Why "constructor-way" of declaring variable in "for-loop" allowed but in "if-statement" not allowed?
- by PiotrNycz
Consider this simple example:
/*1*/ int main() {
/*2*/ for (int i(7); i;){break;}
/*3*/ if (int i(7)) {}
/*4*/ }
Why line-2 compiles just fine, whilst line-3 gives the error? This is little strange to me why if-statement is in this aspect treated worse than for-loop?
If this is compiler specific - I tested with gcc-4.5.1:
prog.cpp: In function 'int main()':
prog.cpp:3:7: error: expected primary-expression before 'int'
prog.cpp:3:7: error: expected ')' before 'int'
I was inspired by this question
[UPDATE]
I know this compiles just fine:
/*1*/ int main() {
/*2*/ for (int i = 7; i;){break;}
/*3*/ if (int i = 7) {}
/*4*/ }
