project('fortran_args', 'fortran')

fc = meson.get_compiler('fortran')

if fc.get_id() == 'intel-cl'
  is_arg = '/O2'
  useless = '/DFOO'
else
  is_arg = '-O2'
  useless = '-DFOO'
endif

isnt_arg = '-fiambroken'

assert(fc.has_argument(is_arg), 'Arg that should have worked does not work.')
assert(not fc.has_argument(isnt_arg), 'Arg that should be broken is not.')

assert(fc.get_supported_arguments([is_arg, isnt_arg, useless]) == [is_arg, useless], 'Arg filtering returned different result.')

# Have useless at the end to ensure that the search goes from front to back.
l1 = fc.first_supported_argument([isnt_arg, is_arg, isnt_arg, useless])
l2 = fc.first_supported_argument(isnt_arg, isnt_arg, isnt_arg)

assert(l1.length() == 1, 'First supported returned wrong result.')
assert(l1.get(0) == is_arg, 'First supported returned wrong argument.')
assert(l2.length() == 0, 'First supported did not return empty array.')

# --- test with an actual program, here for implicit none

in0 = fc.first_supported_argument('-fimplicit-none', '-Mdclchk', '/warn:declarations', '-warn').get(0, '')
impnone = {
'intel-cl': '/warn:declarations',
'intel': '-warn',
'gcc': '-fimplicit-none',
'pgi': '-Mdclchk',
}

arg = impnone.get(fc.get_id(), '')
if arg != ''
  assert(in0 == arg, 'implicit none argument ' + arg + ' not matching ' + in0)
endif

in1 = fc.get_supported_arguments('-fimplicit-none', '/warn:declarations', '/warn:errors', '-Mdclchk')
if in1.length() > 0
  assert(not fc.compiles(files('main.f90'), args: in1, name:'will fail implicit none'), 'implicit none should have failed')
endif