Class: TOML::Parser

Inherits:
Object show all
Defined in:
lib/toml/parser.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(markup) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/toml/parser.rb', line 5

def initialize(markup)
  # Make sure we have a newline on the end
  
  markup += "\n" unless markup.end_with?("\n") || markup.length == 0
  begin
    tree = Parslet.new.parse(markup)
  rescue Parslet::ParseFailed => failure
    puts failure.cause.ascii_tree
  end
  
  
  parts = Transformer.new.apply(tree) || []
  @parsed = {}
  @current = @parsed
  @current_path = ''
  
  parts.each do |part|
    if part.is_a? Key
      # If @current is an array then we're in a key-group
      if @current.is_a? Array
        # Make sure there's a table to work with.
        @current << {} if @current.last.nil?
        # Set the key on the table.
        @current.last[part.key] = part.value
        next
      end
      # Make sure the key isn't already set
      if !@current.is_a?(Hash) || @current.has_key?(part.key)
        err = "Cannot override key '#{part.key}'"
        unless @current_path.empty?
          err += " at path '#{@current_path}'"
        end
        raise err
      end
      # Set the key-value into the current hash
      @current[part.key] = part.value
    elsif part.is_a?(TableArray)
      resolve_table_array(part)
    elsif part.is_a?(Table)
      resolve_table(part)
    else
      raise "Unrecognized part: #{part.inspect}"
    end
  end
end

Instance Attribute Details

#parsed ⇒ Object (readonly)

Returns the value of attribute parsed.



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# File 'lib/toml/parser.rb', line 3

def parsed
  @parsed
end

Instance Method Details

#resolve_table(t) ⇒ Object 



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# File 'lib/toml/parser.rb', line 83

def resolve_table(t)
  @current = @parsed

  path = t.name.dup
  @current_path = path.join('.')
  while k = path.shift
    # If it's a table-array then get the last item.
    @current = @current.last if @current.is_a? Array
    # Create a new table if one doesn't exist.
    @current[k] = {} if !@current.has_key? k
    # Move into the table.
    @current = @current[k]
  end
end

#resolve_table_array(t) ⇒ Object 



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# File 'lib/toml/parser.rb', line 51

def resolve_table_array(t)
  @current = @parsed
  path = t.name.dup
  @current_path = path.join('.')
  while n = path.shift
    # If it's a table-array then get the last item.
    @current = @current.last if @current.is_a? Array
    
    # If it's the last item:
    if path.length == 0
      # If the current table has an item:
      if @current.has_key?(n)
        # And that item is already a table-array:
        if @current[n].is_a? Array
          # Then add an item to that table-array.
          @current[n] << {}
        else
          raise "Cannot override table array '#{t.name.join '.'}'"
        end
      else
        # Create a new table array if nothing exists here.
        @current[n] = []
      end
    elsif @current.has_key? n
      # Don't do anything if we're just moving into tables.
    else
      @current[n] = {}
    end
    @current = @current[n]
  end
end