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parse.y: else without rescue

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* parse.y (bodystmt): [EXPERIMENTAL] make `else` without `rescue`
  a syntax error.  [DevelopersMeeting20180315Japan]

  https://bugs.ruby-lang.org/projects/ruby/wiki/DevelopersMeeting20180315Japan
  https://docs.google.com/document/d/1RT0ijSo8uJ4Awn3CEvuYkjH0TVeXSYgeAFNmVGYC3ak/edit#
  > * do-else-end
  >   https://twitter.com/joker1007/status/974173396006129664
  >   https://twitter.com/joker1007/status/974173641347756032
  >   https://twitter.com/joker1007/status/974176512554369027
  >   Will be SyntaxError in 2.6-preview2
  >   All of begin/do/def (experimental)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62901 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-03-23 00:40:08 +00:00
parent 631272ff15
commit 140512d222
4 changed files with 17 additions and 8 deletions
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18
spec/ruby/language/rescue_spec.rb
View file

@ -195,18 +195,26 @@ describe "The rescue keyword" do
ScratchPad.recorded.should == [:one, :else_ran, :ensure_ran, :outside_begin]
end
it "will execute an else block even without rescue and ensure" do
lambda {
eval <<-ruby
else_without_rescue = lambda {
eval <<-ruby
begin
ScratchPad << :begin
else
ScratchPad << :else
end
ruby
}.should complain(/else without rescue is useless/)
}
ScratchPad.recorded.should == [:begin, :else]
ruby_version_is ""..."2.6" do
it "will execute an else block even without rescue and ensure" do
else_without_rescue.should complain(/else without rescue is useless/)
ScratchPad.recorded.should == [:begin, :else]
end
end
ruby_version_is "2.6" do
else_without_rescue.should raise_error(SyntaxError)
end
it "will not execute an else block if an exception was raised" do