[ruby-core:119302] [Ruby master Bug#20761] [DOC] `RubyVM::AbstractSyntaxTree.of` examples raise because parser is prism by default

Issue #20761 has been updated by kddnewton (Kevin Newton).

Status changed from Open to Closed

This is expected behavior. The instruction sequences will have different node ids, so it's not possible to retrieve the RubyVM::AbstractSyntaxTree representation of the AST. If you want to retrieve the Prism AST, you can do so using `Prism.parse` in the same way that error highlight does here: https://github.com/ruby/error_highlight/blob/452f78640c08ab277683416668a52d9fcfb6a26a/lib/error_highlight/base.rb#L57-L66.

----------------------------------------
Bug #20761: [DOC] `RubyVM::AbstractSyntaxTree.of` examples raise because parser is prism by default
https://bugs.ruby-lang.org/issues/20761#change-109913

* Author: Earlopain (A S)
* Status: Closed
* ruby -v: 3.4-dev
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
https://docs.ruby-lang.org/en/master/RubyVM/AbstractSyntaxTree.html#method-c-of

```rb
RubyVM::AbstractSyntaxTree.of(proc {1 + 2})
# => <internal:ast>:97:in 'RubyVM::AbstractSyntaxTree.of': cannot get AST for ISEQ compiled by prism (RuntimeError)
```

Same for the method example. Is this method even functional when prism is used, or is the prism gem able to do this somehow?



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