From: "Dan0042 (Daniel DeLorme) via ruby-core" Date: 2023-03-13T12:52:37+00:00 Subject: [ruby-core:112863] [Ruby master Bug#19485] Unexpected behavior in squiggly heredocs Issue #19485 has been updated by Dan0042 (Daniel DeLorme). I think what's happening here is that tabs are not converted directly to 8 spaces, but to "move ahead to next multiple of 8 chars". So in that sense "\t" and " \t" are equivalent. It's the same behavior as `10.times{ |i| print " "*i,"\t",i,"\n" }` ---------------------------------------- Bug #19485: Unexpected behavior in squiggly heredocs https://bugs.ruby-lang.org/issues/19485#change-102379 * Author: jemmai (Jemma Issroff) * Status: Open * Priority: Normal * ruby -v: 3.2.1 * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- Based on [the squiggly heredoc documentation](https://ruby-doc.org/3.2.1/syntax/literals_rdoc.html), I found the following to be unexpected behavior. Explicitly, the documentation specifies, "The indentation of the least-indented line will be removed from each line of the content." After running: ```ruby File.write("test.rb", "p <<~EOF\n\ta\n b\nEOF\n") ``` and then `ruby test.rb`, I get the following output: ``` "\ta\nb\n" ``` The least-indented line above is ` b`, however, no leading whitespace is removed from the line containing `\ta`. For another example: ```ruby File.write("test.rb", "p <<~EOF\n\tA\n \tB\nEOF\n") ``` `ruby test.rb` gives: ``` "A\nB\n" ``` In this case, the `\t` was removed from the line containing `A`, but more whitespace than that (` \t`) was removed from the line containing `B`. After seeing the first example, I assumed that the documentation was out of date, and that I should fix it to read that `\t` would never be converted into space characters in order to remove leading whitespace. But after the second example, it seems like this is a bug in removing leading whitespace. Can someone please explain what the rules should be on squiggly heredocs? I can implement a fix to adhere to the rules, or can update the documentation, I am just unsure of what the rules should be because the above two examples reflect unexpected behavior in two distinct ways. -- https://bugs.ruby-lang.org/ ______________________________________________ ruby-core mailing list -- ruby-core@ml.ruby-lang.org To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org ruby-core info -- https://ml.ruby-lang.org/mailman3/postorius/lists/ruby-core.ml.ruby-lang.org/