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rational.c: try converting by to_int in Rational() (#3684)

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[Bug #12485]
This commit is contained in:
Kenta Murata 2020-10-22 17:59:52 +09:00 committed by GitHub
parent 603fb940c0
commit d23d5c3130
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GPG key ID: 4AEE18F83AFDEB23
Notes: git 2020-10-22 18:00:33 +09:00 
Merged-By: mrkn <mrkn@ruby-lang.org>
2 changed files with 50 additions and 3 deletions
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34
rational.c
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@ -2573,6 +2573,8 @@ nurat_convert(VALUE klass, VALUE numv, VALUE denv, int raise)
VALUE a1 = numv, a2 = denv;
int state;
assert(a1 != Qundef);
if (NIL_P(a1) || NIL_P(a2)) {
if (!raise) return Qnil;
rb_raise(rb_eTypeError, "can't convert nil into Rational");
@ -2588,21 +2590,47 @@ nurat_convert(VALUE klass, VALUE numv, VALUE denv, int raise)
a2 = RCOMPLEX(a2)->real;
}
if (RB_FLOAT_TYPE_P(a1)) {
if (RB_INTEGER_TYPE_P(a1)) {
// nothing to do
}
else if (RB_FLOAT_TYPE_P(a1)) {
a1 = float_to_r(a1);
}
else if (RB_TYPE_P(a1, T_RATIONAL)) {
// nothing to do
}
else if (RB_TYPE_P(a1, T_STRING)) {
a1 = string_to_r_strict(a1, raise);
if (!raise && NIL_P(a1)) return Qnil;
}
else if (!rb_respond_to(a1, idTo_r)) {
VALUE tmp = rb_protect(rb_check_to_int, a1, NULL);
rb_set_errinfo(Qnil);
if (!NIL_P(tmp)) {
a1 = tmp;
}
}
if (RB_FLOAT_TYPE_P(a2)) {
if (RB_INTEGER_TYPE_P(a2)) {
// nothing to do
}
else if (RB_FLOAT_TYPE_P(a2)) {
a2 = float_to_r(a2);
}
else if (RB_TYPE_P(a2, T_RATIONAL)) {
// nothing to do
}
else if (RB_TYPE_P(a2, T_STRING)) {
a2 = string_to_r_strict(a2, raise);
if (!raise && NIL_P(a2)) return Qnil;
}
else if (a2 != Qundef && !rb_respond_to(a2, idTo_r)) {
VALUE tmp = rb_protect(rb_check_to_int, a2, NULL);
rb_set_errinfo(Qnil);
if (!NIL_P(tmp)) {
a2 = tmp;
}
}
if (RB_TYPE_P(a1, T_RATIONAL)) {
if (a2 == Qundef || (k_exact_one_p(a2)))
@ -2610,7 +2638,7 @@ nurat_convert(VALUE klass, VALUE numv, VALUE denv, int raise)
}
if (a2 == Qundef) {
if (!k_integer_p(a1)) {
if (!RB_INTEGER_TYPE_P(a1)) {
if (!raise) {
VALUE result = rb_protect(to_rational, a1, NULL);
rb_set_errinfo(Qnil);

19
test/ruby/test_rational.rb
View file

@ -128,6 +128,13 @@ class Rational_Test < Test::Unit::TestCase
assert_raise(TypeError){Rational(Object.new, Object.new)}
assert_raise(TypeError){Rational(1, Object.new)}
bug12485 = '[ruby-core:75995] [Bug #12485]'
o = Object.new
def o.to_int; 1; end
assert_equal(1, Rational(o, 1), bug12485)
assert_equal(1, Rational(1, o), bug12485)
assert_equal(1, Rational(o, o), bug12485)
o = Object.new
def o.to_r; 1/42r; end
assert_equal(1/42r, Rational(o))
@ -834,6 +841,18 @@ class Rational_Test < Test::Unit::TestCase
assert_equal(nil, Rational(1, Object.new, exception: false))
}
bug12485 = '[ruby-core:75995] [Bug #12485]'
assert_nothing_raised(RuntimeError, bug12485) {
o = Object.new
def o.to_int; raise; end
assert_equal(nil, Rational(o, exception: false))
}
assert_nothing_raised(RuntimeError, bug12485) {
o = Object.new
def o.to_int; raise; end
assert_equal(nil, Rational(1, o, exception: false))
}
o = Object.new;
def o.to_r; raise; end
assert_nothing_raised(RuntimeError) {