/* Title: Pure/Thy/thy_load.scala
Author: Makarius
Primitives for loading theory files.
*/
package isabelle
import java.io.File
class Thy_Load
{
/* loaded theories provided by prover */
private var loaded_theories: Set[String] = Set()
def register_thy(thy_name: String): Unit =
synchronized { loaded_theories += thy_name }
def is_loaded(thy_name: String): Boolean =
synchronized { loaded_theories.contains(thy_name) }
/* file-system operations */
def append(dir: String, source_path: Path): String =
(Path.explode(dir) + source_path).implode
def check_thy(name: Document.Node.Name): Thy_Header =
{
val file = new File(name.node)
if (!file.exists || !file.isFile) error("No such file: " + quote(file.toString))
Thy_Header.read(file)
}
}