I have an idea. What if we created a variable_scope command?
Something like this:
set(a "world")
variable_scope_begin(a)
set(a "hello")
message(${a})
variable_scope_end(a)
message(${a})
The above would print out:
hello
world
This could be done with the current macros, or even an include file of
cmake without having to create the idea of a function. You could of
course pass in a list of variables to variable_scope. It would be sort
of like the "my" in perl. I don't think it would be that hard to
implement this, and it would be backwards compatible, and not make the
set command any more complicated. You could nest them as well. It
could cause some odd things to happen if you forgot to add the
scope_end, but it might fix more things than it breaks.
-Bill
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