def parse_string(code)
		code = code.encode(@internal_encoding)
		artifact = StringArtifact.new(code)
		parse_artifact(artifact)
	end
def parse_string(code)
		code = code.encode(@internal_encoding)
		artifact = StringArtifact.new(code)
		parse_artifact(artifact)
	end
Parse the file by producing an artifact corresponding to the string