--- a/src/Pure/Isar/token.scala Fri Jul 20 12:45:12 2012 +0200
+++ b/src/Pure/Isar/token.scala Fri Jul 20 15:48:22 2012 +0200
@@ -73,8 +73,10 @@
kind == Token.Kind.ALT_STRING ||
kind == Token.Kind.VERBATIM ||
kind == Token.Kind.COMMENT
+ def is_ident: Boolean = kind == Token.Kind.IDENT
def is_string: Boolean = kind == Token.Kind.STRING
def is_nat: Boolean = kind == Token.Kind.NAT
+ def is_float: Boolean = kind == Token.Kind.FLOAT
def is_name: Boolean =
kind == Token.Kind.IDENT ||
kind == Token.Kind.SYM_IDENT ||
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/System/options.scala Fri Jul 20 15:48:22 2012 +0200
@@ -0,0 +1,183 @@
+/* Title: Pure/System/options.scala
+ Author: Makarius
+
+Stand-alone options with external string representation.
+*/
+
+package isabelle
+
+
+import java.io.File
+
+
+object Options
+{
+ abstract class Type
+ {
+ def print: String = toString.toLowerCase
+ def init: String
+ }
+ case object Bool extends Type { def init = "false" }
+ case object Int extends Type { def init = "0" }
+ case object Real extends Type { def init = "0.0" }
+ case object String extends Type { def init = "" }
+
+ case class Opt(typ: Type, description: String, value: String)
+
+ val empty: Options = new Options()
+
+
+ /* parsing */
+
+ private object Parser extends Parse.Parser
+ {
+ val DECLARE = "declare"
+ val DEFINE = "define"
+
+ val syntax = Outer_Syntax.empty + ":" + "=" + DECLARE + DEFINE
+
+ val entry: Parser[Options => Options] =
+ {
+ val option_name = atom("option name", _.is_xname)
+ val option_type = atom("option type", _.is_ident)
+ val option_value = atom("option value", tok => tok.is_name || tok.is_float)
+
+ keyword(DECLARE) ~! (option_name ~ keyword(":") ~ option_type ~ opt(text)) ^^
+ { case _ ~ (x ~ _ ~ y ~ z) => (options: Options) =>
+ options.declare(x, y, z.getOrElse("")) } |
+ keyword(DEFINE) ~! (option_name ~ keyword("=") ~ option_value) ^^
+ { case _ ~ (x ~ _ ~ y) => (options: Options) =>
+ options.define(x, y) }
+ }
+
+ def parse_entries(file: File): List[Options => Options] =
+ {
+ val toks = syntax.scan(Standard_System.read_file(file))
+ parse_all(rep(entry), Token.reader(toks, file.toString)) match {
+ case Success(result, _) => result
+ case bad => error(bad.toString)
+ }
+ }
+ }
+
+ val OPTIONS = Path.explode("etc/options")
+
+ def init(): Options =
+ {
+ var options = empty
+ for {
+ dir <- Isabelle_System.components()
+ file = Isabelle_System.platform_file(dir + OPTIONS)
+ if file.isFile
+ entry <- Parser.parse_entries(file)
+ } {
+ try { options = entry(options) }
+ catch { case ERROR(msg) => error(msg + " (file " + quote(file.toString) + ")") }
+ }
+ options
+ }
+}
+
+
+final class Options private(options: Map[String, Options.Opt] = Map.empty)
+{
+ override def toString: String = options.iterator.mkString("Options (", ",", ")")
+
+
+ /* basic operations */
+
+ private def check_name(name: String): Options.Opt =
+ options.get(name) match {
+ case Some(opt) => opt
+ case None => error("Undeclared option " + quote(name))
+ }
+
+ private def check_type(name: String, typ: Options.Type): Options.Opt =
+ {
+ val opt = check_name(name)
+ if (opt.typ == typ) opt
+ else error("Ill-typed option " + quote(name) + " : " + opt.typ.print + " vs. " + typ.print)
+ }
+
+ private def get[A](name: String, typ: Options.Type, parse: String => Option[A]): A =
+ {
+ val opt = check_type(name, typ)
+ parse(opt.value) match {
+ case Some(x) => x
+ case None =>
+ error("Malformed value for option " + quote(name) +
+ " : " + typ.print + " =\n" + quote(opt.value))
+ }
+ }
+
+ private def put[A](name: String, typ: Options.Type, value: String): Options =
+ {
+ val opt = check_type(name, typ)
+ new Options(options + (name -> opt.copy(value = value)))
+ }
+
+
+
+
+ /* external declare and define */
+
+ def declare(name: String, typ_name: String, description: String = ""): Options =
+ {
+ options.get(name) match {
+ case Some(_) => error("Duplicate declaration of option " + quote(name))
+ case None =>
+ val typ =
+ typ_name match {
+ case "bool" => Options.Bool
+ case "int" => Options.Int
+ case "real" => Options.Real
+ case "string" => Options.String
+ case _ => error("Malformed type for option " + quote(name) + " : " + quote(typ_name))
+ }
+ new Options(options + (name -> Options.Opt(typ, description, typ.init)))
+ }
+ }
+
+ def define(name: String, value: String): Options =
+ {
+ val opt = check_name(name)
+ val result = new Options(options + (name -> opt.copy(value = value)))
+ opt.typ match {
+ case Options.Bool => result.bool(name); ()
+ case Options.Int => result.int(name); ()
+ case Options.Real => result.real(name); ()
+ case Options.String => result.string(name); ()
+ }
+ result
+ }
+
+
+ /* internal lookup and update */
+
+ val bool = new Object
+ {
+ def apply(name: String): Boolean = get(name, Options.Bool, Properties.Value.Boolean.unapply)
+ def update(name: String, x: Boolean): Options =
+ put(name, Options.Bool, Properties.Value.Boolean(x))
+ }
+
+ val int = new Object
+ {
+ def apply(name: String): Int = get(name, Options.Int, Properties.Value.Int.unapply)
+ def update(name: String, x: Int): Options =
+ put(name, Options.Int, Properties.Value.Int(x))
+ }
+
+ val real = new Object
+ {
+ def apply(name: String): Double = get(name, Options.Real, Properties.Value.Double.unapply)
+ def update(name: String, x: Double): Options =
+ put(name, Options.Real, Properties.Value.Double(x))
+ }
+
+ val string = new Object
+ {
+ def apply(name: String): String = get(name, Options.String, s => Some(s))
+ def update(name: String, x: String): Options = put(name, Options.String, x)
+ }
+}
--- a/src/Pure/build-jars Fri Jul 20 12:45:12 2012 +0200
+++ b/src/Pure/build-jars Fri Jul 20 15:48:22 2012 +0200
@@ -48,6 +48,7 @@
System/isabelle_process.scala
System/isabelle_system.scala
System/main.scala
+ System/options.scala
System/platform.scala
System/session.scala
System/session_manager.scala