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/* |
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* Ascend Instance Tree Type Definitions |
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* by Tom Epperly |
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* 8/16/89 |
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* Version: $Revision: 1.6 $ |
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* Version control file: $RCSfile: mergeinst.h,v $ |
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* Date last modified: $Date: 1997/09/08 18:08:06 $ |
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* Last modified by: $Author: ballan $ |
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* |
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* This file is part of the Ascend Language Interpreter. |
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* |
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* Copyright (C) 1990, 1993, 1994 Thomas Guthrie Epperly |
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* |
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* The Ascend Language Interpreter is free software; you can redistribute |
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* it and/or modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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* The Ascend Language Interpreter is distributed in hope that it will be |
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with the program; if not, write to the Free Software Foundation, |
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* Inc., 675 Mass Ave, Cambridge, MA 02139 USA. Check the file named |
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* COPYING. |
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*/ |
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|
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/** @file |
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* Ascend Instance Tree Type Definitions. |
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* <pre> |
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* When #including mergeinst.h, make sure these files are #included first: |
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* #include "utilities/ascConfig.h" |
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* #include "instance_enum.h" |
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* </pre> |
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*/ |
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|
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#ifndef ASC_MERGEINST_H |
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#define ASC_MERGEINST_H |
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|
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/** addtogroup compiler Compiler |
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@{ |
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*/ |
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|
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ASC_DLLSPEC struct Instance *MergeInstances(struct Instance *i1, struct Instance *i2); |
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/**< |
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* <!-- struct Instance *MergeInstances(i1,i2) --> |
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* <!-- struct Instance *i1,*i2; --> |
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* This is the ARE_THE_SAME operator. |
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* The return value is the merged instance or NULL if can't be done. |
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* Instances are merged from the bottom up, checking one step ahead |
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* for type compatibility. |
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* This operator is MOSTLY BROKEN due to the addition of |
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* parameterized types. In particular, MoreRefined needs to be |
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* augmented to check args that are now part of the extended |
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* type definition. |
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* This may add to or change the pending instance list. |
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* If the return is NULL, the state of i1 and i2 in structural |
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* terms is highly questionable. They may be partially merged. |
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* |
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* @bug Merging two vars in a shared relation will mess up all the |
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* other copies of the relation unless all of their corresponding |
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* vars are also merged. Fixed for token relations, but not others. |
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*/ |
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|
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ASC_DLLSPEC void PostMergeCheck(struct Instance *i); |
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/**< |
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* <!-- void PostMergeCheck(i) --> |
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* <!-- struct Instance *i; --> |
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* Sanity check after a MergeInstances() call. |
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* This should be performed after a MergeInstances call or a sequence of |
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* MergeInstances calls. This goes through the merged instance tree and |
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* make sure the ARE_ALIKE cliques are being enforced. |
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*/ |
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|
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|
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ASC_DLLSPEC void MergeCliques(struct Instance *i1, struct Instance *i2); |
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/**< |
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* <!-- void MergeCliques(i1,i2) --> |
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* <!-- struct Instance *i1,*i2; --> |
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* Merge the cliques represented by i1 and i2. This does not enforce |
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* any type consistency between the clicks; it just links them together. |
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* It doesn't matter if i1 and i2 are already in the same clique. |
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*/ |
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|
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/* @} */ |
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|
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#endif /* ASC_MERGEINST_H */ |
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