Feature #20759: No good API to query which parser is being used

• Status: Rejected
• Assignee: -
• Target version: -

[luke-gru (Luke Gruber)]

Right now the best way I found is:

parser = RUBY_DESCRIPTION =~ /prism/i ? "prism" : "parse.y"

This is useful if you want to invoke a subprocess with the same options given to ruby. ARGV parsing might not work because the option might have been given via RUBYOPT.

Maybe RubyVM::PARSER could be set to the current parser, and this value could either be a String or Symbol.

[luke-gru (Luke Gruber)]

• Description updated (diff)

[kddnewton (Kevin Newton)]

• Status changed from Open to Rejected

This is on purpose. This should be a transparent change and not visible to the end user. If you need to access the parser API, you can use the Prism constant directly, but otherwise it should not be accessible.

[kddnewton (Kevin Newton)]

Note that there is another discussion around retrieving command line options given here: https://bugs.ruby-lang.org/issues/6648.