AriasCreations/LSL-PyOptimizer
3
0
Fork 0
mirror of https://github.com/Sei-Lisa/LSL-PyOptimizer synced 2025-07-01 15:48:21 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fix the fix for the bug introduced in 097c054

Browse source 
Our previous fix was incomplete, because it failed to detect the last IF in a chain of ELSE IFs. For example:

if (a == 2) llDie(); else if (a) llDie(); else if (a == 3) llDie();

That would be transformed by the IF swapper into:

if (a ^ 2)
    if (a)
        llDie();
    else if (a == 3)
        llDie();
else
    llDie();

Note that the last 'else' would bind to the last 'if', not to the first one. So the condition is actually like this:

child[1] of an 'if' statement needs to be guarded in {} if the 'else' may belong to the wrong 'if'.

It will belong to the wrong 'if' if child[1] is a (possibly empty) chain of 'if {whatever} else ...', followed by an 'if' without 'else', that is:

   if (cond) stmt;

(which was what our previous check did), but also e.g.:

   if (cond) stmt; else if (cond) stmt; else if (cond) stmt;

which we neglected to consider in our previous fix.
This commit is contained in:
Sei Lisa 2017-12-14 21:19:13 +01:00
parent ed05a2e022
commit aad4cf3bee
1 changed files with 11 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

14
lslopt/lsloutput.py
View file

@ -385,9 +385,17 @@ class outscript(object):
ret = self.dent()
while True:
ret += 'if (' + self.OutExpr(child[0]) + ')\n'
if (len(child) == 3
and child[1]['nt'] == 'IF' and len(child[1]['ch']) < 3
):
# Do we need to add braces around the THEN side?
needs_braces = False
if len(child) == 3:
testnode = child[1]
# Find last IF in an ELSE IF chain
while testnode['nt'] == 'IF' and len(testnode['ch']) == 3:
testnode = testnode['ch'][2]
if testnode['nt'] == 'IF':
# hit an IF without ELSE at the end of the chain
needs_braces = True
if needs_braces:
ret += self.dent() + '{\n'
ret += self.OutIndented(child[1])
ret += self.dent() + '}\n'