Sha256: 148b3e41159abbba27ebf6128e4616f64db78563b4fc8afc1909ba2cd994271b
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Size: 1.46 KB
Versions: 93
Compression:
Stored size: 1.46 KB
Contents
module Treetop
module Compiler
class Repetition < ParsingExpression
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
end
end
def inline_module_name
parent_expression.inline_module_name
end
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
end
class ZeroOrMore < Repetition
def compile(address, builder, parent_expression)
super
assign_and_extend_result
end_comment(parent_expression)
end
end
class OneOrMore < Repetition
def compile(address, builder, parent_expression)
super
builder.if__ "#{accumulator_var}.empty?" do
reset_index
assign_failure start_index_var
end
builder.else_ do
assign_and_extend_result
end
end_comment(parent_expression)
end
end
end
end
Version data entries
93 entries across 93 versions & 11 rubygems