A very confusing error just now:
\nerror: aggregate \u2018std::ofstream out\u2019 has incomplete type and cannot be defined<\/p>
from simple code:
\nstd::ofstream out;<\/p>
And the similar one:
\nerror: variable \u2018std::ofstream out\u2019 has initialiser but incomplete type<\/p>
from this code:
\nstd::ofstream out(fname.c_str(),std::ios_base::app);<\/p>
Using this didn’t help:
\n#include <iostream><\/p>
Using this also didn’t help:
\n#include <ofstream><\/p>
That was confusing me most, but now I see I’ve been getting “error: ofstream: No such file or directory” and I was missing it in the noise of other warnings and errors.<\/p>
The solution was simple:
\n#include <fstream>
\nYes, a very simple solution, but google wasn’t helping. If it had been saying “ofstream is not a member of std” I’d have known I was missing a header file; a strange error message has you looking in other places. (I guess another std header file is doing a forward declaration for ofstream, which is why we get “incomplete type”.)<\/p>\n","protected":false},"excerpt":{"rendered":"
A very confusing error just now: error: aggregate \u2018std::ofstream out\u2019 has incomplete type and cannot be definedfrom simple code: std::ofstream out;And the similar one: error: variable \u2018std::ofstream out\u2019 has initialiser but incomplete typefrom this code: std::ofstream out(fname.c_str(),std::ios_base::app);Using this didn’t help: #include <iostream>Using this also didn’t help: #include <ofstream>That was confusing me most, but now I…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_s2mail":"","footnotes":""},"categories":[38],"tags":[13,23],"class_list":["post-94","post","type-post","status-publish","format-standard","hentry","category-cpp","tag-c","tag-incomplete-type-and-cannot-be-defined"],"aioseo_notices":[],"_links":{"self":[{"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/posts\/94","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/comments?post=94"}],"version-history":[{"count":4,"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/posts\/94\/revisions"}],"predecessor-version":[{"id":98,"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/posts\/94\/revisions\/98"}],"wp:attachment":[{"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/media?parent=94"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/categories?post=94"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/digital-madness.in\/blog\/wp-json\/wp\/v2\/tags?post=94"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}