Class: Debugger::ExpressionInfoCommand

Inherits:
Command
  • Object
show all
Defined in:
lib/ruby-debug-ide/commands/expression_info.rb

Constant Summary

Constants inherited from Command

Command::DEF_OPTIONS

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Command

commands, #find, inherited, #initialize, load_commands, #match, method_missing, options

Constructor Details

This class inherits a constructor from Debugger::Command

Class Method Details

.help(cmd) ⇒ Object 



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# File 'lib/ruby-debug-ide/commands/expression_info.rb', line 54

def help(cmd)
  %{
    ex[pression_info] <expression>\t
    returns parser-related information for the expression given\t\t
    'incomplete'=true|false\tindicates whether expression is a complete ruby
    expression and can be evaluated without getting syntax errors
  }
end

.help_command ⇒ Object 



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# File 'lib/ruby-debug-ide/commands/expression_info.rb', line 50

def help_command
  "expression_info"
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/ruby-debug-ide/commands/expression_info.rb', line 11

def execute
  string_to_parse = @match.post_match.gsub("\\n", "\n") + "\n\n\n"
  total_lines = string_to_parse.count("\n") + 1

  lexer = RubyLex.new
  io = StringIO.new(string_to_parse)
  # for passing to the lexer
  io.instance_exec(string_to_parse.encoding) do |string_encoding|
    @my_encoding = string_encoding
    def self.encoding
      @my_encoding
    end
  end

  lexer.set_input(io)

  last_statement = ''
  last_prompt = ''
  last_indent = 0
  lexer.set_prompt do |ltype, indent, continue, lineno|
    next if (lineno >= total_lines)

    last_prompt = ltype || ''
    last_indent = indent
  end

  lexer.each_top_level_statement do |line, line_no|
    last_statement = line
  end

  incomplete = true
  if /\A\s*\Z/m =~ last_statement[0]
    incomplete = false
  end

  @printer.print_expression_info(incomplete, last_prompt, last_indent)
end

#regexp ⇒ Object 



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# File 'lib/ruby-debug-ide/commands/expression_info.rb', line 7

def regexp
  /^\s*ex(?:pression_info)?\s+/
end