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| author | Yukihiro "Matz" Matsumoto <[email protected]> | 2014-02-02 23:39:00 -0800 |
|---|---|---|
| committer | Yukihiro "Matz" Matsumoto <[email protected]> | 2014-02-02 23:39:00 -0800 |
| commit | 33bb4578a2ae15e58cb1270adbe9af36d6436311 (patch) | |
| tree | 8f9064a52ce580aaa12228e1caa066fb5b54132b | |
| parent | 857e3cfa7cff59425eeb9c92bd4aff5494feaab0 (diff) | |
| parent | 7bf63c28769ebccb660294a38330a6abc3a22be1 (diff) | |
| download | mruby-33bb4578a2ae15e58cb1270adbe9af36d6436311.tar.gz mruby-33bb4578a2ae15e58cb1270adbe9af36d6436311.zip | |
Merge pull request #1678 from iij/float-nan-p
add Float#nan?
| -rw-r--r-- | src/numeric.c | 7 | ||||
| -rw-r--r-- | test/t/float.rb | 7 |
2 files changed, 14 insertions, 0 deletions
diff --git a/src/numeric.c b/src/numeric.c index 0b841bf70..8f9d1ba25 100644 --- a/src/numeric.c +++ b/src/numeric.c @@ -612,6 +612,12 @@ flo_truncate(mrb_state *mrb, mrb_value num) return mrb_fixnum_value((mrb_int)f); } +static mrb_value +flo_nan_p(mrb_state *mrb, mrb_value num) +{ + return mrb_bool_value(isnan(mrb_float(num))); +} + /* * Document-class: Integer * @@ -1331,4 +1337,5 @@ mrb_init_numeric(mrb_state *mrb) mrb_define_method(mrb, fl, "to_s", flo_to_s, MRB_ARGS_NONE()); /* 15.2.9.3.16(x) */ mrb_define_method(mrb, fl, "inspect", flo_to_s, MRB_ARGS_NONE()); + mrb_define_method(mrb, fl, "nan?", flo_nan_p, MRB_ARGS_NONE()); } diff --git a/test/t/float.rb b/test/t/float.rb index f70bf2d66..0c67f510a 100644 --- a/test/t/float.rb +++ b/test/t/float.rb @@ -143,3 +143,10 @@ assert('Float#truncate', '15.2.9.3.15') do assert_equal( 3, 3.123456789.truncate) assert_equal(-3, -3.1.truncate) end + +assert('Float#nan?') do + assert_true (0.0/0.0).nan? + assert_false 0.0.nan? + assert_false (1.0/0.0).nan? + assert_false (-1.0/0.0).nan? +end |