On Saturday, 7 July 2012 at 22:35:37 UTC, Roman D. Boiko wrote:
On Saturday, 7 July 2012 at 22:25:00 UTC, David Piepgrass wrote:
This is all true, but forgetting a brace commonly results in a
barrage of error messages anyway. Code that guesses what you
meant obviously won't work all the time, and phase 3 would
have to take care not to emit an error message about a "{"
token that doesn't actually exist (that was merely
"guessed-in"). But at least it's nice for a parser to be
/able/ to guess what you meant; for a typical parser it would
be out of the question, upon detecting an error, to back up
four source lines, insert a brace and try again.
So you simply admit that error recovery is difficult to
implement. For me, it is a must-have, and thus throwing away
information is bad.
I'm not seeing any tremendous error-handling difficulty in my
idea. Anyway, I missed the part about information being thrown
away...?
