Class: RuboCop::Cop::Performance::BigDecimalWithNumericArgument

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector
Defined in:
lib/rubocop/cop/performance/big_decimal_with_numeric_argument.rb

Overview

Identifies places where numeric argument to BigDecimal should be converted to string. Initializing from String is faster than from Numeric for BigDecimal.

Examples:

# bad
BigDecimal(1, 2)
4.to_d(6)
BigDecimal(1.2, 3, exception: true)
4.5.to_d(6, exception: true)

# good
BigDecimal('1', 2)
BigDecimal('4', 6)
BigDecimal('1.2', 3, exception: true)
BigDecimal('4.5', 6, exception: true)

Constant Summary collapse

MSG = 
'Convert numeric literal to string and pass it to `BigDecimal`.'
RESTRICT_ON_SEND = 
%i[BigDecimal to_d].freeze

Instance Method Summary collapse

Instance Method Details

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/performance/big_decimal_with_numeric_argument.rb', line 37

def on_send(node)
  if (numeric = big_decimal_with_numeric_argument?(node))
    add_offense(numeric.source_range) do |corrector|
      corrector.wrap(numeric, "'", "'")
    end
  elsif (numeric_to_d = to_d?(node))
    add_offense(numeric_to_d.source_range) do |corrector|
      big_decimal_args = node.arguments.map(&:source).unshift("'#{numeric_to_d.source}'").join(', ')

      corrector.replace(node, "BigDecimal(#{big_decimal_args})")
    end
  end
end