class RuboCop::Cop::Lint::AmbiguousBlockAssociation

This cop checks for ambiguous block association with method when param passed without parentheses.

@example

# bad
some_method a { |val| puts val }

@example

# good
# With parentheses, there's no ambiguity.
some_method(a) { |val| puts val }

# good
# Operator methods require no disambiguation
foo == bar { |b| b.baz }

# good
# Lambda arguments require no disambiguation
foo = ->(bar) { bar.baz }

Constants

MSG

Public Instance Methods

on_csend(node)
Alias for: on_send
on_send(node) click to toggle source
# File lib/rubocop/cop/lint/ambiguous_block_association.rb, line 32
def on_send(node)
  return if !node.arguments? || node.parenthesized? ||
            node.last_argument.lambda? || allowed_method?(node)

  return unless ambiguous_block_association?(node)

  add_offense(node)
end
Also aliased as: on_csend

Private Instance Methods

allowed_method?(node) click to toggle source
# File lib/rubocop/cop/lint/ambiguous_block_association.rb, line 49
def allowed_method?(node)
  node.assignment? || node.operator_method? || node.method?(:[])
end
ambiguous_block_association?(send_node) click to toggle source
# File lib/rubocop/cop/lint/ambiguous_block_association.rb, line 44
def ambiguous_block_association?(send_node)
  send_node.last_argument.block_type? &&
    !send_node.last_argument.send_node.arguments?
end
message(send_node) click to toggle source
# File lib/rubocop/cop/lint/ambiguous_block_association.rb, line 53
def message(send_node)
  block_param = send_node.last_argument

  format(MSG, param: block_param.source,
              method: block_param.send_node.source)
end