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# frozen_string_literal: true
module Gitlab
module Ci
module Pipeline
module Expression
module Lexeme
class Operator < Lexeme::Base
# This operator class is design to handle single operators that take two
# arguments. Expression::Parser was originally designed to read infix operators,
# and so the two operands are called "left" and "right" here. If we wish to
# implement an Operator that takes a greater or lesser number of arguments, a
# structural change or additional Operator superclass will likely be needed.
OperatorError = Class.new(Expression::ExpressionError)
def initialize(left, right)
raise OperatorError, 'Invalid left operand' unless left.respond_to? :evaluate
raise OperatorError, 'Invalid right operand' unless right.respond_to? :evaluate
@left = left
@right = right
end
def self.type
:operator
end
def self.precedence
raise NotImplementedError
end
end
end
end
end
end
end
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