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Fix Range#max for beginless Integer ranges [Bug #17034]

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* Fix Range#max for beginless Integer ranges
* Update test/ruby/test_range.rb
* Fix formatting

https://github.com/ruby/ruby/pull/3328

Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>
This commit is contained in:
Michael Kohl 2020-07-18 23:18:40 +07:00 • committed by GitHub
parent b4e784434c
commit 8a5ad2b77d
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Notes: git 2020-07-19 01:19:15 +09:00 
Merged-By: nobu <nobu@ruby-lang.org>
2 changed files with 8 additions and 3 deletions
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7
range.c
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@ -1220,16 +1220,17 @@ range_max(int argc, VALUE *argv, VALUE range)
rb_raise(rb_eRangeError, "cannot get the maximum of endless range");
}
VALUE b = RANGE_BEG(range);
if (rb_block_given_p() || (EXCL(range) && !nm) || argc) {
if (NIL_P(RANGE_BEG(range))) {
if (NIL_P(b)) {
rb_raise(rb_eRangeError, "cannot get the maximum of beginless range with custom comparison method");
}
return rb_call_super(argc, argv);
}
else {
struct cmp_opt_data cmp_opt = { 0, 0 };
VALUE b = RANGE_BEG(range);
int c = OPTIMIZED_CMP(b, e, cmp_opt);
int c = NIL_P(b) ? -1 : OPTIMIZED_CMP(b, e, cmp_opt);
if (c > 0)
return Qnil;

4
test/ruby/test_range.rb
View file

@ -127,6 +127,10 @@ class TestRange < Test::Unit::TestCase
assert_raise(RangeError) { (1...).max(3) }
assert_raise(RangeError) { (..0).min {|a, b| a <=> b } }
assert_equal(2, (..2).max)
assert_raise(TypeError) { (...2).max }
assert_raise(TypeError) { (...2.0).max }
end
def test_minmax