Class: Lrb

Inherits:
Object
  • Object
show all
Defined in:
lib/lrb.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Lrb

Returns a new instance of Lrb.



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# File 'lib/lrb.rb', line 8

def initialize
  @debug = false
  @indent = 0
  @stack = Array.new
  @parser = Bracer.new
  @parser.ruby_keyword_literals = true
end

Instance Attribute Details

#debug ⇒ Object

Returns the value of attribute debug.



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# File 'lib/lrb.rb', line 6

def debug
  @debug
end

#parser ⇒ Object

Returns the value of attribute parser.



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# File 'lib/lrb.rb', line 6

def parser
  @parser
end

Instance Method Details

#eval_file(path) ⇒ Object 



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# File 'lib/lrb.rb', line 20

def eval_file path
  source = File.read path
  puts "[LRB]:".light_yellow
  puts source.light_yellow
      
  e = to_ruby source
  puts e.light_green
  
  puts "\n[evaluated]:".light_yellow
  puts "#{eval e}".blue
end

#parse(source) ⇒ Object 



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# File 'lib/lrb.rb', line 16

def parse source
  @parser.parse_string source 
end

#to_ruby(source) ⇒ Object 



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# File 'lib/lrb.rb', line 32

def to_ruby source
  ast = parse source 
  puts "parsed: #{ast}".green if @debug
  ast = ast.map do |sexp|
    result = transform sexp
    puts result if @debug
    result
  end
  ast.join "\n\n"
end

#transform(sexp) ⇒ Object 



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# File 'lib/lrb.rb', line 43

def transform sexp
  puts line if @debug
  if sexp.class == Array
    fun = sexp.first
    args = wrap_string sexp.drop(1)
    result = ""
    if @debug
      puts "function: #{fun}".yellow
      puts "args: #{args}".yellow
      puts line 
    end
    
    if KEYWORD.include? fun
      result = self.instance_exec *args, &KEYWORD[fun]
    elsif class_method? fun
      puts "[ERROR] dot operator only take 1 arg.".red if args.length > 1
      result = class_method_append fun, args.first
    else
      # function call
      result = compose_function fun, args
    end

    if @debug
      puts result.light_green
      puts line
    end
    indent + result
  else
    puts "#{sexp}".yellow if @debug
    sexp.to_s
  end
end