[wip]Introduce rbs and add a type definition file for processing.rb first

Gemfile

@@ -5,6 +5,13 @@ source 'https://rubygems.org'
 # Specify your gem's dependencies in youplot.gemspec
 gemspec
 
+group :development do
+ if RUBY_VERSION >= '3.0'
+ gem 'steep', require: false
+ gem 'typeprof'
+ end
+end
+
 group :test do
  gem 'rake'
  gem 'simplecov'

Steepfile

@@ -0,0 +1,8 @@
+D = Steep::Diagnostic
+
+target :lib do
+ signature "sig"
+ check "lib" # Directory name to check
+
+ configure_code_diagnostics(D::Ruby.silent) # `silent` diagnostics setting
+end

sig/youplot/backends/processing.rbs

@@ -0,0 +1,7 @@
+module YouPlot
+ module Backends
+ module Processing
+ def count_values: ([], ?tally: true, ?reverse: false) -> Array[Array[untyped]]
+ end
+ end
+end