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// RUN: %clang_cc1 -std=c++1z -verify %s
// RUN: %clang_cc1 -std=c++17 -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, "");
}
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