Class: YARD::Handlers::Ruby::Legacy::ClassConditionHandler

### Home Classes Methods

### In Files

- lib/yard/handlers/ruby/legacy/class_condition_handler.rb

### Parent

YARD::Handlers::Ruby::Legacy::Base

### Methods

- #parse_condition
- #parse_else_block
- #parse_then_block

### Files

- LICENSE.txt
- MIT.txt

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# YARD::Handlers::Ruby::Legacy::ClassConditionHandler

(see Ruby::ClassConditionHandler) @since 0.5.4

### Protected Instance Methods

parse_condition() click to toggle source

Parses the condition part of the if/unless statement

@return [true, false, nil] true if the condition can be definitely

    parsed to true, false if not, and nil if the condition cannot be
    parsed with certainty (it's dynamic)

@since 0.5.5

    # File lib/yard/handlers/ruby/legacy/class_condition_handler.rb, line 28
    def parse_condition
      condition = nil

      # Right now we can handle very simple unary conditions like:
      #   if true
      #   if false
      #   if 0
      #   if 100 (not 0)
      #   if defined? SOME_CONSTANT
      #
      # The last case will do a lookup in the registry and then one
      # in the Ruby world (using eval).
      case statement.tokens[1..-1].to_s.strip
      when /^(\d+)$/
        condition = $1 != "0"
      when /^defined\?\s*\(?(.+?)\)?$/
        # defined? keyword used, let's see if we can look up the name
        # in the registry, then we'll try using Ruby's powers. eval() is not
        # *too* dangerous here since code is not actually executed.
        name = $1
        obj = YARD::Registry.resolve(namespace, name, true)
        begin
          condition = true if obj || Object.instance_eval("defined? #{name}")
        rescue SyntaxError, NameError
          condition = false
        end
      when "true"
        condition = true
      when "false"
        condition = false
      end

      if TkUNLESS === statement.tokens.first
        condition = !condition if condition != nil
      end
      condition
    end

parse_else_block() click to toggle source

@since 0.5.5

    # File lib/yard/handlers/ruby/legacy/class_condition_handler.rb, line 72
    def parse_else_block
      return unless statement.block
      stmtlist = YARD::Parser::Ruby::Legacy::StatementList
      stmtlist.new(statement.block).each do |stmt|
        if TkELSE === stmt.tokens.first
          push_state(:visibility => visibility) do
            parser.process(stmtlist.new(stmt.block))
          end
        end
      end
    end

parse_then_block() click to toggle source

@since 0.5.5

    # File lib/yard/handlers/ruby/legacy/class_condition_handler.rb, line 67
    def parse_then_block
      parse_block(:visibility => visibility)
    end

[Validate]

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