problem about incomplete-type-Collection of common programming errors

2 years ago
admin
2 minutes

  • Ben Voigt
    c++ c++11 pimpl-idiom incomplete-type gotw
    First read Herb’s Sutters GotW posts concerning pimpl in C++11:GotW #100: Compilation Firewalls (Difficulty: 6/10) GotW #101: Compilation Firewalls, Part 2 (Difficulty: 8/10)I’m having some trouble understanding the solution proposed in GotW #101. As far as I can understand, all the problems laboriously solved in GotW #100 are back with a vengeance:The pimpl members are out-of-line templates, and the definitions are not visible at the poi

  • aschepler
    c++ templates incomplete-type
    I am very surprised that on various sampled versions of g++, the following compiles without error or warning:// Adapted from boost::checked_delete() template inline void assert_complete() {typedef char type_must_

  • Potatoswatter
    c++ templates stl incomplete-type
    Sometimes it’s useful to instantiate a standard container with an incomplete type to obtain a recursive structure:struct multi_tree_node { // Does work in most implementationsstd::vector< multi_tree_node > child; };struct trie_node { // Does not work in most implementationsstd::map< char, trie_node > next; };This tends to work because containers don’t have members of type value_type or member functions that pass or return any value_type objects by value. The Standard doesn’t seem to say very much about incomplete template arguments, but there is one bit under C++11 §17.

  • Johannes Schaub – litb

  • Chubsdad
    c++ delete destructor incomplete-type
    Reference hereThat destructor will also implicitlycall the destructor of the auto_ptrobject. And that will delete thepointer it holds, that points to the Cobject – without knowing thedefinition of C! That appeared in the.cpp file where struct A’s constructoris defined.This was curious and then5.3.5/5 states – “I

  • FredOverflow

  • Nawaz
    c++ handles incomplete-type empty-class
    Microsoft’s GDI+ defines many empty classes to be treated as handles internally. For example, (source GdiPlusGpStubs.h)//Approach 1class GpGraphics {};class GpBrush {}; class GpTexture : public GpBrush {}; class GpSolidFill : public GpBrush {}; class GpLineGradient : public GpBrush {}; class GpPathGradient : public GpBrush {}; class GpHatch : public GpB

  • user1166025
    compilation incomplete-type
    if got a quite simple question (at least I hope so), but I cannot figure out what to do to tell g++ in what order to “complete” my classes. I reduced it to this simple example:base.h:#ifndef BASE_H_ #define BASE_H_#include “otherclass.h” class otherclass;class base {public:base(otherclass* other);protected:otherclass* m_other; };#endif /* BASE_H_ */derived.h:#ifndef DERIVED_H_ #define

Originally posted 2013-11-09 21:07:30.