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Contents
# encoding: utf-8
module RuboCop
module Cop
module Style
# This cop checks for usage of the %q/%Q syntax when '' or "" would do.
class UnneededPercentQ < Cop
MSG = 'Use `%s` only for strings that contain both single quotes and ' \
'double quotes%s.'
def on_dstr(node)
# Using %Q to avoid escaping inner " is ok.
check(node) unless node.loc.expression.source =~ /"/
end
def on_str(node)
check(node)
end
# We process regexp nodes because the inner str nodes can cause
# confusion in on_str if they start with %( or %Q(.
def on_regexp(node)
string_parts = node.children.select { |child| child.type == :str }
string_parts.each { |s| ignore_node(s) }
end
private
def check(node)
if node.loc.respond_to?(:heredoc_body)
ignore_node(node)
return
end
return if ignored_node?(node) || part_of_ignored_node?(node)
src = node.loc.expression.source
return unless src =~ /^%q/i
return if src =~ /'/ && src =~ /"/
return if src =~ StringHelp::ESCAPED_CHAR_REGEXP
extra = if src =~ /^%Q/
', or for dynamic strings that contain double quotes'
else
''
end
add_offense(node, :expression, format(MSG, src[0, 2], extra))
end
def autocorrect(node)
delimiter = node.loc.expression.source =~ /^%Q[^"]+$|'/ ? '"' : "'"
@corrections << lambda do |corrector|
corrector.replace(node.loc.begin, delimiter)
corrector.replace(node.loc.end, delimiter)
end
end
end
end
end
end
Version data entries
5 entries across 5 versions & 2 rubygems