author | wenzelm |
Tue, 07 Aug 2012 20:28:35 +0200 | |
changeset 48713 | de26cf3191a3 |
parent 48693 | ceeea46bdeba |
child 48718 | 73e6c22e2d94 |
permissions | -rw-r--r-- |
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/* Title: Pure/System/options.scala |
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Author: Makarius |
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Stand-alone options with external string representation. |
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*/ |
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package isabelle |
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object Options |
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{ |
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type Spec = (String, Option[String]) |
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val empty: Options = new Options() |
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/* representation */ |
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sealed abstract class Type |
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{ |
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def print: String = toString.toLowerCase |
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} |
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private case object Bool extends Type |
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private case object Int extends Type |
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private case object Real extends Type |
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private case object String extends Type |
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case class Opt(typ: Type, value: String, description: String) |
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/* parsing */ |
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private val DECLARE = "declare" |
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private val DEFINE = "define" |
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lazy val options_syntax = Outer_Syntax.init() + ":" + "=" + "--" + DECLARE + DEFINE |
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private object Parser extends Parse.Parser |
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{ |
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val entry: Parser[Options => Options] = |
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{ |
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val option_name = atom("option name", _.is_xname) |
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val option_type = atom("option type", _.is_ident) |
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val option_value = |
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opt(token("-", tok => tok.is_sym_ident && tok.content == "-")) ~ atom("nat", _.is_nat) ^^ |
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{ case s ~ n => if (s.isDefined) "-" + n else n } | |
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atom("option value", tok => tok.is_name || tok.is_float) |
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keyword(DECLARE) ~! (option_name ~ keyword(":") ~ option_type ~ |
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keyword("=") ~ option_value ~ (keyword("--") ~! text ^^ { case _ ~ x => x } | success(""))) ^^ |
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{ case _ ~ (a ~ _ ~ b ~ _ ~ c ~ d) => (options: Options) => options.declare(a, b, c, d) } | |
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keyword(DEFINE) ~! (option_name ~ keyword("=") ~ option_value) ^^ |
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{ case _ ~ (a ~ _ ~ b) => (options: Options) => options.define(a, b) } |
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} |
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def parse_entries(file: Path): List[Options => Options] = |
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{ |
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val toks = options_syntax.scan(File.read(file)) |
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parse_all(rep(entry), Token.reader(toks, file.implode)) match { |
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case Success(result, _) => result |
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case bad => error(bad.toString) |
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} |
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} |
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} |
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private val OPTIONS = Path.explode("etc/options") |
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def init(): Options = |
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{ |
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var options = empty |
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for { |
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dir <- Isabelle_System.components() |
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file = dir + OPTIONS if file.is_file |
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entry <- Parser.parse_entries(file) |
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} { |
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try { options = entry(options) } |
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catch { case ERROR(msg) => error(msg + Position.str_of(file.position)) } |
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} |
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options |
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} |
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/* encode */ |
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val encode: XML.Encode.T[Options] = (options => options.encode) |
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/* command line entry point */ |
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"isabelle options" prints Isabelle system options;
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def main(args: Array[String]) |
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{ |
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Command_Line.tool { |
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args.toList match { |
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case export_file :: more_options => |
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val options = (Options.init() /: more_options)(_.define_simple(_)) |
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if (export_file == "") java.lang.System.out.println(options.print) |
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else File.write(Path.explode(export_file), YXML.string_of_body(options.encode)) |
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0 |
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case _ => error("Bad arguments:\n" + cat_lines(args)) |
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} |
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} |
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} |
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} |
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final class Options private(options: Map[String, Options.Opt] = Map.empty) |
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{ |
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override def toString: String = options.iterator.mkString("Options (", ",", ")") |
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def print: String = |
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cat_lines(options.toList.sortBy(_._1).map({ case (name, opt) => |
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name + " : " + opt.typ.print + " = " + |
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(if (opt.typ == Options.String) quote(opt.value) else opt.value) + |
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"\n -- " + quote(opt.description) })) |
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/* check */ |
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private def check_name(name: String): Options.Opt = |
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options.get(name) match { |
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case Some(opt) => opt |
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case None => error("Unknown option " + quote(name)) |
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} |
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private def check_type(name: String, typ: Options.Type): Options.Opt = |
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{ |
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val opt = check_name(name) |
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if (opt.typ == typ) opt |
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else error("Ill-typed option " + quote(name) + " : " + opt.typ.print + " vs. " + typ.print) |
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} |
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/* basic operations */ |
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private def put[A](name: String, typ: Options.Type, value: String): Options = |
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{ |
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val opt = check_type(name, typ) |
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new Options(options + (name -> opt.copy(value = value))) |
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} |
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private def get[A](name: String, typ: Options.Type, parse: String => Option[A]): A = |
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{ |
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val opt = check_type(name, typ) |
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parse(opt.value) match { |
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case Some(x) => x |
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case None => |
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error("Malformed value for option " + quote(name) + |
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" : " + typ.print + " =\n" + quote(opt.value)) |
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} |
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} |
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/* internal lookup and update */ |
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val bool = new Object |
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{ |
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def apply(name: String): Boolean = get(name, Options.Bool, Properties.Value.Boolean.unapply) |
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def update(name: String, x: Boolean): Options = |
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put(name, Options.Bool, Properties.Value.Boolean(x)) |
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} |
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val int = new Object |
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{ |
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def apply(name: String): Int = get(name, Options.Int, Properties.Value.Int.unapply) |
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def update(name: String, x: Int): Options = |
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put(name, Options.Int, Properties.Value.Int(x)) |
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} |
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|
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val real = new Object |
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{ |
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def apply(name: String): Double = get(name, Options.Real, Properties.Value.Double.unapply) |
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def update(name: String, x: Double): Options = |
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put(name, Options.Real, Properties.Value.Double(x)) |
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} |
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|
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val string = new Object |
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{ |
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def apply(name: String): String = get(name, Options.String, s => Some(s)) |
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def update(name: String, x: String): Options = put(name, Options.String, x) |
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} |
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|
185 |
||
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/* external declare and define */ |
|
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||
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private def check_value(name: String): Options = |
|
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{ |
|
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val opt = check_name(name) |
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opt.typ match { |
|
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case Options.Bool => bool(name); this |
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case Options.Int => int(name); this |
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case Options.Real => real(name); this |
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case Options.String => string(name); this |
|
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} |
|
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} |
|
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||
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def declare(name: String, typ_name: String, value: String, description: String = ""): Options = |
|
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{ |
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options.get(name) match { |
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case Some(_) => error("Duplicate declaration of option " + quote(name)) |
|
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case None => |
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val typ = |
|
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typ_name match { |
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case "bool" => Options.Bool |
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case "int" => Options.Int |
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case "real" => Options.Real |
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case "string" => Options.String |
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case _ => error("Unknown type for option " + quote(name) + " : " + quote(typ_name)) |
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} |
212 |
(new Options(options + (name -> Options.Opt(typ, value, description)))).check_value(name) |
|
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} |
|
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} |
|
215 |
||
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def define(name: String, value: String): Options = |
|
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{ |
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val opt = check_name(name) |
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(new Options(options + (name -> opt.copy(value = value)))).check_value(name) |
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} |
|
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||
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def define(name: String, opt_value: Option[String]): Options = |
|
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{ |
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val opt = check_name(name) |
|
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opt_value match { |
|
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case Some(value) => define(name, value) |
|
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case None if opt.typ == Options.Bool => define(name, "true") |
|
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case None => error("Missing value for option " + quote(name) + " : " + opt.typ.print) |
|
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} |
|
230 |
} |
|
231 |
||
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def ++ (specs: List[Options.Spec]): Options = |
233 |
(this /: specs)({ case (x, (y, z)) => x.define(y, z) }) |
|
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||
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def define_simple(str: String): Options = |
236 |
{ |
|
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str.indexOf('=') match { |
|
238 |
case -1 => define(str, None) |
|
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case i => define(str.substring(0, i), str.substring(i + 1)) |
|
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} |
|
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} |
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|
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243 |
|
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/* encode */ |
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def encode: XML.Body = |
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{ |
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import XML.Encode.{string => str, _} |
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list(triple(str, str, str))( |
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options.toList.map({ case (name, opt) => (name, opt.typ.print, opt.value) })) |
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} |
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} |