class RuboCop::Cop::Lint::ParenthesesAsGroupedExpression
Checks for space between a the name of a called method and a left parenthesis.
@example
# bad puts (x + y)
@example
# good puts(x + y)
Constants
- MSG
Public Instance Methods
on_send(node)
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# File lib/rubocop/cop/lint/parentheses_as_grouped_expression.rb, line 22 def on_send(node) return unless node.arguments.one? return if node.operator_method? || node.setter_method? return unless node.first_argument.source.start_with?('(') space_length = spaces_before_left_parenthesis(node) return unless space_length > 0 range = space_range(node.first_argument.source_range, space_length) add_offense(nil, location: range) end
Private Instance Methods
space_range(expr, space_length)
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# File lib/rubocop/cop/lint/parentheses_as_grouped_expression.rb, line 54 def space_range(expr, space_length) range_between(expr.begin_pos - space_length, expr.begin_pos) end
spaces_before_left_parenthesis(node)
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# File lib/rubocop/cop/lint/parentheses_as_grouped_expression.rb, line 38 def spaces_before_left_parenthesis(node) receiver = node.receiver receiver_length = if receiver receiver.source.length else 0 end without_receiver = node.source[receiver_length..-1] # Escape question mark if any. method_regexp = Regexp.escape(node.method_name) match = without_receiver.match(/^\s*\.?\s*#{method_regexp}(\s+)\(/) match ? match.captures[0].length : 0 end