class Keisan::AST::Cache

Public Class Methods

new() click to toggle source
# File lib/keisan/ast/cache.rb, line 4
def initialize
  @cache = {}
end

Public Instance Methods

fetch_or_build(string) click to toggle source
# File lib/keisan/ast/cache.rb, line 8
def fetch_or_build(string)
  return @cache[string] if @cache.has_key?(string)

  build_from_scratch(string).tap do |ast|
    unless frozen?
      # Freeze the AST to keep it from changing in the cache
      ast.freeze
      @cache[string] = ast
    end
  end
end
has_key?(string) click to toggle source
# File lib/keisan/ast/cache.rb, line 20
def has_key?(string)
  @cache.has_key?(string)
end

Private Instance Methods

build_from_scratch(string) click to toggle source
# File lib/keisan/ast/cache.rb, line 26
def build_from_scratch(string)
  Builder.new(string: string).ast
end