Deprecate BigDecimal.new

Author: mrkn

ext/bigdecimal/bigdecimal.c

@@ -2594,6 +2594,13 @@ static Real *BigDecimal_new(int argc, VALUE *argv);
  * ArgumentError:: If the +initial+ is a Float or Rational, and the +digits+
  *                 value is omitted, this exception is raised.
  */
+static VALUE
+BigDecimal_s_new(int argc, VALUE *argv, VALUE self)
+{
+  rb_warning("BigDecimal.new is deprecated");
+  return rb_call_super(argc, argv);
+}
+
 static VALUE
 BigDecimal_initialize(int argc, VALUE *argv, VALUE self)
 {
@@ -3279,6 +3286,7 @@ Init_bigdecimal(void)
     rb_define_global_function("BigDecimal", BigDecimal_global_new, -1);
 
     /* Class methods */
+    rb_define_singleton_method(rb_cBigDecimal, "new", BigDecimal_s_new, -1);
     rb_define_singleton_method(rb_cBigDecimal, "mode", BigDecimal_mode, -1);
     rb_define_singleton_method(rb_cBigDecimal, "limit", BigDecimal_limit, -1);
     rb_define_singleton_method(rb_cBigDecimal, "double_fig", BigDecimal_double_fig, 0);

test/test_bigdecimal.rb

@@ -133,20 +133,22 @@ def test_new
   end
 
   def test_new
-    assert_equal(1, BigDecimal.new("1"))
-    assert_equal(1, BigDecimal.new("1", 1))
-    assert_equal(1, BigDecimal.new(" 1 "))
-    assert_equal(111, BigDecimal.new("1_1_1_"))
-    assert_equal(10**(-1), BigDecimal.new("1E-1"), '#4825')
+    assert_warning(/BigDecimal.new is deprecated/) do
+      assert_equal(1, BigDecimal.new("1"))
+      assert_equal(1, BigDecimal.new("1", 1))
+      assert_equal(1, BigDecimal.new(" 1 "))
+      assert_equal(111, BigDecimal.new("1_1_1_"))
+      assert_equal(10**(-1), BigDecimal.new("1E-1"), '#4825')
 
-    assert_raise(ArgumentError, /"_1_1_1"/) { BigDecimal.new("_1_1_1") }
+      assert_raise(ArgumentError, /"_1_1_1"/) { BigDecimal.new("_1_1_1") }
 
-    BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
-    BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
-    assert_positive_infinite(BigDecimal.new("Infinity"))
-    assert_negative_infinite(BigDecimal.new("-Infinity"))
-    assert_nan(BigDecimal.new("NaN"))
-    assert_positive_infinite(BigDecimal.new("1E1111111111111111111"))
+      BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
+      BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
+      assert_positive_infinite(BigDecimal.new("Infinity"))
+      assert_negative_infinite(BigDecimal.new("-Infinity"))
+      assert_nan(BigDecimal.new("NaN"))
+      assert_positive_infinite(BigDecimal.new("1E1111111111111111111"))
+    end
   end
 
   def test_new_with_integer