Reputation: 11648

As everybody said #pragma is used to disable the warning coded 4530..

But from MSDN,

C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc

Also,

When the /EHsc option has not been enabled, an object with automatic storage in the frame, between the function doing the throw and the function catching the throw, will not be destroyed.

To get rid of this,

Compile the sample with /EHsc to resolve the warning.

It is unwise to disable all the warnings as they creep in. And in this case instead of silencing it, you can compile it with the /EHsc option...

Hope it helps..

Upvotes: 1

codaddict

Reputation: 454920

It means disable warning message numbered 4530.

The general syntax of this pragma is:

#pragma warning( warning-specifier : warning-number-list [; warning-specifier : warning-number-list...] )

More info here

Upvotes: 1

Necrolis

Reputation: 26171

Its does exactly what it says it does, it disables compiler warning number 4530. On a side note, this isn't a free ticket to just ignore warnings, it should only be used for special cases

Upvotes: 2