Class | Sass::Script::UnaryOperation |
In: |
lib/sass/script/unary_operation.rb
|
Parent: | Node |
A SassScript parse node representing a unary operation, such as `-!b` or `not true`.
Currently only `-`, `/`, and `not` are unary operators.
@param operand [Script::Node] The parse-tree node
for the object of the operator
@param operator [Symbol] The operator to perform
# File lib/sass/script/unary_operation.rb, line 10 10: def initialize(operand, operator) 11: @operand = operand 12: @operator = operator 13: end
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 operand
# File lib/sass/script/unary_operation.rb, line 25 25: def perform(environment) 26: operator = "unary_#{@operator}" 27: literal = @operand.perform(environment) 28: literal.send(operator) 29: rescue NoMethodError => e 30: raise e unless e.name.to_s == operator.to_s 31: raise Sass::SyntaxError.new("Undefined unary operation: \"#{@operator} #{literal}\".") 32: end