result code = 0
standard error = {
tests/preprocessor/define-redefine.slang(10): warning 15400: redefinition of macro 'FOO'
#define FOO 2.0f
        ^~~
tests/preprocessor/define-redefine.slang(6): note: see previous definition of 'FOO'
#define FOO 1.0f
        ^~~
}
standard output = {
}