gcc4.4

I use these two files here and here . I created a class in two separate files: modul1.h #ifndef MODUL1_H #define MODUL1_H #include <iostream> #include <fstream> #include "easylogger.h" class Modul1 { public: Modul1(std::string name); protected: private: easylogger::Logger *log; }; #endif // MODUL1_H and modul1.cpp #include "modul1.h" Modul1::Modul1(std::string name):log(new easylogger::Logger(name)) { //ctor //std::ofstream *f = new std::ofstream(name.c_str(), std::ios_base::app); //log->Stream(*f); //log->Level(easylogger::LEVEL_DEBUG); //LOG_DEBUG(*log, "ctor ende!"); } Now I want to use

This is only an issue on GCC versions prior to 4.4, this was fixed in GCC 4.5. Is it possible to tell the compiler the variable used in a switch fits within the provided case statements? In particular if it's a small range and there's a jump table generated. extern int a; main() { switch (a & 0x7) { // 0x7 == 111 values are 0-7 case 0: f0(); break; case 1: f1(); break; case 2: f2(); break; case 3: f3(); break; case 4: f4(); break; case 5: f5(); break; case 6: f6(); break; case 7: f7(); break; } } I tried xor'ing to low bits (as the example), using enums, using gcc_unreachable() to no avail.

I was expecting that in my following code: #include<stdio.h> int main(){ int i = 10; int j = 10; j = ++(i | i); printf("%d %d\n", j, i); j = ++(i & i); printf("%d %d\n", j, i); return 1; } expressions j = ++(i | i); and j = ++(i & i); will produce lvalue errors as below: x.c: In function ‘main’: x.c:6: error: lvalue required as increment operand x.c:9: error: lvalue required as increment operand But I surprised that above code compiled successfully, as below: ~$ gcc x.c -Wall ~$ ./a.out 11 11 12 12 Check the above code working correctly. While other operators produce error (as I understand).