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Support BigDecimal comparison with and initialization from BigRational #5675

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merged 1 commit into from
Feb 10, 2018
Merged

Support BigDecimal comparison with and initialization from BigRational #5675

merged 1 commit into from
Feb 10, 2018

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Sija
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@Sija Sija commented Feb 2, 2018

This PR allows below code to work:

def add_numbers(*numbers : Number)
  numbers.reduce(0.to_big_d) { |sum, n| sum + n.to_big_d }
end

add_numbers(1, 1.23, 3.to_big_d, 3.3.to_big_r) # => 8.53

RX14
RX14 approved these changes Feb 2, 2018
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src/big/big_decimal.cr Outdated
@@ -133,6 +134,11 @@ struct BigDecimal < Number
initialize(num.to_s)
end

# Creates a new `BigDecimal` from `BigRational`.
def initialize(num : BigRational)
initialize(num.to_f64)
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How about num.numerator.to_big_d / num.denominator.to_big_d?

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done & force-pushed

RX14
RX14 requested changes Feb 2, 2018
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Oops

@Sija Sija force-pushed the bigdecimal-with-bigrational branch from 5477b41 to ac84c3b Compare February 2, 2018 21:25
RX14
RX14 requested changes Feb 2, 2018
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src/big/big_decimal.cr Outdated
@@ -133,6 +134,13 @@ struct BigDecimal < Number
initialize(num.to_s)
end

# Creates a new `BigDecimal` from `BigRational`.
def initialize(num : BigRational)
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but why not make this a self.new then you can just return the original number instead of copying the value and scale...

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True indeed, I've forgot about that, thx! force-pushed again

@Sija Sija force-pushed the bigdecimal-with-bigrational branch from ac84c3b to 7503522 Compare February 2, 2018 21:32
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Sija commented Feb 10, 2018

Is it GTG? Could we have a 2nd review here?

@asterite asterite merged commit ee271d8 into crystal-lang:master Feb 10, 2018
@RX14 RX14 added this to the Next milestone Feb 10, 2018
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@RX14 RX14 RX14 approved these changes

@asterite asterite asterite approved these changes

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@Sija @asterite @RX14