c++ - Iterating over list of structs -

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i'm creating list of structs:

struct task{     int task_id;     bool is_done;     char* buffer;     int length;  } task; list<task> tasklist;

and trying iterate on tasks in order check is_done status:

    (std::list<task>::const_iterator iterator = tasklist.begin(), end = tasklist.end(); iterator != end; ++iterator) {          if(iterator->is_done) {             return 1;         } else {             return 2;         }     }

where wrong? get: missing template argument before '->' token

the iterator's operator-> dereferencing already. instead of

if(*iterator->is_done==true)

you need

if(iterator->is_done==true)

is equivalent to

if((*iterator).is_done==true)

which sidenote equivalent easier read

if((*iterator).is_done)

or

if(iterator->is_done)

. better, use std::any_of:

#include <algorithm>  ....  if (any_of(begin(tasklist), end(tasklist),      [](task const &t) { return t.is_done; })) {     return 1; } else {     return 2; }

informal note: there no need qualify any_of, begin , end std::, because tasklist of type std::list<?>, , c++-compiler functions in std-namespace already.


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