| author | bulwahn |
| Wed, 19 Oct 2011 09:11:20 +0200 | |
| changeset 45190 | 58e33a125f32 |
| parent 43779 | 47bec02c6762 |
| child 68265 | f0899dad4877 |
| permissions | -rw-r--r-- |
| 43730 | 1 |
/* Title: Pure/term.scala |
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Author: Makarius |
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Lambda terms, types, sorts. |
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Note: Isabelle/ML is the primary environment for logical operations. |
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*/ |
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package isabelle |
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object Term |
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{
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type Indexname = (String, Int) |
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type Sort = List[String] |
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val dummyS: Sort = List("")
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sealed abstract class Typ |
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case class Type(name: String, args: List[Typ] = Nil) extends Typ |
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case class TFree(name: String, sort: Sort = dummyS) extends Typ |
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case class TVar(name: Indexname, sort: Sort = dummyS) extends Typ |
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val dummyT = Type("dummy")
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sealed abstract class Term |
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case class Const(name: String, typ: Typ = dummyT) extends Term |
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case class Free(name: String, typ: Typ = dummyT) extends Term |
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case class Var(name: Indexname, typ: Typ = dummyT) extends Term |
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case class Bound(index: Int) extends Term |
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case class Abs(name: String, typ: Typ = dummyT, body: Term) extends Term |
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case class App(fun: Term, arg: Term) extends Term |
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43731
70072780e095
inner syntax supports inlined YXML according to Term_XML (particularly useful for producing text under program control);
wenzelm
parents:
43730
diff
changeset
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} |
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70072780e095
inner syntax supports inlined YXML according to Term_XML (particularly useful for producing text under program control);
wenzelm
parents:
43730
diff
changeset
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