Enc Extern Template

Enc Extern Template - The extern template feature is provided to enable software architects to reduce code bloat in individual object files for common instantiations of class function and as of C 14 variable templates in large scale C software systems The practical benefit is in reducing the physical size of libraries which might lead to improved link times

Extern templates to reduce binary size Sandor Dargo on Nov 7 2023 Dec 9 2023 8 min In my quest towards a smaller binary size someone asked me if I considered extern templates I did not I didn t even know about them But I was more than happy for the suggestion and now here I am to share what learned about extern templates What are they

Enc Extern Template

Enc Extern Template

In some cases, build times can be reduced taking advantage of appropriate techniques, such as improving modularity, turning off optimizations, using the pimpl idiom, forward declarations, precompiled headers, and so on. In addition, C++11 introduced extern template declarations ( n1448) that, to some extent, can help speed up compilation times.

Extern templates A template specialization can be explicitly declared as a way to suppress multiple instantiations For example include MyVector h extern template class MyVector int Suppresses implicit instantiation below MyVector int will be explicitly instantiated elsewhere void foo MyVector int v

Extern Templates To Reduce Binary Size Sandor Dargo S Blog

In C 11 Introduction to C 11 extern template is added to optimize the compile time and object size Earlier C compiler C 03 instantiate a template function or class whenever it encounters a fully defined template function or class If the template is used in multiple files then compiler must create multiple instances of template

ENC 723 Introduction

An extern template directive that names a class applies to the members of the class not the class itself It results in the implicit instantiation of the class as well as that of any nested classes extern template has no normative affect on inline functions A note should be included indicating that implementations are encouraged to suppress

Extern Template Embracing Modern C Safely Excerpt InformIT

Extern template int max int int This syntax is defined in the C 2011 standard but has been supported by G and other compilers since well before 2011 Explicit instantiations can be used for the largest or most frequently duplicated instances without having to know exactly which other instances are used in the rest of the program

Enc

Extern template MyStack int 6 MyStack void You can use the extern keyword to keep the compiler from generating the same instantiation code in more than one object module You must instantiate the function template by using the specified explicit template parameters in at least one linked module if the function is called

Lambda function expression. inline specifier. Dynamic exception specifications ( until C++17*) noexcept specifier (C++11) Exceptions. throw -expression. try - catch block. Namespaces. Namespace declaration.

Reduce Compilation Times With Extern Template Simplify C

Extern Template Usage Here are the rules for using extern templates A template instantiation must either follow an explicit template declaration in that translation unit or be in another translation unit This is similar to the usual use of extern the entity referenced must be defined somewhere

Enc Extern Template

Extern template MyStack int 6 MyStack void You can use the extern keyword to keep the compiler from generating the same instantiation code in more than one object module You must instantiate the function template by using the specified explicit template parameters in at least one linked module if the function is called

Extern templates to reduce binary size Sandor Dargo on Nov 7 2023 Dec 9 2023 8 min In my quest towards a smaller binary size someone asked me if I considered extern templates I did not I didn t even know about them But I was more than happy for the suggestion and now here I am to share what learned about extern templates What are they

C Why Won t extern Template Work With Shared ptr YouTube