Why does the following code compiles?
void foo(const LPSTR str) {
str[0] = '\0';
}
while
void foo(LPCSTR str) {
str[0] = '\0';
}
and
void foo(const char* str) {
str[0] = '\0';
}
does not.
It's actually LPTSTR in my code so const version is LPCTSTR... So can I increase code readability by having something like const LPTSTR, or it must be either LPCTSTR or const TCHAR*?
A typedef "seals" the type from outside modification. LPSTR is a char *, period. Adding const to that (as const LPSTR) adds the const to the outside: you get a char * const.
What you want is to "inject" the const (apply it the pointee, not to the pointer), and that is not possible through a simple declaration syntax with a typedef. So it must be LPCSTR, the typedef created for exactly this purpose.
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