c - Two functions with same name: One static How to declare in header file -



c - Two functions with same name: One static How to declare in header file -

i have 2 .c files names: main.c , test2.c. defined function: void testextern2() in main.c. defined function same name static: static void testextern2() in test2.c. set declaration: void testextern2(); in header file.

i compile:

$ gcc main.c test2.c , error: error: static declaration of 'testextern2' follows non-static declaration

is there way around this. mean want provide function declaration in header file need maintain name of both functions same.

the same function cannot declared both static , non-static in same translation unit. if test2.c genuinely needs static function named testextern2 must not include header file conflicting declaration of function.

that doesn't prevent declaring (non-static) function in header file; means source file containing static version must not include header, or else header must allow utilize conditional compilation suppress non-static version of declaration necessary. example:

testextern.h

#ifndef testextern_h #define testextern_h #ifndef suppress_testextern2 int testextern2(int); #endif #endif

test2.c

#define suppress_testextern2 #include "testextern.h" static double testextern2(const char *s) { /* ... */ }

do note, however, "testextern2" exceedingly unusual name static function, because static linkage , external linkage mutually exclusive. understand, too, 2 distinct functions having same name not in confer advantage on whatsoever. despite sharing name, different functions, , in given translation unit, every appearance of name refer same 1 of them. can lead confusion, however, because name refer different functions in different translation units.

it much improve give different functions different names, @ to the lowest degree 1 has external linkage.

c header-files

Comments

Post a Comment

Popular posts from this blog

Delphi change the assembly code of a running process -

Delphi change the assembly code of a running process - i'm trying alter address 00741fa5 has push test.009e721c . alter push test.009e71c8 . procedure callback; asm force $9e71c8 end; procedure tform2.btn1click(sender: tobject); var ppid :dword; pprocess : cardinal; begin getwindowthreadprocessid(findwindow(nil,pchar('test')), @ppid); pprocess := openprocess(process_all_access, false, ppid); injectasm(pprocess, $741fa5, 10, integer(@callback), 0); end; here injectasm function (with error checking) function injectasm(process: longword; injectaddress, injectsize, codeaddress, codesize : integer): pointer; var csize, rsize : integer; replaced : array of byte; jmp : array [0..4] of byte; jmpaddress : integer; nopv : byte; : integer; nbr: ulong_ptr; begin //injectsize must equal or greater 5, because need space our //(far) jmp wwxxyyzz instruction //if there's no space, inject in place of few instructions if injectsize ...
Read more

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) -

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) - hello have problem hibernate , jackson. have 2 pojos @entity @table(name = "users") public class user implements serializable { static final long serialversionuid = 4235637833262722256l; @id @generatedvalue private int id; @column(name = "creation_date") private date creationdate; @column(name = "first_name") private string firstname; @column(name = "last_name") private string lastname; @version @column(name = "version") private int version; @column(name = "e_mail") private string email; @column(name = "enabled") private boolean enabled; @column(name = "login") private string login; @column(name = "password") private string password; @jsonmanagedreference("role") @onetomany(mappedby = "user", cascade = cascadetype.all,fetch = fetchtyp...
Read more

C++ 11 "class" keyword -

C++ 11 "class" keyword - i've started using c++ 11 little bit more , have few questions on special uses of class keyword. know it's used declare class, there's 2 instances have seen don't understand: method<class t>(); and class class_name *var; why precede typename keyword class in first example, , keyword pointer in sec example? that known elaborated type specifier , necessary when class name "shadowed" or "hidden" , need explicit. class t { }; // love of god don't t t; t t2; if compiler smart, give these warnings: main.cpp:15:5: error: must utilize 'class' tag refer type 't' in scope t t2; ^ class main.cpp:14:7: note: class 't' hidden non-type declaration of 't' here t t; ^ if class not defined, deed forwards declaration. for example: template <typename t> void method() { using type = typename t::value_type; } method...
Read more