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Sass::Script::Operation

A SassScript parse node representing a binary operation, such as `$a + $b` or `“foo” + 1`.

Attributes

operand1[R]
operand2[R]
operator[R]

Public Instance Methods

children() click to toggle source

Returns the operands for this operation.

@return [Array<Node>] @see Node#children

# File lib/sass/script/operation.rb, line 54
def children
  [@operand1, @operand2]
end
deep_copy() click to toggle source

@see Node#deep_copy

# File 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
inspect() click to toggle source

@return [String] A human-readable s-expression representation of the operation

# File lib/sass/script/operation.rb, line 32
def inspect
  "(#{@operator.inspect} #{@operand1.inspect} #{@operand2.inspect})"
end
to_sass(opts = {}) click to toggle source

@see Node#to_sass

# File 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

Protected Instance Methods

_perform(environment) click to toggle source

Evaluates the operation.

@param environment [Sass::Environment] The environment in which to evaluate the SassScript @return [Literal] The SassScript object that is the value of the operation @raise [Sass::SyntaxError] if the operation is undefined for the operands

# File lib/sass/script/operation.rb, line 73
def _perform(environment)
  literal1 = @operand1.perform(environment)
  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

Public Class Methods

new(operand1, operand2, operator) click to toggle source

@param operand1 [Script::Node] The parse-tree node

for the right-hand side of the operator

@param operand2 [Script::Node] The parse-tree node

for the left-hand side of the operator

@param operator [Symbol] The operator to perform.

This should be one of the binary operator names in {Lexer::OPERATORS}
# File lib/sass/script/operation.rb, line 24
def initialize(operand1, operand2, operator)
  @operand1 = operand1
  @operand2 = operand2
  @operator = operator
  super()
end

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