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# frozen_string_literal: true
module Liquid
class RangeLookup
def self.parse(start_markup, end_markup, string_scanner, cache = nil)
start_obj = Expression.parse(start_markup, string_scanner, cache)
end_obj = Expression.parse(end_markup, string_scanner, cache)
if start_obj.respond_to?(:evaluate) || end_obj.respond_to?(:evaluate)
new(start_obj, end_obj)
else
begin
start_obj.to_i..end_obj.to_i
rescue NoMethodError
invalid_expr = start_markup unless start_obj.respond_to?(:to_i)
invalid_expr ||= end_markup unless end_obj.respond_to?(:to_i)
if invalid_expr
raise Liquid::SyntaxError, "Invalid expression type '#{invalid_expr}' in range expression"
end
raise
end
end
end
attr_reader :start_obj, :end_obj
def initialize(start_obj, end_obj)
@start_obj = start_obj
@end_obj = end_obj
end
def evaluate(context)
start_int = to_integer(context.evaluate(@start_obj))
end_int = to_integer(context.evaluate(@end_obj))
start_int..end_int
end
private
def to_integer(input)
case input
when Integer
input
when NilClass, String
input.to_i
else
Utils.to_integer(input)
end
end
class ParseTreeVisitor < Liquid::ParseTreeVisitor
def children
[@node.start_obj, @node.end_obj]
end
end
end
end
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