c语言中lambda的用法,C语言中嵌套的Lambda Capture

我有类似的东西：

// think of Synonym as a set/vector of values

// the purpose of this function is to filter out elements from the 2 synonyms/sets,

// that are not related (similar to SQL inner join) - modifier modifies vars

void Clauses::modifies(Synonym& modifiers, Synonym& modifiedVars, UnaryPredicate isModifies) {

// filter out any modifiers that does not modify (is related to) any of the variables in modifiedVar (left join)

modifiers.removeIf([modifiedVars, &isModifies](int line) -> bool {

return modifiedVars.none([line, &isModifies](int v) -> bool {

return isModifies(line, v);

});

});

// filter out any candidate modifiedVars that is not modified by any modifiers (right join)

modifiedVars.removeIf([modifiers, &isModifies](int varIndex) -> bool {

return modifiers.none([varIndex, &isModifies](int line) -> bool {

return isModifies(line, varIndex);

});

});

// result is an something like an SQL inner join

}

问题是Visual Studio抱怨：

Error 1 error C3480: 'PQL::Clauses::`anonymous-namespace'::::isModifies': a lambda capture variable must be from an enclosing function scope h:dropboxschcs3202spa_cppspapql.cpp 78

Error 2 error C2665: 'PQL::Clauses::`anonymous-namespace'::::' : none of the 2 overloads could convert all the argument types h:dropboxschcs3202spa_cppspapql.cpp 78

...

最初,代码不会将谓词/条件作为引用传递,而是在我认为需要它的地方读取,但它似乎没有改变任何东西

modifiers.removeIf([modifiedVars, isModifies] ...

更新：我正在使用VS2010进行此项目