Contents

module Opal
  # ParserScope is used during lexing to keep track of local variables
  # created inside a scope. A lexer scope can be asked if it has a local
  # variable defined, and it can also check its parent scope if applicable.
  class ParserScope
    attr_reader :locals
    attr_accessor :parent

    def initialize(type)
      @block  = type == :block
      @locals = []
      @parent = nil
    end

    def add_local(local)
      @locals << local
    end

    def has_local?(local)
      return true if @locals.include? local
      return @parent.has_local?(local) if @parent and @block
      false
    end
  end
end

Version data entries

13 entries across 13 versions & 2 rubygems

Version	Path
opal-0.7.0.beta3	lib/opal/parser/parser_scope.rb
opal-0.6.3	lib/opal/parser/parser_scope.rb
opal-0.7.0.beta2	lib/opal/parser/parser_scope.rb
opal-cj-0.7.0.beta2	lib/opal/parser/parser_scope.rb
opal-cj-0.7.0.beta1	lib/opal/parser/parser_scope.rb
opal-0.7.0.beta1	lib/opal/parser/parser_scope.rb
opal-0.6.2	lib/opal/parser/parser_scope.rb
opal-0.6.1	lib/opal/parser/parser_scope.rb
opal-0.6.0	lib/opal/parser/parser_scope.rb
opal-0.5.5	lib/opal/parser/parser_scope.rb
opal-0.5.4	lib/opal/parser/parser_scope.rb
opal-0.5.2	lib/opal/parser/parser_scope.rb
opal-0.5.0	lib/opal/parser/parser_scope.rb