class RuboCop::Cop::Style::LambdaCall
This cop checks for use of the lambda.(args) syntax.
@example EnforcedStyle: call (default)
# bad lambda.(x, y) # good lambda.call(x, y)
@example EnforcedStyle: braces
# bad lambda.call(x, y) # good lambda.(x, y)
Public Instance Methods
autocorrect(node)
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# File lib/rubocop/cop/style/lambda_call.rb, line 34 def autocorrect(node) lambda do |corrector| if explicit_style? receiver = node.receiver.source replacement = node.source.sub("#{receiver}.", "#{receiver}.call") corrector.replace(node.source_range, replacement) else add_parentheses(node, corrector) unless node.parenthesized? corrector.remove(node.loc.selector) end end end
on_send(node)
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# File lib/rubocop/cop/style/lambda_call.rb, line 24 def on_send(node) return unless node.receiver && node.method?(:call) if offense?(node) add_offense(node) { opposite_style_detected } else correct_style_detected end end
Private Instance Methods
add_parentheses(node, corrector)
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# File lib/rubocop/cop/style/lambda_call.rb, line 55 def add_parentheses(node, corrector) if node.arguments.empty? corrector.insert_after(node.source_range, '()') else corrector.replace(args_begin(node), '(') corrector.insert_after(args_end(node), ')') end end
args_begin(node)
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# File lib/rubocop/cop/style/lambda_call.rb, line 64 def args_begin(node) loc = node.loc selector = node.super_type? || node.yield_type? ? loc.keyword : loc.selector selector.end.resize(1) end
args_end(node)
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# File lib/rubocop/cop/style/lambda_call.rb, line 71 def args_end(node) node.loc.expression.end end
explicit_style?()
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# File lib/rubocop/cop/style/lambda_call.rb, line 87 def explicit_style? style == :call end
implicit_style?()
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# File lib/rubocop/cop/style/lambda_call.rb, line 83 def implicit_style? style == :braces end
message(_node)
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# File lib/rubocop/cop/style/lambda_call.rb, line 75 def message(_node) if explicit_style? 'Prefer the use of `lambda.call(...)` over `lambda.(...)`.' else 'Prefer the use of `lambda.(...)` over `lambda.call(...)`.' end end
offense?(node)
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# File lib/rubocop/cop/style/lambda_call.rb, line 50 def offense?(node) explicit_style? && node.implicit_call? || implicit_style? && !node.implicit_call? end