forked from OSchip/llvm-project
92 lines
2.1 KiB
C++
92 lines
2.1 KiB
C++
|
// RUN: %clang_cc1 -std=c++1z -verify %s
|
||
|
|
||
|
void testIf() {
|
||
|
int x = 0;
|
||
|
if (x; x) ++x;
|
||
|
if (int t = 0; t) ++t; else --t;
|
||
|
|
||
|
if (int x, y = 0; y) // expected-note 2 {{previous definition is here}}
|
||
|
int x = 0; // expected-error {{redefinition of 'x'}}
|
||
|
else
|
||
|
int x = 0; // expected-error {{redefinition of 'x'}}
|
||
|
|
||
|
if (x; int a = 0) ++a;
|
||
|
if (x, +x; int a = 0) // expected-note 2 {{previous definition is here}} expected-warning {{unused}}
|
||
|
int a = 0; // expected-error {{redefinition of 'a'}}
|
||
|
else
|
||
|
int a = 0; // expected-error {{redefinition of 'a'}}
|
||
|
|
||
|
if (int b = 0; b)
|
||
|
;
|
||
|
b = 2; // expected-error {{use of undeclared identifier}}
|
||
|
}
|
||
|
|
||
|
void testSwitch() {
|
||
|
int x = 0;
|
||
|
switch (x; x) {
|
||
|
case 1:
|
||
|
++x;
|
||
|
}
|
||
|
|
||
|
switch (int x, y = 0; y) {
|
||
|
case 1:
|
||
|
++x;
|
||
|
default:
|
||
|
++y;
|
||
|
}
|
||
|
|
||
|
switch (int x, y = 0; y) { // expected-note 2 {{previous definition is here}}
|
||
|
case 0:
|
||
|
int x = 0; // expected-error {{redefinition of 'x'}}
|
||
|
case 1:
|
||
|
int y = 0; // expected-error {{redefinition of 'y'}}
|
||
|
};
|
||
|
|
||
|
switch (x; int a = 0) {
|
||
|
case 0:
|
||
|
++a;
|
||
|
}
|
||
|
|
||
|
switch (x, +x; int a = 0) { // expected-note {{previous definition is here}} expected-warning {{unused}}
|
||
|
case 0:
|
||
|
int a = 0; // expected-error {{redefinition of 'a'}} // expected-note {{previous definition is here}}
|
||
|
case 1:
|
||
|
int a = 0; // expected-error {{redefinition of 'a'}}
|
||
|
}
|
||
|
|
||
|
switch (int b = 0; b) {
|
||
|
case 0:
|
||
|
break;
|
||
|
}
|
||
|
b = 2; // expected-error {{use of undeclared identifier}}
|
||
|
}
|
||
|
|
||
|
constexpr bool constexpr_if_init(int n) {
|
||
|
if (int a = n; ++a > 0)
|
||
|
return true;
|
||
|
else
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
constexpr int constexpr_switch_init(int n) {
|
||
|
switch (int p = n + 2; p) {
|
||
|
case 0:
|
||
|
return 0;
|
||
|
case 1:
|
||
|
return 1;
|
||
|
default:
|
||
|
return -1;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void test_constexpr_init_stmt() {
|
||
|
constexpr bool a = constexpr_if_init(-2);
|
||
|
static_assert(!a, "");
|
||
|
static_assert(constexpr_if_init(1), "");
|
||
|
|
||
|
constexpr int b = constexpr_switch_init(-1);
|
||
|
static_assert(b == 1, "");
|
||
|
static_assert(constexpr_switch_init(-2) == 0, "");
|
||
|
static_assert(constexpr_switch_init(-5) == -1, "");
|
||
|
}
|