jyapayne/Nim
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

splitted echo into echo/debugEcho

Browse source
This commit is contained in:
Araq 2012-09-13 08:46:24 +02:00
commit a783077cfd
3 changed files with 8 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

13
doc/trmacros.txt
View file

@ -44,19 +44,6 @@ Fortunately Nimrod supports side effect analysis:
echo "side effect!"
result = 55
echo f() * 2 # and still optimized ;-)
The reason is that the compiler does not consider 'echo' to have side effects
for debugging convenience (this is comparable to Haskell's ``UnsafeIO`` monad).
So lets try it with a "real" side effect:
.. code-block:: nimrod
template optMul{`*`(a, 2)}(a: int{noSideEffect}): int = a+a
proc f(): int =
writeln stdout, "side effect!"
result = 55
echo f() * 2 # not optimized ;-)
So what about ``2 * a``? We should tell the compiler ``*`` is commutative. We