CODEWITHSUNDEEP
c++reference
Phil
Phil

Reputation: 758

compiler adding references operator

I try to call a class function from another class an I get something absolutely weird

all parameters are treated as references , and i cant see why the compiler threat this as a special case

class AbstractModulation 
{
public: 

    virtual bool isValidMatch(
            FOLTerm* toMatch,
            std::set<FOLVariable>* toMatchVariables, 
            FOLTerm* possibleMatch,
            unordered_map<FOLVariable, FOLTerm*>* substitution)=0;
...

this line:

abstractModulation->isValidMatch(toMatch, toMatchVariables,(FOLTerm*) variable,substitution)

causes this error (see the & character added to each parameter..wtf?):

AbstractModulation.cpp:105:104: error: no matching function for call to ‘AbstractModulation::isValidMatch(FOLTerm*&, std::vector<FOLVariable>*&, FOLTerm*, std::unordered_map<FOLVariable, FOLTerm*>*&)’

candidate:

AbstractModulation.h:44:7: note: bool AbstractModulation::isValidMatch(FOLTerm*, std::set<FOLVariable>*, FOLTerm*, std::unordered_map<FOLVariable, FOLTerm*>*)

and here are the objjects pointers from the calling class

class IdentifyCandidateMatchingTerm : public FOLVisitor 
{
private:
    FOLTerm* toMatch;
    vector<FOLVariable>* toMatchVariables;
    FOLTerm* matchingTerm;
    unordered_map<FOLVariable, FOLTerm*>* substitution;

please help me out, this is really weird...

Upvotes: 0

Views: 48

Answers (1)

4pie0
4pie0

Reputation: 29724

You have defined your function taking std::set<FOLVariable>* variable but you try to call it with std::vector<FOLVariable>*.

error: no matching function for call to 
        ‘AbstractModulation::isValidMatch(FOLTerm*&, std::vector<FOLVariable>*&,
                                                     ^^^^^^^^^^^

But definition is

virtual bool isValidMatch( FOLTerm* toMatch, std::set<FOLVariable>*
                                             ^^^^^^^^

This clearly explains what is going on. Double check how and where you are calling this method.

Upvotes: 3

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