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Use Prism::Translation::ParserCurrent in prism docs #1073

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17 changes: 4 additions & 13 deletions doc/PRISM_TRANSLATION.md
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Original file line number Diff line number Diff line change
Expand Up @@ -32,26 +32,17 @@ RUBY

## Using `prism` when parsing ruby for the currently running Ruby version

If you are using `Parser::CurrentRuby`, you need to do similar branching logic. Do note that `prism` has no concept of a parser for the currently executing ruby version. As an alternative, you can manually extract the necessary version from the `RUBY_VERSION` constant:
If you are using `Parser::CurrentRuby`, you need to do similar branching logic:

```rb
def parser_for_current_ruby
code_version = RUBY_VERSION.to_f

if code_version <= 3.3
if Gem::Version.new(RUBY_VERSION) <= '3.3'
require 'parser/current'
Parser::CurrentRuby
else
require 'prism'
case code_version
when 3.3
Prism::Translation::Parser33
when 3.4
Prism::Translation::Parser34
else
warn "Unknown Ruby version #{code_version}, using 3.4 as a fallback"
Prism::Translation::Parser34
end
# Only available on prism > 1.4.0
Prism::Translation::ParserCurrent
end
end

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