HP aC++/HP C A.06.28 Programmer's Guide Integrity servers (769150-001, March 2014)

void f(const parm);
const n = 3;
main()
The equivalent, valid HP aC++ code follows:
void f(const int parm);
const int n = 3;
int main()
The for Statement, New Scoping Rules
In HP C++, variables declared in the initializer list are allowed after the for statement. In the
ANSI/ISO C++ International Standard, variables declared in the initializer list are not allowed
after the for statement. HP aC++ provides this functionality when you specify the following aCC
command-line option:
-WC,-ansi_for_scope,on
If you do not specify this option, (or you specify the -WC,-ansi_for_scope,off option), by
default, the new rules do not take effect.
In this scenario, HP aC++ provides this standard functionality as an option to ease conversion of
existing code to the standard. No code change is currently required.
Future plans are to make the ANSI/ISO C++ International Standard syntax the default. HP
recommends that you correct your code, by moving the declaration of the for loop variable to its
enclosing block.
Example:
The following code currently compiles without errors with HP C++ and HP aC++. In the future, HP
aC++, will generate an error.
int main(int argc) {
for (int i = 1; i < argc; ++i) {
}
for (i = 0; i < argc; ++i) {
}
}
Correct the code as follows:
int main(int argc) {
int i;
for (i = 1; i < argc; ++i) {
}
for (i = 0; i < argc; ++i) {
}
}
This code complies with ANSI/ISO C++ International Standard syntax and compiles with both
compilers.
struct as Template Type Parameter is Permitted
In HP C++, an error is generated when a struct is used as a template type parameter. In HP
aC++, when a struct is used as a template type parameter, it is correctly compiled, in accordance
with draft standard syntax. This is a new feature.
Example:
template class A {
public:
struct T a;
};
struct B {};
A b;
The following error appears when you compile this code with HP C++:
212 Migrating from HP C++ (cfront) to HP aC++