diff options
| author | Kevin Newton <[email protected]> | 2024-02-23 14:43:20 -0500 |
|---|---|---|
| committer | git <[email protected]> | 2024-02-23 20:02:19 +0000 |
| commit | ec6532b458b34e907a2474bab70642414bbb0d05 (patch) | |
| tree | 38639f44e86397f4202ae5ebe74a0989e955c652 /lib/prism/debug.rb | |
| parent | ce8531fed4c7295aee94d24124914441db578136 (diff) | |
[ruby/prism] Add some encoding debugging to make testing easier
https://github.com/ruby/prism/commit/0c042561c6
Diffstat (limited to 'lib/prism/debug.rb')
| -rw-r--r-- | lib/prism/debug.rb | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/lib/prism/debug.rb b/lib/prism/debug.rb index c888436e4d..553205a04b 100644 --- a/lib/prism/debug.rb +++ b/lib/prism/debug.rb @@ -202,5 +202,48 @@ module Prism def self.newlines(source) Prism.parse(source).source.offsets end + + # A wrapping around prism's internal encoding data structures. This is used + # for reflection and debugging purposes. + class Encoding + # The name of the encoding, that can be passed to Encoding.find. + attr_reader :name + + # Initialize a new encoding with the given name and whether or not it is + # a multibyte encoding. + def initialize(name, multibyte) + @name = name + @multibyte = multibyte + end + + # Whether or not the encoding is a multibyte encoding. + def multibyte? + @multibyte + end + + # Returns the number of bytes of the first character in the source string, + # if it is valid for the encoding. Otherwise, returns 0. + def width(source) + Encoding._width(name, source) + end + + # Returns true if the first character in the source string is a valid + # alphanumeric character for the encoding. + def alnum?(source) + Encoding._alnum?(name, source) + end + + # Returns true if the first character in the source string is a valid + # alphabetic character for the encoding. + def alpha?(source) + Encoding._alpha?(name, source) + end + + # Returns true if the first character in the source string is a valid + # uppercase character for the encoding. + def upper?(source) + Encoding._upper?(name, source) + end + end end end |