Implement BigDecimal followup (#5255)

Sija · bcardiff · commit aaedc4e24c12 · 2017-11-18T11:17:56.000-03:00
* Remove unnecessary “src/big_decimal.cr”

* Make `BigDecimal` descendant of `Number`

* Add forward declaration for `BigDecimal`
diff --git a/spec/std/big/big_decimal_spec.cr b/spec/std/big/big_decimal_spec.cr
@@ -1,5 +1,5 @@
 require "spec"
-require "big_decimal"
+require "big"
 
 describe BigDecimal do
   it "initializes from valid input" do
diff --git a/src/big.cr b/src/big.cr
@@ -8,6 +8,9 @@ end
 struct BigRational < Number
 end
 
+struct BigDecimal < Number
+end
+
 require "./big/lib_gmp"
 require "./big/big_int"
 require "./big/big_float"
diff --git a/src/big/big_decimal.cr b/src/big/big_decimal.cr
@@ -1,5 +1,3 @@
-require "big"
-
 # A `BigDecimal` represents arbitrary precision decimals.
 #
 # It is internally represented by a pair of `BigInt` and `UInt64`: value and scale.
@@ -15,7 +13,7 @@ class InvalidBigDecimalException < Exception
   end
 end
 
-struct BigDecimal
+struct BigDecimal < Number
   ZERO                       = BigInt.new(0)
   TEN                        = BigInt.new(10)
   DEFAULT_MAX_DIV_ITERATIONS = 100_u64
diff --git a/src/big_decimal.cr b/src/big_decimal.cr
