Bug #19566: OptionParser::on raises unsupported argument type: URI (ArgumentError) but shouldn't

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

[jgomo3 (Jesús Gómez)]

The documentation says

OptionParser comes with a few ready-to-use kinds of type coercion. They are
..

• URI – Anything accepted by URI.parse

But when I try to use the class URI as a coercion class:

op = OptionParser.new
op.on("--uri URI", URI)

I get: unsupported argument type: URI (ArgumentError).

The workaround is to register it with accept:

op = OptionParser.new
op.accept(URI, &URI.method(:parse))
op.on("--uri URI", URI)

I attached 2 files, the first one ruby-op-uri-bug.rb displays the Error.

The second one, ruby-op-uri-workaround.rb show the proper output.

[luke-gru (Luke Gruber)]

You need to require "optparse/uri". The docs should probably mention that if they don't already.

[jeremyevans0 (Jeremy Evans)]

I submitted a pull request to document the requires needed, not just for URI, but for Date/DateTime/Time/Shellwords as well: https://github.com/ruby/optparse/pull/54

• Status changed from Open to Closed

Applied in changeset git|bb927acd3bd3a5a5797587bc4201724235ed26b5.

---

[ruby/optparse] Document requires needed for Date/DateTime/Time/URI/Shellwords support

Fixes [Bug #19566]

https://github.com/ruby/optparse/commit/fb91d97c10