2004-04-23 11:58:43 +01:00
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#ifndef MGU
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#define MGU
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#include "terms.h"
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#include "termlists.h"
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#include "substitutions.h"
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2004-05-15 17:43:20 +01:00
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//! A special constant do denote failure.
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/**
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* \c NULL already denotes equality, so an extra signal is needed to
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* denote that a unification fails.
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* \todo Find a portable solution for this \c MGUFAIL constant:
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* maybe a pointer to some special constant.
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*/
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2004-04-23 11:58:43 +01:00
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#define MGUFAIL (Termlist) -1
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Termlist termMguTerm (Term t1, Term t2);
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#endif
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