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Update cmpnum document.

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`cmpnum` function may return `nil` on error.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2020-05-03 17:14:26 +09:00
parent 91368c117c
commit e82b8b7bf8
1 changed files with 3 additions and 2 deletions
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src/numeric.c
+3 -2
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@@ -1474,13 +1474,14 @@ cmpnum(mrb_state *mrb, mrb_value v1, mrb_value v2)
/* 15.2.9.3.6 */
/*
* call-seq:
* self.f <=> other.f => -1, 0, +1
* self.f <=> other.f => -1, 0, +1, or nil
* < => -1
* = => 0
* > => +1
* Comparison---Returns -1, 0, or +1 depending on whether <i>fix</i> is
* less than, equal to, or greater than <i>numeric</i>. This is the
* basis for the tests in <code>Comparable</code>.
* basis for the tests in <code>Comparable</code>. When the operands are
* not comparable, it returns nil instead of raising an exception.
*/
static mrb_value
integral_cmp(mrb_state *mrb, mrb_value self)