Class: AtCoderFriends::RubyGenerator

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

Overview

generates C++ source code from definition

Constant Summary collapse

TEMPLATE = 
"### DCLS ###\n\nputs ans\n"

Instance Method Summary collapse

Instance Method Details

#gen_decl(inpdef) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 26

def gen_decl(inpdef)
  case inpdef.container
  when :single
    gen_single_decl(inpdef)
  when :harray
    gen_harray_decl(inpdef)
  when :varray
    if inpdef.names.size == 1
      gen_varray_1_decl(inpdef)
    else
      gen_varray_n_decl(inpdef)
    end
  when :matrix
    gen_matrix_decl(inpdef)
  end
end

#gen_decls(defs) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 22

def gen_decls(defs)
  defs.map { |inpdef| gen_decl(inpdef) }.flatten
end

#gen_expr(item, split) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 86

def gen_expr(item, split)
  case item
  when :number
    split ? 'gets.split.map(&:to_i)' : 'gets.to_i'
  when :string
    split ? 'gets.chomp.split' : 'gets.chomp'
  when :char
    'gets.chomp'
  end
end

#gen_harray_decl(inpdef) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 50

def gen_harray_decl(inpdef)
  v = inpdef.names[0]
  dcl = "#{v}s"
  expr = gen_expr(inpdef.item, true)
  "#{dcl} = #{expr}"
end

#gen_matrix_decl(inpdef) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 78

def gen_matrix_decl(inpdef)
  v = inpdef.names[0]
  sz = inpdef.size[0]
  decl = "#{v}ss"
  expr = gen_expr(inpdef.item, true)
  "#{decl} = Array.new(#{sz}) { #{expr} }"
end

#gen_single_decl(inpdef) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 43

def gen_single_decl(inpdef)
  names = inpdef.names
  dcl = names.join(', ')
  expr = gen_expr(inpdef.item, names.size > 1)
  "#{dcl} = #{expr}"
end

#gen_varray_1_decl(inpdef) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 57

def gen_varray_1_decl(inpdef)
  v = inpdef.names[0]
  sz = inpdef.size[0]
  dcl = "#{v}s"
  expr = gen_expr(inpdef.item, false)
  "#{dcl} = Array.new(#{sz}) { #{expr} }"
end

#gen_varray_n_decl(inpdef) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 65

def gen_varray_n_decl(inpdef)
  names = inpdef.names
  sz = inpdef.size[0]
  dcl = names.map { |v| "#{v}s[i]" }.join(', ')
  expr = gen_expr(inpdef.item, true)
  ret = []
  ret += names.map { |v| "#{v}s = Array.new(#{sz})" }
  ret << "#{sz}.times do |i|"
  ret << "  #{dcl} = #{expr}"
  ret << 'end'
  ret
end

#generate(defs) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 17

def generate(defs)
  dcls = gen_decls(defs).join("\n")
  TEMPLATE.sub('### DCLS ###', dcls)
end

#process(pbm) ⇒ Object 



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# File 'lib/at_coder_friends/ruby_generator.rb', line 12

def process(pbm)
  src = generate(pbm.defs)
  pbm.add_src(:rb, src)
end