##
# Describes the environment a block was created in. BlockEnvironment is used
# to create a BlockContext.
module Rubinius
class BlockEnvironment
attr_accessor :local_count
attr_accessor :method # The CompiledMethod object that we were called from
attr_accessor :initial_ip
attr_accessor :last_ip
attr_accessor :post_send
attr_accessor :scope
attr_accessor :top_scope
attr_accessor :proc_environment
attr_accessor :metadata_container
def from_proc?
@proc_environment
end
def under_context(scope, cmethod)
@top_scope = scope
@scope = scope
@method = cmethod
@local_count = cmethod.local_count
return self
end
def receiver=(obj)
@top_scope.self = obj
end
##
# First field of the tuple in @metadata_container holds a boolean
# indicating if the context is from eval
def from_eval?
@metadata_container and @metadata_container[0]
end
def from_eval!
@metadata_container = Tuple.new(1) unless @metadata_container
@metadata_container[0] = true
end
def make_independent
@top_scope = @top_scope.dup
@scope = @scope.dup
end
def call_on_instance(obj, *args)
call_under obj, method.scope, *args
end
def arity
method.required_args
end
def disable_long_return!
@post_send = nil
end
# TODO: are file,line actually used?
def file
method.file
end
def line
method.line_from_ip(0)
end
end
end
