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Copyright (C) Olivetti 1989
All Rights reserved
Use and copy of this software and preparation of derivative works based
upon this software are permitted to any person, provided this same
copyright notice and the following Olivetti warranty disclaimer are
included in any copy of the software or any modification thereof or
derivative work therefrom made by any person.
This software is made available AS IS and Olivetti disclaims all
warranties with respect to this software, whether expressed or implied
under any law, including all implied warranties of merchantibility and
fitness for any purpose. In no event shall Olivetti be liable for any
damages whatsoever resulting from loss of use, data or profits or
otherwise arising out of or in connection with the use or performance
of this software.
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Copyright (C) 1993, Digital Equipment Corporation
All rights reserved.
See the file COPYRIGHT for a full description.
INTERFACE M3ASTDisplay;
IMPORT Wr, M3AST, ASTWalk;
Specialized walk of the tree which pretty prints.
TYPE
Closure <: ASTWalk.Closure; (* may be subtyped by client to hold state. *)
PROCEDURE Nodes(
n: M3AST.NODE;
s: Wr.T)
RAISES {Wr.Failure};
The default walk never calls back.
PROCEDURE ModeNodes(
n: M3AST.NODE;
c: Closure;
vm : ASTWalk.VisitModeControl;
s: Wr.T)
RAISES {Wr.Failure};
This one supplies a callback
PROCEDURE IgnoreChildren(c: Closure) RAISES {};
Can be called from an entry visit to suppress visiting the children
of this node. Once control moves to another node, the suppression
is disabled.
END M3ASTDisplay.