In principle I can do this, but:
1. how do I hide the import of show String to replace it w/ my own?
2. If I do replce show String what else will break?
3. If instead I define an eshow function that strips "", how do I minimize
the perforamnce hit of quote stripping?
4. If I want to share
S. Alexander Jacobson writes:
In principle I can do this, but:
1. how do I hide the import of show String to replace it w/ my own?
2. If I do replce show String what else will break?
I'd rather let the preprocessor insert calls to eshow, and leave show
as it is.
3. If instead I define
--6TrnltStXW4iwmi0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Tue Jun 08 1999, S. Alexander Jacobson -
: Fair enough, but then the function should not be called show. The spec
: for show here is an internal serialization format. I guess the right
:
On Tue, 8 Jun 1999, Paul Hudak wrote:
I agree that Haskell's string notation could be improved, but note that
you could write:
sqlstring1 = "insert into mytable values \
\(NULL,'"#var1++"','"#(var1+var2)++"','"++var3++"')"
That is arguably even more ugly than just consistently using
eshow needs to apply to show to non string types.
-Alex-
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On Tue, 8 Jun 1999, Martin Norb{ck wrote:
Tue Jun 08
On 8 Jun, Paul Hudak wrote:
show x should be a string that when printed looks like the value that
you would have to type to generate it directly. This example is most
instructive:
[...]
and this is just cute:
main = putStr (quine q)
quine s = s ++ show s
q = "main = putStr (quine
var1 = 2*2
var2 = 4*var1
var3 = "Foobar""
sqlstring = "insert into mytable values "++
"(NULL,'"++(show var1)++"','"++(show var2)++"','"++var3"');"
It would be much nicer if Haskell did what perl,php, and tcl do:
sqlstring="insert into mytable values
I've been using a preprocessor to Haskell that I call HacWrite, which
adds a new kind of string appropriate for entering text. Such strings
can span multiple lines and can be escaped using curly brackets:
var1 = 2*2
var2 = 4*var1
var3 = «Foobar»
sqlstring = «insert into mytable values
Alex, you might want to explain to people (such as myself)
who don't know how Perl etc decide how much white space to insert
in the string that's broken across a line. One space? None?
What of the indentation spaces on the new line? What if
you really want those spaces to appear in
In principle I can do this, but:
1. how do I hide the import of show String to replace it w/ my own?
2. If I do replce show String what else will break?
3. If instead I define an eshow function that strips "", how do I minimize
the perforamnce hit of quote stripping?
4. If I want to share my
"S. Alexander Jacobson" wrote:
HacWrite certainly seems like an improvement over Haskell.
However, it is just not as good as the scripting languages.
HacWrite still requires the author to differentiate between strings and
other types, still requires explicit use of show and still requires
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