Re: storage of string literals

On Sat, 11 May 2024 07:57:55 -0300, Johanne Fairchild
<jfairchild@tudado.org> wrote:

I don't think the standard says anything about where a string literal
would be allocated.  Could a compiler allocate on the stack string
literals defined inside a procedure?  (Can I say that ``string
literals'' are /defined/ or should use a different word?)  So that, for
instance, when the procedure dealWord (below) returns, token->category
would point nowhere.
>
--8<-------------------------------------------------------->8---
typedef struct Token stoken;
>
struct Token {
 char *category;
};
>
void dealWord(stoken *token) {
 token->category = "cat1";
 [...]
}
--8<-------------------------------------------------------->8---
>
Section 6.2.4 of C99 has title ``storage durations of objects''.  Point
4 says
>
 --8<-------------------------------------------------------->8---
 An object whose identifier is declared with no linkage and without the
 storage-class specifier static has automatic storage duration.
 --8<-------------------------------------------------------->8---
>
Are string literals objects?  Thanks!

Whether or not they are objects, section 6.2.5-6 of C11 states they
have static duration.  Consequently, each exists at a constant
location for the life of the program.  Whether that is on the stack or
not is an implementation detail.  The standard does not use the term
stack.

--
Remove del for email