INTERFACE M3CTypeCheck;
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Copyright (C) Olivetti 1989
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upon this software are permitted to any person, provided this same
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included in any copy of the software or any modification thereof or
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This software is made available AS IS and Olivetti disclaims all
warranties with respect to this software, whether expressed or implied
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of this software.
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IMPORT AST, M3AST_AS, ASTWalk;
TYPE
Handle <: REFANY;
PROCEDURE Node(
handle: Handle;
any: AST.NODE;
v: ASTWalk.VisitMode)
RAISES {};
Type check the given node. This routine is intended for use by the tree
walker. It assumes that all type specs and expression values (if constant)
have been set. 'handle' contains information needed in order to do type
checking - see 'NewHandle' below
PROCEDURE NewHandle(safe: BOOLEAN; in: M3AST_AS.Proc_decl): Handle RAISES {};
Before the tree walk starts some information is required:
'safe' is the tree walk occuring in a safe module?
'in' is the tree walk starting inside a procedure body? If so 'in' should
be the declaration for the procedure, otherwise it should be NIL.
This knowledge is required for RETURN expression checking.
END M3CTypeCheck.