Currently the 'AlignConsecutive*' options incorrectly align across
elif and else statements, even if they are very far away and across
unrelated preprocessor macros.
This failed since on preprocessor run 2+, there is not enough context
about the #ifdefs to actually differentiate one block from another,
causing them to align across different blocks or even large sections of
Eg, with AlignConsecutiveAssignments:
\#if FOO // Run 1 \#else // Run 1 int a = 1; // Run 2, wrong \#endif // Run 1 \#if FOO // Run 1 \#else // Run 1 int bar = 1; // Run 2 \#endif // Run 1
is read as
int a = 1; // Run 2, wrong int bar = 1; // Run 2
The approach taken to fix this was to add a new flag to Token that
forces breaking alignment across groups of lines (MustBreakAlignBefore)
in a similar manner to the existing flag that forces a line break
(MustBreakBefore). This flag is set for the first Token after a
preprocessor statement or diff conflict marker.
Possible alternatives might be hashing preprocessor state to detect if
two lines come from the same block (but the way that ifdefs are
sometimes deferred makes that tricky) or showing the preprocessor
statements on all passes instead of just the first one (seems harder).