From: Richard Kilmer <rich@...>
Date: 2003-01-16T23:26:48+09:00
Subject: Re: [ANN] YAML.rb 0.49.1 -- Perfecting the parser, new merge indicator, base60

I tried to run the test suite against this on the Ruby (1.6.7) that 
comes with OS X.  It dies with a "stack level too deep" exception.  
Without this working, FreeRIDE does not work :-( The output looks like:

--BEGIN

[singlemalt:~/Desktop/yamlrb-0.49.1/yts] rich% ./test.sh
--- %YAML:1.0
file: YtsAnchorAlias.yml
test: Simple Alias Example
success: (yes)
round-trip: (yes)
time: 0.009627
---
file: YtsAnchorAlias.yml
test: Alias of a Mapping
success: (yes)
round-trip: (yes)
time: 0.008456
---
file: YtsErrorTests.yml
test: Missing value for hash item
success: (no)
round-trip: (no)
reason: |
   No Ruby parse information available in the test document.
---
file: YtsErrorTests.yml
test: Not indenting enough
success: (no)
round-trip: (no)
reason: |
   No Ruby parse information available in the test document.
---
file: YtsRubyTests.yml
test: Symbols
success: (yes)
round-trip: (yes)
time: 0.027503
---
file: YtsRubyTests.yml
test: Ranges
success: (yes)
round-trip: (yes)
time: 0.017929
---
file: YtsRubyTests.yml
test: Regexps
success: (yes)
round-trip: (yes)
time: 0.070336
---
file: YtsRubyTests.yml
test: Perl Regexps
success: (yes)
round-trip: (yes)
time: 0.005660
---
file: YtsRubyTests.yml
test: Struct class
success: (yes)
round-trip: (yes)
time: 0.011653
src/emitter.rb:974:in `detect_implicit': stack level too deep 
(SystemStackError)
         from src/emitter.rb:974:in `detect'
         from src/emitter.rb:974:in `each'
         from src/emitter.rb:974:in `detect'
         from src/emitter.rb:974:in `detect_implicit'
         from src/emitter.rb:973:in `each'
         from src/emitter.rb:973:in `detect_implicit'
         from src/emitter.rb:1617:in `to_yaml'
         from src/emitter.rb:1605:in `call'
          ... 34 levels...
         from src/emitter.rb:797:in `load_documents'
         from yts.rb:47
         from yts.rb:41:in `each'
         from yts.rb:41

---END

On Monday, January 13, 2003, at 01:50  AM, why the lucky stiff wrote:

> YAML.rb 0.49.1 now out.  [http://yaml4r.sf.net/]
>
> This version includes a few fixes to work better with Windows and
> various versions of Ruby.  We're parsing better than ever.  And I've
> even got a few new features for ya.
>
>   - The merge indicator is now '<<'.  If you're not familiar with
>     this indicator, that's because it was quietly introduced in
>     0.49.  A merge will mix mapping elements into another mapping:
>
>       mapping:
>         name: Joe
>         job: Accountant
>         <<:
>           age: 38
>
>     The above document comes out as a Ruby Hash:
>
>       { 'mapping' =>
>         { 'name' => 'Joe',
>           'job' => 'Accountant',
>           'age' => 38
>         }
>       }
>
>     As you can see the deeper hash is merged into the hash containing
>     the merge key.  This is very useful for inheritance:
>
>       - &ACCOUNTANT
>         job: Accountant
>         hourly_rate: 150
>
>       - name: Joe
>         <<: *ACCOUNTANT
>
>       - name: Mike
>         <<: *ACCOUNTANT
>
>     You can mixin multiple mappings as well.  See
>     http://yaml.org/type/merge for the full specification in the
>     YAML type repository.
>
>   - Base60 added for time and degrees representation.
>
>       the following are equal:
>         - 1:30
>         - 90
>       these two are equal as well:
>         - 190:20:30
>         - 685230    # = 190 h 20 m 30 s
>
>     This will show up at http://yaml.org/type/int in a few days.
>
> Nice little features long requested on yaml-core.  Enjoy 0.49.1.  
> Please
> contact me with your bug reports and assistance.  I'd like 0.50 to be a
> solid package, which is only possible with your kind help.
>
> _why
>
>
>