| Age | Commit message (Collapse) | Author |
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Also implement the following changes.
* Add tests
* Use `Object#equal?` to compare tags for Ruby compatibility
* Use `attr_reader`
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### Example
```ruby
begin
throw 1
rescue Exception => e
puts e.message
end
```
#### Before this patch:
```console
$ bin/mruby example.rb
uncaught throw :1
```
#### After this patch (same as Ruby):
```console
$ bin/mruby example.rb
uncaught throw 1
```
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Implements `catch`/`throw` non-local jump inherited from Lisp.
`catch([tag]) {|tag| block } -> obj`
Example:
```
catch(:foo) { 123 } # => 123
catch(:foo) { throw(:foo, 456) } # => 456
catch(:foo) { throw(:foo) } # => nil
```
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