1 /* Title: Pure/System/options.scala
4 Stand-alone options with external string representation.
17 def print: String = toString.toLowerCase
19 case object Bool extends Type
20 case object Int extends Type
21 case object Real extends Type
22 case object String extends Type
24 case class Opt(typ: Type, value: String, description: String)
26 val empty: Options = new Options()
31 private object Parser extends Parse.Parser
33 val DECLARE = "declare"
36 val syntax = Outer_Syntax.empty + ":" + "=" + DECLARE + DEFINE
38 val entry: Parser[Options => Options] =
40 val option_name = atom("option name", _.is_xname)
41 val option_type = atom("option type", _.is_ident)
42 val option_value = atom("option value", tok => tok.is_name || tok.is_float)
44 keyword(DECLARE) ~! (option_name ~ keyword(":") ~ option_type ~
45 keyword("=") ~ option_value ~ opt(text)) ^^
46 { case _ ~ (a ~ _ ~ b ~ _ ~ c ~ d) =>
47 (options: Options) => options.declare(a, b, c, d.getOrElse("")) } |
48 keyword(DEFINE) ~! (option_name ~ keyword("=") ~ option_value) ^^
49 { case _ ~ (a ~ _ ~ b) => (options: Options) => options.define(a, b) }
52 def parse_entries(file: File): List[Options => Options] =
54 val toks = syntax.scan(Standard_System.read_file(file))
55 parse_all(rep(entry), Token.reader(toks, file.toString)) match {
56 case Success(result, _) => result
57 case bad => error(bad.toString)
62 val OPTIONS = Path.explode("etc/options")
68 dir <- Isabelle_System.components()
69 file = Isabelle_System.platform_file(dir + OPTIONS)
71 entry <- Parser.parse_entries(file)
73 try { options = entry(options) }
74 catch { case ERROR(msg) => error(msg + Position.str_of(Position.file(file))) }
81 final class Options private(options: Map[String, Options.Opt] = Map.empty)
83 override def toString: String = options.iterator.mkString("Options (", ",", ")")
88 private def check_name(name: String): Options.Opt =
89 options.get(name) match {
91 case None => error("Unknown option " + quote(name))
94 private def check_type(name: String, typ: Options.Type): Options.Opt =
96 val opt = check_name(name)
97 if (opt.typ == typ) opt
98 else error("Ill-typed option " + quote(name) + " : " + opt.typ.print + " vs. " + typ.print)
102 /* basic operations */
104 private def put[A](name: String, typ: Options.Type, value: String): Options =
106 val opt = check_type(name, typ)
107 new Options(options + (name -> opt.copy(value = value)))
110 private def get[A](name: String, typ: Options.Type, parse: String => Option[A]): A =
112 val opt = check_type(name, typ)
113 parse(opt.value) match {
116 error("Malformed value for option " + quote(name) +
117 " : " + typ.print + " =\n" + quote(opt.value))
122 /* internal lookup and update */
124 val bool = new Object
126 def apply(name: String): Boolean = get(name, Options.Bool, Properties.Value.Boolean.unapply)
127 def update(name: String, x: Boolean): Options =
128 put(name, Options.Bool, Properties.Value.Boolean(x))
133 def apply(name: String): Int = get(name, Options.Int, Properties.Value.Int.unapply)
134 def update(name: String, x: Int): Options =
135 put(name, Options.Int, Properties.Value.Int(x))
138 val real = new Object
140 def apply(name: String): Double = get(name, Options.Real, Properties.Value.Double.unapply)
141 def update(name: String, x: Double): Options =
142 put(name, Options.Real, Properties.Value.Double(x))
145 val string = new Object
147 def apply(name: String): String = get(name, Options.String, s => Some(s))
148 def update(name: String, x: String): Options = put(name, Options.String, x)
152 /* external declare and define */
154 private def check_value(name: String): Options =
156 val opt = check_name(name)
158 case Options.Bool => bool(name); this
159 case Options.Int => int(name); this
160 case Options.Real => real(name); this
161 case Options.String => string(name); this
165 def declare(name: String, typ_name: String, value: String, description: String = ""): Options =
167 options.get(name) match {
168 case Some(_) => error("Duplicate declaration of option " + quote(name))
172 case "bool" => Options.Bool
173 case "int" => Options.Int
174 case "real" => Options.Real
175 case "string" => Options.String
176 case _ => error("Malformed type for option " + quote(name) + " : " + quote(typ_name))
178 (new Options(options + (name -> Options.Opt(typ, value, description)))).check_value(name)
182 def define(name: String, value: String): Options =
184 val opt = check_name(name)
185 (new Options(options + (name -> opt.copy(value = value)))).check_value(name)
188 def define(name: String, opt_value: Option[String]): Options =
190 val opt = check_name(name)
192 case Some(value) => define(name, value)
193 case None if opt.typ == Options.Bool => define(name, "true")
194 case None => error("Missing value for option " + quote(name) + " : " + opt.typ.print)
198 def define_simple(str: String): Options =
200 str.indexOf('=') match {
201 case -1 => define(str, None)
202 case i => define(str.substring(0, i), str.substring(i + 1))