Module: Trxl::CaseExpression1

Defined in:
lib/trxl/trxl_grammar.rb

Instance Method Summary collapse

Instance Method Details

#eval(env = Environment.new) ⇒ Object 



1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
 
# File 'lib/trxl/trxl_grammar.rb', line 1141

def eval(env = Environment.new)
  case_val = case_exp.eval(env)
  else_val = else_exp.eval(env)

  Kernel.eval "    case case_val\n      \#{ruby_when_expressions(env)}\n      else \#{else_val.is_a?(String) ? \"'\#{else_val}'\" : else_val}\n    end\n  CASE\nend\n"

#ruby_when_expressions(env = Environment.new) ⇒ Object 



1153
1154
1155
1156
1157
1158
 
# File 'lib/trxl/trxl_grammar.rb', line 1153

def ruby_when_expressions(env = Environment.new)
  when_expression_list.eval(env).inject('') do |ruby, e|
    # possible string values have been wrapped in '' already
    ruby << "when #{e[:condition]} then #{e[:expression]} "
  end
end