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patch 8.1.1111: it is not easy to check for infinity

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Problem:    It is not easy to check for infinity.
Solution:   Add isinf(). (Ozaki Kiichi, closes #3787)
This commit is contained in:
Bram Moolenaar
2019-04-04 13:44:37 +02:00
parent e5e4e22c1c
commit fda1bff39f
4 changed files with 45 additions and 9 deletions
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23
src/testdir/test_float_func.vim
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@@ -288,13 +288,24 @@ func Test_trunc()
call assert_fails("call trunc('')", 'E808:')
endfunc
func Test_isinf()
call assert_equal(1, isinf(1.0/0.0))
call assert_equal(-1, isinf(-1.0/0.0))
call assert_false(isinf(1.0))
call assert_false(isinf(0.0/0.0))
call assert_false(isinf('a'))
call assert_false(isinf([]))
call assert_false(isinf({}))
endfunc
func Test_isnan()
call assert_equal(0, isnan(1.0))
call assert_equal(1, isnan(0.0/0.0))
call assert_equal(0, isnan(1.0/0.0))
call assert_equal(0, isnan('a'))
call assert_equal(0, isnan([]))
call assert_equal(0, isnan({}))
call assert_true(isnan(0.0/0.0))
call assert_false(isnan(1.0))
call assert_false(isnan(1.0/0.0))
call assert_false(isnan(-1.0/0.0))
call assert_false(isnan('a'))
call assert_false(isnan([]))
call assert_false(isnan({}))
endfunc
" This was converted from test65