Exceptions/Catch an exception thrown in a nested call: Difference between revisions

=={{header|Crystal}}==

<lang ruby>class U0 < Exception

end

class U1 < Exception

end

def foo

2.times do |i|

begin

bar(i)

rescue e : U0

puts "rescued #{e}"

end

end

end

def bar(i : Int32)

baz(i)

end

def baz(i : Int32)

raise U0.new("this is u0") if i == 0

raise U1.new("this is u1") if i == 1

end

foo</lang>

<pre>

rescued this is u0

Unhandled exception: this is u1 (U1)

from exceptions_nested.cr:28:2 in 'baz'

from exceptions_nested.cr:23:2 in 'bar'

from exceptions_nested.cr:15:7 in 'foo'

from exceptions_nested.cr:31:1 in '__crystal_main'

from /usr/local/Cellar/crystal/0.32.1/src/crystal/main.cr:97:5 in 'main_user_code'

from /usr/local/Cellar/crystal/0.32.1/src/crystal/main.cr:86:7 in 'main'

from /usr/local/Cellar/crystal/0.32.1/src/crystal/main.cr:106:3 in 'main'

</pre>