Class: Treetop::Compiler::Repetition

Inherits:
ParsingExpression show all
Defined in:
lib/treetop/compiler/node_classes/repetition.rb

Direct Known Subclasses

OccurrenceRange, OneOrMore, ZeroOrMore

Instance Attribute Summary

Attributes inherited from ParsingExpression

#address, #builder, #parent_expression, #subexpression_address, #var_symbols

Attributes inherited from Runtime::SyntaxNode

#input, #interval, #parent

Instance Method Summary collapse

Methods inherited from ParsingExpression

#accumulate_subexpression_result, #accumulator_var, #assign_failure, #assign_lazily_instantiated_node, #assign_result, #begin_comment, #declared_module_name, #decorated?, #end_comment, #epsilon_node, #extend_result, #extend_result_with_declared_module, #extend_result_with_inline_module, #init_value, #node_class_name, #obtain_new_subexpression_address, #on_one_line, #optional_arg, #reset_index, #result_var, #start_index_var, #subexpression_result_var, #subexpression_success?, #use_vars, #var, #var_initialization

Methods inherited from Runtime::SyntaxNode

#<=>, #dot_id, #elements, #empty?, #extension_modules, #initialize, #inspect, #nonterminal?, #terminal?, #text_value, #write_dot, #write_dot_file

Constructor Details

This class inherits a constructor from Treetop::Runtime::SyntaxNode

Instance Method Details

#assign_and_extend_result ⇒ Object 



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# File 'lib/treetop/compiler/node_classes/repetition.rb', line 31

def assign_and_extend_result
  assign_result "instantiate_node(#{node_class_name},input, #{start_index_var}...index, #{accumulator_var})"
  extend_result_with_inline_module
end

#compile(address, builder, parent_expression) ⇒ Object 



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# File 'lib/treetop/compiler/node_classes/repetition.rb', line 4

def compile(address, builder, parent_expression)
  super
  repeated_expression = parent_expression.atomic
  begin_comment(parent_expression)
  use_vars :result, :accumulator, :start_index

  builder.loop do
    obtain_new_subexpression_address
    repeated_expression.compile(subexpression_address, builder)
    builder.if__ subexpression_success? do
      accumulate_subexpression_result
    end
    builder.else_ do
      builder.break
    end
    if max && !max.empty?
      builder.if_ "#{accumulator_var}.size == #{max.text_value}" do
        builder.break
      end
    end
  end
end

#inline_module_name ⇒ Object 



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# File 'lib/treetop/compiler/node_classes/repetition.rb', line 27

def inline_module_name
  parent_expression.inline_module_name
end