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Contents
module Treetop
module Compiler
class Choice < ParsingExpression
def compile(address, builder, parent_expression = nil)
super
begin_comment(self)
use_vars :result, :start_index
compile_alternatives(alternatives)
end_comment(self)
end
def compile_alternatives(alternatives)
obtain_new_subexpression_address
alternatives.first.compile(subexpression_address, builder)
builder.if__ subexpression_success? do
assign_result subexpression_result_var
extend_result_with_declared_module
extend_result_with_inline_module
end
builder.else_ do
if alternatives.size == 1
reset_index
assign_failure start_index_var
else
compile_alternatives(alternatives[1..-1])
end
end
end
end
end
end
Version data entries
349 entries across 304 versions & 42 rubygems