| 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