INTERFACE M3CChkReturn;
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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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IMPORT AST, M3AST_AS;
IMPORT ASTWalk;
TYPE
Handle <: ASTWalk.Closure;
PROCEDURE NewHandle(cu: M3AST_AS.Compilation_Unit): Handle RAISES {};
Create a new handle for use with the 'Node' procedure. Since
it is a subtype of 'ASTWalk.Closure', it can be passed directly to
the tree walker.
PROCEDURE Node(h: Handle; n: AST.NODE; vm: ASTWalk.VisitMode) RAISES {};
This procedure is intended to be called from the tree walker (in
entry and exit mode) so that it is called on every node in a section of AST.
It checks function declarations and ensures that their last statements
contain RETURN or RAISE. It is pointless to call this procedure on nodes
which are in an interface.
END M3CChkReturn.