errcontext from PL/pgSQL (was message style for errcontext)

On May 17, 2010, at 11:20 AM, Peter Eisentraut wrote:

> We have in 9.0 plperl.c
>
> errcontext("while executing PostgreSQL::InServer::SPI::bootstrap")));
> errcontext("while parsing Perl initialization")));
> errcontext("while running Perl initialization")));
> errcontext("While executing PLC_TRUSTED.")));
> errcontext("While executing utf8fix.")));
> errcontext("While executing plperl.on_plperl_init.")));
> errcontext("while executing plperl.on_plperlu_init")));
>
> Could we agree on a capitalization and punctuation scheme?

Oh, this reminds me. Is there a way to get at errcontext data from PL/pgSQL? I'm assuming there's something to
complementSQLSTATE and SQLERRM, yes? 

Thanks,

David