Re: Reading the while standard input into a String

[Maciej Sobczak <see.my.homepage@gmail.com>]

On Jun 6, 8:53 pm, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
wrote:

> > BTW - what about generating debug version of the executable with
> > source embedded?
>
> What for? All you need is source location tags.

Which only grow in memory. This means that the concept of dropping the
chunks that were already processed is a fiction - it just does not
happen, the data is still there in memory, just in some other form.

> > In particular, the compiler does not work on potentially
> > infinite streams (unlike cat and grep) and there is a clear concept of
> > a program structure that has its end. This means that reading the
> > whole source file into memory is a perfectly valid approach.
>
> Wrong. A good example is GNAT compiler which runs out of Windows' 1-2GB
> limit when compiling my generics. Macros tend to explode (:-))

They will explode whether you will keep the original source or not.
Let me guess - your source code is smaller than 1-2GB, right? Frankly
- how big it is in terms of percentage of the total memory used? 1%?
Dropping this amount of data (while at the same time complicating the
process with additional tags, etc.) as a means of preserving memory is
pointless. I bet there are much bigger optimization opportunities in
resulting internal data structures.

> Memory is cheap, but that does not mean you should waste it. You just do
> not need to keep anything but the current source line.

And now I would very welcome somebody from existing compiler vendors
to hop in and confess how this is *actually* done. :-)

--
Maciej Sobczak * http://www.msobczak.com * http://www.inspirel.com