[ruby-core:120326] [Ruby master Bug#20965] `it` vs `binding.local_variables`
From:
"tompng (tomoya ishida) via ruby-core" <ruby-core@...>
Date:
2024-12-19 09:33:14 UTC
List:
ruby-core #120326
Issue #20965 has been updated by tompng (tomoya ishida).
I have a concern of making `it` parameter an lvar.
~~~ruby
1| 42.tap do
2| p binding.local_variable_get('it')
3| it /1/i
4| p it
5| end
~~~
When parser reads `p it` at line 4, `it` turns out to be a local variable, I think from the beginning of the block(from line 2).
But on line 3, `it /1/i` is already parsed as if lvar `it` does not exist.
It is impossible to re-parse the block again, so the original implementation(it parameter is not an lvar) makes sense to me.
----------------------------------------
Bug #20965: `it` vs `binding.local_variables`
https://bugs.ruby-lang.org/issues/20965#change-111096
* Author: zverok (Victor Shepelev)
* Status: Closed
* ruby -v: ruby 3.4.0dev (2024-12-15T13:36:38Z master 366fd9642f) +PRISM [x86_64-linux]
* Backport: 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONTNEED
----------------------------------------
`it` is not available in the list of `binding.local_varaibles`, **unlike** numbered parameters:
```ruby
p(proc { binding.local_variables }.call) # []
p(proc { |x| binding.local_variables }.call) # [:x]
p(proc { _1; binding.local_variables }.call) # [:_1]
p(proc { vars = binding.local_variables; _1; vars }.call) # [:_1, :vars]
p(proc { it; binding.local_variables }.call) # []
```
I wonder if it is deliberate or accidental.
--
https://bugs.ruby-lang.org/
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