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Treetop::Compiler::Predicate

Public Instance Methods

assign_failure() click to toggle source
# File lib/treetop/compiler/node_classes/predicate.rb, line 15
def assign_failure
  super(start_index_var)
end
assign_success() click to toggle source
# File lib/treetop/compiler/node_classes/predicate.rb, line 19
def assign_success
  reset_index
  assign_result epsilon_node
end
compile(address, builder, parent_expression) click to toggle source
# File lib/treetop/compiler/node_classes/predicate.rb, line 4
def compile(address, builder, parent_expression)
  super
  begin_comment(parent_expression)
  use_vars :result, :start_index
  obtain_new_subexpression_address
  parent_expression.prefixed_expression.compile(subexpression_address, builder)
  builder.if__(subexpression_success?) { when_success }
  builder.else_ { when_failure }
  end_comment(parent_expression)
end

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