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range.c (inspect_range): omit beginless "nil"

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except the special case `(nil..nil)`.

```
(1..).inspect      #=> "1.."
(..5).inspect      #=> "..5"
(nil..nil).inspect #=> "nil..nil"
```

[Bug #15745]
This commit is contained in:
Yusuke Endoh 2019-05-23 00:45:30 +09:00
parent d9b338a53f
commit 9d39eb6b40
2 changed files with 13 additions and 3 deletions
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12
range.c
View file

@ -1317,10 +1317,16 @@ inspect_range(VALUE range, VALUE dummy, int recur)
if (recur) {
return rb_str_new2(EXCL(range) ? "(... ... ...)" : "(... .. ...)");
}
str = rb_inspect(RANGE_BEG(range));
if (!NIL_P(RANGE_END(range))) str2 = rb_inspect(RANGE_END(range));
str = rb_str_dup(str);
if (!NIL_P(RANGE_BEG(range)) || NIL_P(RANGE_END(range))) {
str = rb_str_dup(rb_inspect(RANGE_BEG(range)));
}
else {
str = rb_str_new(0, 0);
}
rb_str_cat(str, "...", EXCL(range) ? 3 : 2);
if (NIL_P(RANGE_BEG(range)) || !NIL_P(RANGE_END(range))) {
str2 = rb_inspect(RANGE_END(range));
}
if (str2 != Qundef) rb_str_append(str, str2);
OBJ_INFECT(str, range);

4
test/ruby/test_range.rb
View file

@ -489,6 +489,10 @@ class TestRange < Test::Unit::TestCase
assert_equal("0...1", (0...1).inspect)
assert_equal("0..", (0..nil).inspect)
assert_equal("0...", (0...nil).inspect)
assert_equal("..1", (nil..1).inspect)
assert_equal("...1", (nil...1).inspect)
assert_equal("nil..nil", (nil..nil).inspect)
assert_equal("nil...nil", (nil...nil).inspect)
bug11767 = '[ruby-core:71811] [Bug #11767]'
assert_predicate(("0".taint.."1").inspect, :tainted?, bug11767)