[dmd-internals] dmd commit, revision 707

Brad Roberts braddr at puremagic.com
Thu Oct 7 23:49:51 PDT 2010

On 10/7/2010 10:35 PM, dsource.org wrote:
> dmd commit, revision 707
> user: walter
> msg:
> fix gcc spurious warning
> http://www.dsource.org/projects/dmd/changeset/707

Error, not warning.

I was curious enough to do some digging.  Here's the relevant snippet..  quite
possibly not a direct quote, but repeated several times across several different

The reason is that such jump is a scoping violation. C++ standard paragraph 6.7.3:

It is possible to transfer into a block, but not in a way that bypasses
declarations with initialization. A program that jumps (77) from a point where a
local variable with automatic storage duration is not in scope to a point where
it is in scope is ill-formed unless the variable has POD type (3.9) and is
declared without an initializer (8.5).

77) The transfer from the condition of a switch statement to a case label is
considered a jump in this respect.

So, based on that, it's neither spurious nor a bug in gcc.  That dmd accepts it
seems to be a bug. :)


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