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allow (but ignore) unary $distinct #832

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Merged
MichaelRawson merged 1 commit into from
Mar 26, 2026
Merged

allow (but ignore) unary $distinct #832

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6 changes: 5 additions & 1 deletion Parse/TPTP.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3204,8 +3204,12 @@ Formula* TPTP::createPredicateApplication(std::string name, unsigned arity)
}
if (pred == -2){ // distinct
// TODO check that we are top-level

// ignore pointless $distinct(x)
if(arity < 2)
return new Formula(true);
// If fewer than 5 things are distinct then we add the disequalities
if(arity<5){
else if(arity < 5){
static Stack<unsigned> distincts;
distincts.reset();
for(int i=arity-1;i >= 0; i--){
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