author | wenzelm |
Thu, 05 Jan 2012 14:34:18 +0100 | |
changeset 46122 | 1e9ec1a44dfc |
parent 45666 | d83797ef0d2d |
child 46737 | 09ab89658a5d |
permissions | -rw-r--r-- |
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/* Title: Pure/Thy/thy_info.scala |
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Author: Makarius |
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Theory and file dependencies. |
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*/ |
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package isabelle |
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class Thy_Info(thy_load: Thy_Load) |
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{ |
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/* messages */ |
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private def show_path(names: List[Document.Node.Name]): String = |
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names.map(name => quote(name.theory)).mkString(" via ") |
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private def cycle_msg(names: List[Document.Node.Name]): String = |
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"Cyclic dependency of " + show_path(names) |
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private def required_by(initiators: List[Document.Node.Name]): String = |
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if (initiators.isEmpty) "" |
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else "\n(required by " + show_path(initiators.reverse) + ")" |
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/* dependencies */ |
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def import_name(dir: String, str: String): Document.Node.Name = |
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{ |
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val path = Path.explode(str) |
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val node = thy_load.append(dir, Thy_Header.thy_path(path)) |
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val dir1 = thy_load.append(dir, path.dir) |
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val theory = path.base.implode |
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Document.Node.Name(node, dir1, theory) |
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} |
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type Dep = (Document.Node.Name, Document.Node_Header) |
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private type Required = (List[Dep], Set[Document.Node.Name]) |
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private def require_thys(initiators: List[Document.Node.Name], |
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required: Required, names: List[Document.Node.Name]): Required = |
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(required /: names)(require_thy(initiators, _, _)) |
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private def require_thy(initiators: List[Document.Node.Name], |
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required: Required, name: Document.Node.Name): Required = |
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{ |
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val (deps, seen) = required |
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if (seen(name)) required |
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else if (thy_load.is_loaded(name.theory)) (deps, seen + name) |
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parents:
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else { |
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try { |
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if (initiators.contains(name)) error(cycle_msg(initiators)) |
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val header = |
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try { thy_load.check_thy(name) } |
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catch { |
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case ERROR(msg) => |
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cat_error(msg, "The error(s) above occurred while examining theory " + |
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quote(name.theory) + required_by(initiators)) |
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} |
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val imports = header.imports.map(import_name(name.dir, _)) |
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val (deps1, seen1) = require_thys(name :: initiators, (deps, seen + name), imports) |
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((name, Exn.Res(header)) :: deps1, seen1) |
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wenzelm
parents:
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} |
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catch { case e: Throwable => (((name, Exn.Exn(e)): Dep) :: deps, seen + name) } |
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} |
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} |
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parents:
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def dependencies(names: List[Document.Node.Name]): List[Dep] = |
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require_thys(Nil, (Nil, Set.empty), names)._1.reverse |
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} |