diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | numeric.c | 14 |
2 files changed, 20 insertions, 0 deletions
@@ -1,3 +1,9 @@ +Thu Nov 8 09:34:00 2012 Kenta Murata <[email protected]> + + * numeric.c: Add description of that the results of the comparing + operations of two NaNs are undefined. + [#1720] [ruby-dev:38725] [ruby-core:36966] + Thu Nov 8 04:45:21 2012 Marc-Andre Lafortune <[email protected]> * include/ruby/intern.h: Restore rb_enumeratorize as it was before @@ -1042,6 +1042,8 @@ num_equal(VALUE x, VALUE y) * Returns <code>true</code> only if <i>obj</i> has the same value * as <i>flt</i>. Contrast this with <code>Float#eql?</code>, which * requires <i>obj</i> to be a <code>Float</code>. + * The result of <code>NaN == NaN</code> is undefined, so the + * implementation-dependent value is returned. * * 1.0 == 1 #=> true * @@ -1109,6 +1111,8 @@ rb_dbl_cmp(double a, double b) * Returns -1, 0, +1 or nil depending on whether <i>flt</i> is less * than, equal to, or greater than <i>real</i>. This is the basis for * the tests in <code>Comparable</code>. + * The result of <code>NaN <=> NaN</code> is undefined, so the + * implementation-dependent value is returned. */ static VALUE @@ -1153,6 +1157,8 @@ flo_cmp(VALUE x, VALUE y) * flt > real -> true or false * * <code>true</code> if <code>flt</code> is greater than <code>real</code>. + * The result of <code>NaN > NaN</code> is undefined, so the + * implementation-dependent value is returned. */ static VALUE @@ -1193,6 +1199,8 @@ flo_gt(VALUE x, VALUE y) * * <code>true</code> if <code>flt</code> is greater than * or equal to <code>real</code>. + * The result of <code>NaN >= NaN</code> is undefined, so the + * implementation-dependent value is returned. */ static VALUE @@ -1232,6 +1240,8 @@ flo_ge(VALUE x, VALUE y) * flt < real -> true or false * * <code>true</code> if <code>flt</code> is less than <code>real</code>. + * The result of <code>NaN < NaN</code> is undefined, so the + * implementation-dependent value is returned. */ static VALUE @@ -1272,6 +1282,8 @@ flo_lt(VALUE x, VALUE y) * * <code>true</code> if <code>flt</code> is less than * or equal to <code>real</code>. + * The result of <code>NaN <= NaN</code> is undefined, so the + * implementation-dependent value is returned. */ static VALUE @@ -1313,6 +1325,8 @@ flo_le(VALUE x, VALUE y) * Returns <code>true</code> only if <i>obj</i> is a * <code>Float</code> with the same value as <i>flt</i>. Contrast this * with <code>Float#==</code>, which performs type conversions. + * The result of <code>NaN.eql?(NaN)</code> is undefined, so the + * implementation-dependent value is returned. * * 1.0.eql?(1) #=> false */ |