Generates incorrect code when variable is declared in the while loop parentheses #678
Description
Example:
#include <cstdio>
int next() {
static int i = 1;
return i++;
}
int main() {
while (int i = next()) {
printf("i=%d\n", i);
if (i >= 10) {
break;
}
}
}The generated code is:
#include <cstdio>
int next()
{
static int i = 1;
return i++;
}
int main()
{
while(static_cast<bool>(i)) {
printf("i=%d\n", i);
if(i >= 10) {
break;
}
}
return 0;
}It does not compile, because i is not declared. Also the call to next() is omitted.
test.cpp: In function ‘int main()’:
test.cpp:11:27: error: ‘i’ was not declared in this scope
11 | while(static_cast<bool>(i)) {
| ^
The expected result would be, for example, to create a local scope and a variable in the local scope (similar to what compiler does) and to not omit the call to next(). Something like this:
#include <cstdio>
int next()
{
static int i = 1;
return i++;
}
int main()
{
{
int i;
while(static_cast<bool>(i = next())) {
printf("i=%d\n", i);
if(i >= 10) {
break;
}
}
};
return 0;
}