c++ - How to solve the error: "no matching function for call to ‘bind(<unresolved overloaded function type>" when std::bind is used in a class -

-

usually, std::bind works in boost::math::tools::bisect(). however, when tried use std::bind in class member functions, there error: " no matching function call ‘bind( "

this 1 member function of class:

    double singlecapillarytube::callocationfunctionwithoutangle(const tubegeometry &tg,                                 const fluidproperties &fp, double templocation,                                 double initiallocationvalue, double temptime,                                 const double initialtimepoint) {     auto coefficientb = calcoefficientb(tg, fp);     auto coefficienta = calcoefficienta(tg, fp);     auto coefficientd = calcoefficientd(tg, fp);     auto tempvalue = -coefficientb * (templocation - initiallocationvalue) - \                     1./2. * coefficienta * (pow(templocation, 2.) - \                     pow(initiallocationvalue, 2.)) - coefficientd * \                     (temptime - initialtimepoint);     return tempvalue; }

then function used in other member function of class:

void singlecapillarytube::callocationinterfacebisect() { stepresult = boost::math::tools::bisect(std::bind(callocationfunctionwithangle,\                                             geometry, fluids, _3, initiallocation, \                                             timepoint, initialtime), 0.0, \                                             -geometry.length, tol); }

when file compiled, error occurred. me solve problem? much:)

non-static member functions need instance called on. give that, pass this pointer first argument function. need use full qualified name of function , take address:

std::bind(&singlecapillarytube::callocationfunctionwithangle, this,           geometry, fluids, _3, initiallocation, timepoint, initialtime)

also note using _3 binds third positional argument parameter, in case first , second arguments ignored. want _1 in spot.


Comments

Post a Comment

Popular posts from this blog

python - pip install -U PySide error -

-
does know how avoid following error when running pip install -u pyside per official website instructions here: https://pypi.python.org/pypi/pyside/#installing-pyside-on-a-mac-os-x-system note have done brew install qt successfully. you using pip version 7.0.3, version 7.1.2 available. should consider upgrading via 'pip install --upgrade pip' command. collecting pyside using cached pyside-1.2.4.tar.gz installing collected packages: pyside running setup.py install pyside complete output command /applications/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-build-cpxemt/pyside/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-0r7hri-record/install-record.txt --single-version-externally-managed --compile:
Read more

arrays - C++ error: a brace-enclosed initializer is not allowed here before ‘{’ token -

-
simple question: i'm trying initialize array within c++ class declaration: using namespace std; #include <string> class myclass{ public: string myarray[] = {"a","b","c"}; }; and i'm getting error: error: brace-enclosed initializer not allowed here before ‘{’ token no, without complied c++11 compiler, cannot initialize member array in declaration. have initialize array member in constructor. , don't use open array if know number of elements initialize array.
Read more

cytoscape.js - How to add nodes to Dagre layout with Cytoscape -

-
i trying add nodes dagre graph through cityscape.js. problem nodes not painted. code have: cy.add({ group: "nodes", data: { id:"n0",name:"n0",weight: 75 }, }); $.ajax(url).done(function(jsontree){ var newnodes=[]; for(var i=1;i<6;i++){ //var child = jsontree.result[i]; newnodes.push( { group: "nodes", data: { id: "n"+i, name:"n"+i}}, { group: "edges", data: { id: "e"+i, source: "n0", target: "n"+i } } ); } cy.add(newnodes); any ideas? have used loaded function reload graph not work. not know if have use specific function reload graph. thank in advance. you need add positions new nodes. cytoscape.js docs : it important note positions of newly added nodes must defined when calling cy.add(). nodes can not placed in graph without valid position — otherwise not displayed. yo
Read more