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# frozen_string_literal: true
module RuboCop
module AST
# A node extension for `case` nodes. This will be used in place of a plain
# node when the builder constructs the AST, making its methods available
# to all `case` nodes within RuboCop.
class CaseNode < Node
include ConditionalNode
# Returns the keyword of the `case` statement as a string.
#
# @return [String] the keyword of the `case` statement
def keyword
'case'
end
# @deprecated Use `when_branches.each`
def each_when(&block)
return when_branches.to_enum(__method__) unless block_given?
when_branches.each(&block)
self
end
# Returns an array of all the when branches in the `case` statement.
#
# @return [Array<WhenNode>] an array of `when` nodes
def when_branches
node_parts[1...-1]
end
# Returns an array of all the when branches in the `case` statement.
#
# @return [Array<Node, nil>] an array of the bodies of the when branches
# and the else (if any). Note that these bodies could be nil.
def branches
bodies = when_branches.map(&:body)
bodies.push(else_branch) if else?
bodies
end
# Returns the else branch of the `case` statement, if any.
#
# @return [Node] the else branch node of the `case` statement
# @return [nil] if the case statement does not have an else branch.
def else_branch
node_parts[-1]
end
# Checks whether this case statement has an `else` branch.
#
# @return [Boolean] whether the `case` statement has an `else` branch
def else?
loc.else
end
end
end
end
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