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

'nil' as a statement is deprecated, use an empty 'discard' instead

Browse source
This commit is contained in:
Araq 2014-01-19 16:54:59 +01:00
commit 73c6efdf66
54 changed files with 170 additions and 170 deletions
Download patch file Download diff file Expand all files Collapse all files

10
doc/tut1.txt
View file

@ -324,12 +324,12 @@ the compiler that for every other value nothing should be done:
case n
of 0..2, 4..7: echo("The number is in the set: {0, 1, 2, 4, 5, 6, 7}")
of 3, 8: echo("The number is 3 or 8")
else: nil
else: discard
The ``nil`` statement is a *do nothing* statement. The compiler knows that a
case statement with an else part cannot fail and thus the error disappears. Note
that it is impossible to cover all possible string values: that is why there is
no such check for string cases.
The empty ``discard`` statement is a *do nothing* statement. The compiler knows
that a case statement with an else part cannot fail and thus the error
disappears. Note that it is impossible to cover all possible string values:
that is why there is no such check for string cases.
In general the case statement is used for subrange types or enumerations where
it is of great help that the compiler checks that you covered any possible