[perl #21729] IMCC doesn't handle scientific notation constants

[Clinton A. Pierce]

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Example:

set I0, 1e20
end

Results in:

(error) line 2: parse error, unexpected IDENTIFIER, expecting '\n'
Didn't create output asm.

A larger example is BASIC's Connect-4 game:

c:> cd parrot\languages\basic\compiler
c:> compile.pl samples\conn4.bas
c:> ..\..\..\languages\imcc\imcc.exe TARG_test.pasm

Results in:

(error) line 4329: parse error, unexpected IDENTIFIER, expecting '\n'
Didn't create output asm.

[Joseph F. Ryan]

Should it, though? Although it would be pretty convienient, I think
that handling scientific notation would be an unnecessary complication
for IMCC, and it would be better handled by the compilers that target
it. (As in, the compiler converts scientific notation to decimal form
during compilition to IMCC code.)

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[Clinton A. Pierce]

At 03:43 PM 3/28/2003 -0500, Joseph F. Ryan wrote:
> >Example:
> >
> > set I0, 1e20
> > end
> >
> >Results in:
> >
> > (error) line 2: parse error, unexpected IDENTIFIER, expecting >'\n'
> > Didn't create output asm.
> >
>

>Should it, though? Although it would be pretty convienient, I think
>that handling scientific notation would be an unnecessary complication
>for IMCC, and it would be better handled by the compilers that target
>it. (As in, the compiler converts scientific notation to decimal form
>during compilition to IMCC code.)

Not my call. The current assembler does the Right Thing WRT this notation
and I'd want numeric constants handled somewhere. :)

[Mark Biggar]

First it's my understanding that the Parrot assembler does support
scientific notation, so IMCC should also. Second we need to handle
BigFloat values and I don't really want to have to express 1e12345
as a 12345+ length char string. On a related note does IMCC have a
token or line length limit?

--
Mark Biggar
ma...@biggar.org
mark.a...@attbi.com

[Leopold Toetsch]

Mark Biggar wrote:

> On a related note does IMCC have a
> token or line length limit?

Not currently, see BUGS. But there ought to be one. There are several
places where e.g. an intermediate string is fixed with size 512 or so.

We need some kind of notation for long string constants, that allow for
reasonable line length limit.

leo

[Leopold Toetsch]

Clinton A. Pierce (via RT) wrote:

>
> set I0, 1e20

Currently it has to be:

set I0, 1.e20 # dot inside

leo