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Contents
require 'set'
require 'sass/script/string'
require 'sass/script/number'
require 'sass/script/color'
require 'sass/script/functions'
require 'sass/script/unary_operation'
module Sass::Script
# A SassScript parse node representing a binary operation,
# such as `!a + !b` or `"foo" + 1`.
class Operation < Node
# @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}
def initialize(operand1, operand2, operator)
@operand1 = operand1
@operand2 = operand2
@operator = operator
end
# @return [String] A human-readable s-expression representation of the operation
def inspect
"(#{@operator.inspect} #{@operand1.inspect} #{@operand2.inspect})"
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 operands
def perform(environment)
literal1 = @operand1.perform(environment)
literal2 = @operand2.perform(environment)
begin
res = literal1.send(@operator, literal2)
res.options = environment.options
res
rescue NoMethodError => e
raise e unless e.name.to_s == @operator.to_s
raise Sass::SyntaxError.new("Undefined operation: \"#{literal1} #{@operator} #{literal2}\".")
end
end
# Returns the operands for this operation.
#
# @return [Array<Node>]
# @see Node#children
def children
[@operand1, @operand2]
end
end
end
Version data entries
31 entries across 31 versions & 1 rubygems