🚀 go-pugleaf

Paul Long (plong@perf.com) wrote:
: Lawrence Kirby <fred@genesis.demon.co.uk> wrote:
: [snip]
: >Writing it as:
: >
: >do outer
: >{
: >} while ()
: >
: >seems to be most consistent with the other constructs.
: 
: It's hard to parse. As an experiment, awhile back I added Andrew's
: label to a YACC grammar for Standard C. YACC reported an ambiguity
: with a label after the "do." I believe it had something to do with
: YACC not having enough lookahead. For example, the grammar could
: probably be expressed with an LALR(2) YACC.
: 
do outer
{
} while ()

Can't be parsed (easily anyway)

do
{
} while outer ()

or

do
{
} outer while ()

can be

Andrew Dunbar
GPSoftware