Class: Sass::Script::Operation

Inherits:

Node

• Object
• Node
• Sass::Script::Operation

show all

Defined in:

/var/www/sass-pages/.sass/lib/sass/script/operation.rb

Overview

Instance Attribute Summary

• - operand1 readonly Returns the value of attribute operand1.
• - operand2 readonly Returns the value of attribute operand2.
• - operator readonly Returns the value of attribute operator.

Instance Method Summary

• - (Literal) _perform(environment) protected Evaluates the operation.
• - (Array<Node>) children Returns the operands for this operation.
• - deep_copy
• - (Operation) initialize(operand1, operand2, operator) constructor A new instance of Operation.
• - (String) inspect A human-readable s-expression representation of the operation.
• - to_sass(opts = {})

Methods inherited from Node

#dasherize, #opts, #perform

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# File '/var/www/sass-pages/.sass/lib/sass/script/operation.rb', line 24

def initialize(operand1, operand2, operator)
  @operand1 = operand1
  @operand2 = operand2
  @operator = operator
  super()
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/operation.rb', line 14

def operand1
  @operand1
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/operation.rb', line 15

def operand2
  @operand2
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/operation.rb', line 16

def operator
  @operator
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/operation.rb', line 73

def _perform(environment)
  literal1 = @operand1.perform(environment)

  # Special-case :and and :or to support short-circuiting.
  if @operator == :and
    return literal1.to_bool ? @operand2.perform(environment) : literal1
  elsif @operator == :or
    return literal1.to_bool ? literal1 : @operand2.perform(environment)
  end

  literal2 = @operand2.perform(environment)

  begin
    opts(literal1.send(@operator, literal2))
  rescue NoMethodError => e
    raise e unless e.name.to_s == @operator.to_s
    raise Sass::SyntaxError.new("Undefined operation: \"#{literal1} #{@operator} #{literal2}\".")
  end
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/operation.rb', line 54

def children
  [@operand1, @operand2]
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/operation.rb', line 59

def deep_copy
  node = dup
  node.instance_variable_set('@operand1', @operand1.deep_copy)
  node.instance_variable_set('@operand2', @operand2.deep_copy)
  node
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/operation.rb', line 32

def inspect
  "(#{@operator.inspect} #{@operand1.inspect} #{@operand2.inspect})"
end

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# File '/var/www/sass-pages/.sass/lib/sass/script/operation.rb', line 37

def to_sass(opts = {})
  pred = Sass::Script::Parser.precedence_of(@operator)
  o1 = operand_to_sass @operand1, :left, opts
  o2 = operand_to_sass @operand2, :right, opts
  sep =
    case @operator
    when :comma; ", "
    when :space; " "
    else; " #{Lexer::OPERATORS_REVERSE[@operator]} "
    end
  "#{o1}#{sep}#{o2}"
end