[cfe-dev] __extension__ treatment

[Douglas Gregor]

On Oct 14, 2010, at 12:23 AM, Abramo Bagnara wrote:

> 
> Currently
> 
> Expr::IgnoreParens();
> Expr::IgnoreParenCasts();
> Expr::IgnoreParenImpCasts();
> 
> does not take in proper account __extension__ unary operator.
> 
> This means that everywhere this methods are called the behaviour would
> change if an __extension__ keyword was present.
> 
> I think this is a mistake: __extension__ is no different from parens.
> 
> What do you think about?

Sounds like a bug! __extension__ should be no different from parentheses, and should have no effect on the semantics of the program except to silence diagnostics.

	- Doug