Class: Sass::Script::Operation

Inherits:
Node show all
Defined in:
lib/sass/script/operation.rb

Overview

A SassScript parse node representing a binary operation, such as !a + !b or "foo" + 1.

Instance Method Summary collapse

Constructor Details

#initialize(operand1, operand2, operator) ⇒ Operation

Returns a new instance of Operation.

Parameters:

  • operand1 (Script::Node) —

    The parse-tree node for the right-hand side of the operator

  • operand2 (Script::Node) —

    The parse-tree node for the left-hand side of the operator

  • operator (Symbol) —

    The operator to perform. This should be one of the binary operator names in Lexer::OPERATORS



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# File 'lib/sass/script/operation.rb', line 18

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

Instance Method Details

#inspect ⇒ String

Returns A human-readable s-expression representation of the operation.

Returns:

  • (String) —

    A human-readable s-expression representation of the operation



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# File 'lib/sass/script/operation.rb', line 25

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

#perform(environment) ⇒ Literal

Evaluates the operation.

Parameters:

  • environment (Sass::Environment) —

    The environment in which to evaluate the SassScript

Returns:

  • (Literal) —

    The SassScript object that is the value of the operation

Raises:



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# File 'lib/sass/script/operation.rb', line 34

def perform(environment)
  literal1 = @operand1.perform(environment)
  literal2 = @operand2.perform(environment)
  begin
    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