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|
module Morpher
class Compiler
# Abstract error class for compiler errors
class Error < RuntimeError
include AbstractType
# Error raised when node children have incorrect amount
class NodeChildren < self
include Concord.new(:node, :expected_amount)
# Return exception message
#
# @return [String]
#
# @api private
#
def message
"Expected #{expected_amount} #{_children} for #{type}, got #{actual_amount}: #{children}"
end
private
# Return inspected type
#
# @return [String]
#
# @api private
#
def type
node.type.inspect
end
# Return actual amount of children
#
# @return [String]
#
# @api private
#
def actual_amount
children.length
end
# Return children
#
# @return [Array]
#
# @api private
#
def children
node.children
end
# Return user firendly children message
#
# @return [String]
#
# @api private
#
def _children
expected_amount.equal?(1) ? 'child' : 'children'
end
end # NodeChildren
# Error raised on compiling unknown nodes
class UnknownNode < self
include Concord.new(:type)
# Return exception error message
#
# @return [String]
#
# @api private
#
def message
"Node type: #{type.inspect} is unknown"
end
end # UnknownNode
end # Error
end # Compiler
end # Morpher
|
