| 1 | // RUN: %clang_cc1 -std=c++1z -Wno-unused-value -verify %s |
|---|
| 2 | // RUN: %clang_cc1 -std=c++17 -Wno-unused-value -verify %s |
|---|
| 3 | |
|---|
| 4 | void testIf() { |
|---|
| 5 | int x = 0; |
|---|
| 6 | if (x; x) ++x; |
|---|
| 7 | if (int t = 0; t) ++t; else --t; |
|---|
| 8 | |
|---|
| 9 | if (int x, y = 0; y) // expected-note 2 {{previous definition is here}} |
|---|
| 10 | int x = 0; // expected-error {{redefinition of 'x'}} |
|---|
| 11 | else |
|---|
| 12 | int x = 0; // expected-error {{redefinition of 'x'}} |
|---|
| 13 | |
|---|
| 14 | if (x; int a = 0) ++a; |
|---|
| 15 | if (x, +x; int a = 0) // expected-note 2 {{previous definition is here}} |
|---|
| 16 | int a = 0; // expected-error {{redefinition of 'a'}} |
|---|
| 17 | else |
|---|
| 18 | int a = 0; // expected-error {{redefinition of 'a'}} |
|---|
| 19 | |
|---|
| 20 | if (int b = 0; b) |
|---|
| 21 | ; |
|---|
| 22 | b = 2; // expected-error {{use of undeclared identifier}} |
|---|
| 23 | } |
|---|
| 24 | |
|---|
| 25 | void testSwitch() { |
|---|
| 26 | int x = 0; |
|---|
| 27 | switch (x; x) { |
|---|
| 28 | case 1: |
|---|
| 29 | ++x; |
|---|
| 30 | } |
|---|
| 31 | |
|---|
| 32 | switch (int x, y = 0; y) { |
|---|
| 33 | case 1: |
|---|
| 34 | ++x; |
|---|
| 35 | default: |
|---|
| 36 | ++y; |
|---|
| 37 | } |
|---|
| 38 | |
|---|
| 39 | switch (int x, y = 0; y) { // expected-note 2 {{previous definition is here}} |
|---|
| 40 | case 0: |
|---|
| 41 | int x = 0; // expected-error {{redefinition of 'x'}} |
|---|
| 42 | case 1: |
|---|
| 43 | int y = 0; // expected-error {{redefinition of 'y'}} |
|---|
| 44 | }; |
|---|
| 45 | |
|---|
| 46 | switch (x; int a = 0) { |
|---|
| 47 | case 0: |
|---|
| 48 | ++a; |
|---|
| 49 | } |
|---|
| 50 | |
|---|
| 51 | switch (x, +x; int a = 0) { // expected-note {{previous definition is here}} |
|---|
| 52 | case 0: |
|---|
| 53 | int a = 0; // expected-error {{redefinition of 'a'}} // expected-note {{previous definition is here}} |
|---|
| 54 | case 1: |
|---|
| 55 | int a = 0; // expected-error {{redefinition of 'a'}} |
|---|
| 56 | } |
|---|
| 57 | |
|---|
| 58 | switch (int b = 0; b) { |
|---|
| 59 | case 0: |
|---|
| 60 | break; |
|---|
| 61 | } |
|---|
| 62 | b = 2; // expected-error {{use of undeclared identifier}} |
|---|
| 63 | } |
|---|
| 64 | |
|---|
| 65 | constexpr bool constexpr_if_init(int n) { |
|---|
| 66 | if (int a = n; ++a > 0) |
|---|
| 67 | return true; |
|---|
| 68 | else |
|---|
| 69 | return false; |
|---|
| 70 | } |
|---|
| 71 | |
|---|
| 72 | constexpr int constexpr_switch_init(int n) { |
|---|
| 73 | switch (int p = n + 2; p) { |
|---|
| 74 | case 0: |
|---|
| 75 | return 0; |
|---|
| 76 | case 1: |
|---|
| 77 | return 1; |
|---|
| 78 | default: |
|---|
| 79 | return -1; |
|---|
| 80 | } |
|---|
| 81 | } |
|---|
| 82 | |
|---|
| 83 | void test_constexpr_init_stmt() { |
|---|
| 84 | constexpr bool a = constexpr_if_init(-2); |
|---|
| 85 | static_assert(!a, ""); |
|---|
| 86 | static_assert(constexpr_if_init(1), ""); |
|---|
| 87 | |
|---|
| 88 | constexpr int b = constexpr_switch_init(-1); |
|---|
| 89 | static_assert(b == 1, ""); |
|---|
| 90 | static_assert(constexpr_switch_init(-2) == 0, ""); |
|---|
| 91 | static_assert(constexpr_switch_init(-5) == -1, ""); |
|---|
| 92 | } |
|---|
| 93 | |
|---|