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30 lines
690 B
Ruby
30 lines
690 B
Ruby
require 'sass/constant/string'
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require 'sass/constant/number'
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require 'sass/constant/color'
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module Sass::Constant
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class Operation
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def initialize(operand1, operand2, operator)
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@operand1 = operand1
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@operand2 = operand2
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@operator = operator
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end
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def to_s
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self.perform.to_s
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end
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protected
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def perform
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literal1 = @operand1.perform
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literal2 = @operand2.perform
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begin
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literal1.send(@operator, literal2)
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rescue NoMethodError => e
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raise e unless e.name == @operator
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raise Sass::SyntaxError.new("Undefined operation: \"#{literal1} #{@operator} #{literal2}\"")
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end
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end
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end
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end
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