Patrick R. Michaud wrote:
On Sun, Feb 25, 2007 at 04:39:17PM +0100, Klaas-Jan Stol wrote:
most languages that can run in interactive mode have some kind of
welcome message and prompt that is printed before the user can give any
input.
Yes, this is helpful. But also one of the things we need is a way
so that we can have "additional input" -- i.e., when entering
constructs that span multiple lines, for the language to be able
to signal HLLCompiler to obtain additional lines of input.
(a possible improvement would be to have an array
of prompts; many languages have 2 prompts, when a "\" or whatever is
given. In Python, if one gives "\" at the end of the line, the next
prompt is "...". In lua it is ">>" instead of the normal prompt ">".)
The escape character to continue on the next line should also be handled
by HLLCompiler?
something like
$P0.'joinlinechar'('\')
sets the "\" character to be the signal to HLLCompiler to keep reading
from the next line.
($P0 holds the compiler object).
I think we need to go ahead and have it possible to use an
array of prompts.
ok. I've added it, but it only uses prompts[0] right now... (the main
prompt). It also needs an attribute that keeps track of what prompt
needs to be used (an index).
kjs
As an example, I used this in Pynie.pir, which prints nicely:
C:\parrot\languages\pynie>..\..\parrot pynie.pbc
Python 2.5 for Parrot
Type "help", "copyright", "credits" or "license" for more information.
I'm generally in favor of not making false promises. So,
don't offer options that aren't available. :-)
Similarly, Pynie was modeled on Python 2.3, not 2.5... but if
someone has a copy of Python's 2.5 specification (or can point me
to it on the web), we can do 2.5.
Pm
