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// RUN: %clang_cc1 -verify -std=c2y -Wall -pedantic -Wno-unused %s
/* WG14 N3410: No
* Slay Some Earthly Demons XI
*
* It is now ill-formed for the same identifier within a TU to have both
* internal and external linkage.
*/
void func1() {
extern int a; // #a
}
// This 'a' is the same as the one declared extern above.
static int a; /* expected-error {{static declaration of 'a' follows non-static declaration}}
expected-note@#a {{previous declaration is here}}
*/
static int b;
void func2() {
// This 'b' is the same as the one declaraed static above, but this is not
// ill-formed because of C2y 6.2.2p4, which gives this variable internal
// linkage because the previous declaration had internal linkage.
extern int b; // Ok
}
static int c, d;
void func3() {
int c; // no linkage, different object from the one declared above.
for (int d;;) {
// This 'c' is the same as the one declared at file scope, but because of
// the local scope 'c', the file scope 'c' is not visible.
// FIXME: This should be diagnosed under N3410.
extern int c;
// This 'd' is the same as the one declared at file scope as well, but
// because of the 'd' declared within the for loop, the file scope 'd' is
// also not visible, same as with 'c'.
// FIXME: This should be diagnosed under N3410.
extern int d;
}
for (static int e;;) {
extern int e; // Ok for the same reason as 'b' above.
}
}
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