A nested elsifdef can be incorrectly evaluated. Added the following test to t_ifdef.e:
with define ABC
with define DEF
ifdef XYZ then
test_fail( "XYZ not defined")
ifdef UVW then
test_fail( "nested UVW not defined" )
elsifdef ABC then
test_fail( "nested ifdef true elsifdef clause should never be evaluated" )
end ifdef
end ifdef
The elsifdef ABC then is part of the nested ifdef, but is evaluated as part of the top level.
This bug also causes t_platform.e to fail on non-Windows platforms.
I haven't fully grokked the ifdef part of the parser, but it looks like it doesn't track nested dead ifdef segments correctly.
GitHub