| 1 | // RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify %s |
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| 2 | // RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -std=c++1z -Wc++14-compat -verify %s -DCPP17 |
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| 3 | |
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| 4 | int f(); |
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| 5 | |
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| 6 | void g() { |
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| 7 | if (int x = f()) { // expected-note 2{{previous definition}} |
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| 8 | int x; // expected-error{{redefinition of 'x'}} |
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| 9 | } else { |
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| 10 | int x; // expected-error{{redefinition of 'x'}} |
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| 11 | } |
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| 12 | } |
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| 13 | |
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| 14 | void h() { |
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| 15 | if (int x = f()) // expected-note 2{{previous definition}} |
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| 16 | int x; // expected-error{{redefinition of 'x'}} |
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| 17 | else |
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| 18 | int x; // expected-error{{redefinition of 'x'}} |
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| 19 | } |
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| 20 | |
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| 21 | void ifInitStatement() { |
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| 22 | int Var = 0; |
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| 23 | |
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| 24 | if (int I = 0; true) {} |
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| 25 | if (Var + Var; true) {} |
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| 26 | if (; true) {} |
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| 27 | #ifdef CPP17 |
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| 28 | // expected-warning@-4 {{if initialization statements are incompatible with C++ standards before C++17}} |
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| 29 | // expected-warning@-4 {{if initialization statements are incompatible with C++ standards before C++17}} |
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| 30 | // expected-warning@-4 {{if initialization statements are incompatible with C++ standards before C++17}} |
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| 31 | #else |
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| 32 | // expected-warning@-8 {{'if' initialization statements are a C++17 extension}} |
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| 33 | // expected-warning@-8 {{'if' initialization statements are a C++17 extension}} |
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| 34 | // expected-warning@-8 {{'if' initialization statements are a C++17 extension}} |
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| 35 | #endif |
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| 36 | } |
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| 37 | |
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| 38 | void switchInitStatement() { |
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| 39 | int Var = 0; |
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| 40 | |
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| 41 | switch (int I = 0; Var) {} |
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| 42 | switch (Var + Var; Var) {} |
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| 43 | switch (; Var) {} |
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| 44 | #ifdef CPP17 |
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| 45 | // expected-warning@-4 {{switch initialization statements are incompatible with C++ standards before C++17}} |
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| 46 | // expected-warning@-4 {{switch initialization statements are incompatible with C++ standards before C++17}} |
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| 47 | // expected-warning@-4 {{switch initialization statements are incompatible with C++ standards before C++17}} |
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| 48 | #else |
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| 49 | // expected-warning@-8 {{'switch' initialization statements are a C++17 extension}} |
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| 50 | // expected-warning@-8 {{'switch' initialization statements are a C++17 extension}} |
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| 51 | // expected-warning@-8 {{'switch' initialization statements are a C++17 extension}} |
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| 52 | #endif |
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| 53 | } |
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| 54 | |
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| 55 | // TODO: Better diagnostics for while init statements. |
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| 56 | void whileInitStatement() { |
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| 57 | while (int I = 10; I--); // expected-error {{expected ')'}} |
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| 58 | // expected-note@-1 {{to match this '('}} |
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| 59 | // expected-error@-2 {{use of undeclared identifier 'I'}} |
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| 60 | |
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| 61 | int Var = 10; |
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| 62 | while (Var + Var; Var--) {} // expected-error {{expected ')'}} |
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| 63 | // expected-note@-1 {{to match this '('}} |
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| 64 | // expected-error@-2 {{expected ';' after expression}} |
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| 65 | // expected-error@-3 {{expected expression}} |
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| 66 | // expected-warning@-4 {{while loop has empty body}} |
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| 67 | // expected-note@-5 {{put the semicolon on a separate line to silence this warning}} |
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| 68 | } |
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| 69 | |
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| 70 | // TODO: This is needed because clang can't seem to diagnose invalid syntax after the |
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| 71 | // last loop above. It would be nice to remove this. |
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| 72 | void whileInitStatement2() { |
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| 73 | while (; false) {} // expected-error {{expected expression}} |
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| 74 | // expected-error@-1 {{expected ';' after expression}} |
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| 75 | // expected-error@-2 {{expected expression}} |
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| 76 | } |
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| 77 | |
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