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module TomlRB
class Table
def initialize(dotted_keys)
@dotted_keys = dotted_keys
end
def navigate_keys(hash, visited_keys, symbolize_keys = false)
ensure_key_not_defined(visited_keys)
current = hash
keys = symbolize_keys ? @dotted_keys.map(&:to_sym) : @dotted_keys
keys.each_with_index do |key, index|
current[key] = {} unless current.key?(key)
element = current[key]
# If this is the final key and it's already an array (from [[key]]), that's invalid
is_final_key = (index == keys.length - 1)
if is_final_key && element.is_a?(Array)
fail ValueOverwriteError.new(key)
end
current = element.is_a?(Array) ? element.last : element
# check that key has not been defined before as a scalar value
fail ValueOverwriteError.new(key) unless current.is_a?(Hash)
end
current
end
def accept_visitor(parser)
parser.visit_table self
end
def full_key
@dotted_keys.join(".")
end
private
# Fail if the key was already defined with a ValueOverwriteError
def ensure_key_not_defined(visited_keys)
fail ValueOverwriteError.new(full_key) if visited_keys.include?(full_key)
visited_keys << full_key
end
end
# Used in document.citrus
module TableParser
def value
TomlRB::Table.new(captures[:stripped_key].map(&:value).first)
end
end
end
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