Sha256: d5a713c066b28c8fbe70f40b73a674832653848fc023c526cbce315597d547eb
Contents?: true
Size: 1014 Bytes
Versions: 350
Compression:
Stored size: 1014 Bytes
Contents
module Treetop
module Compiler
class Predicate < ParsingExpression
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
def assign_failure
super(start_index_var)
end
def assign_success
reset_index
assign_result epsilon_node
end
end
class AndPredicate < Predicate
def when_success
assign_success
end
def when_failure
assign_failure
end
end
class NotPredicate < Predicate
def when_success
assign_failure
end
def when_failure
assign_success
end
end
end
end
Version data entries
350 entries across 305 versions & 42 rubygems