Extract Symbols

extract.rb

This example demonstrates how to extract symbols using the index. An instance of class Decode::Index is used for loading symbols from source code files. These symbols are available as a flat list and as a trie structure. You can look up specific symbols using a reference using Decode::Index#lookup.

require_relative '../../lib/decode/index'

Firstly, construct the index:

index = Decode::Index.new

Then, update the index by loading paths from the file system:

paths = Dir.glob(File.expand_path("../../lib/**/*.rb", __dir__))
index.update(paths)

Finally, you can print out the loaded symbols:

index.definitions.each do |name, symbol|
	puts symbol.long_form
end

Lookup a specific symbol:

absolute_reference = Decode::Language::Ruby.reference_for("Decode::Index#lookup")
lookup_symbol = index.lookup(absolute_reference).first
puts lookup_symbol.long_form

Lookup a method relative to that symbol:

relative_reference = Decode::Language::Ruby.reference_for("trie")
trie_attribute = index.lookup(relative_reference, relative_to: lookup_symbol).first
puts trie_attribute.long_form