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-rw-r--r--src/nvim/eval.c7
-rw-r--r--src/nvim/eval.lua1
-rw-r--r--src/nvim/testdir/test_float_func.vim1
3 files changed, 8 insertions, 1 deletions
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 1570af07d7..94dcbe0dcf 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -47,6 +47,7 @@
#include "nvim/indent_c.h"
#include "nvim/indent.h"
#include "nvim/mark.h"
+#include "nvim/math.h"
#include "nvim/mbyte.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
@@ -12028,6 +12029,12 @@ static void f_islocked(typval_T *argvars, typval_T *rettv, FunPtr fptr)
clear_lval(&lv);
}
+// "isnan()" function
+static void f_isnan(typval_T *argvars, typval_T *rettv, FunPtr fptr)
+{
+ rettv->vval.v_number = argvars[0].v_type == VAR_FLOAT
+ && xisnan(argvars[0].vval.v_float);
+}
/// Turn a dictionary into a list
///
diff --git a/src/nvim/eval.lua b/src/nvim/eval.lua
index 6b63003e69..bc3e612b0a 100644
--- a/src/nvim/eval.lua
+++ b/src/nvim/eval.lua
@@ -190,6 +190,7 @@ return {
invert={args=1},
isdirectory={args=1},
islocked={args=1},
+ isnan={args=1},
id={args=1},
items={args=1},
jobclose={args={1, 2}, func="f_chanclose"},
diff --git a/src/nvim/testdir/test_float_func.vim b/src/nvim/testdir/test_float_func.vim
index 5ea5192994..a44c5a9e98 100644
--- a/src/nvim/testdir/test_float_func.vim
+++ b/src/nvim/testdir/test_float_func.vim
@@ -289,7 +289,6 @@ func Test_trunc()
endfunc
func Test_isnan()
- throw 'skipped: Nvim does not support 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))