77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify %s
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// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -std=c++1z -Wc++14-compat -verify %s -DCPP17
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int f();
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void g() {
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if (int x = f()) { // expected-note 2{{previous definition}}
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int x; // expected-error{{redefinition of 'x'}}
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} else {
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int x; // expected-error{{redefinition of 'x'}}
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}
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}
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void h() {
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if (int x = f()) // expected-note 2{{previous definition}}
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int x; // expected-error{{redefinition of 'x'}}
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else
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int x; // expected-error{{redefinition of 'x'}}
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}
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void ifInitStatement() {
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int Var = 0;
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if (int I = 0; true) {}
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if (Var + Var; true) {}
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if (; true) {}
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#ifdef CPP17
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// expected-warning@-4 {{if initialization statements are incompatible with C++ standards before C++17}}
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// expected-warning@-4 {{if initialization statements are incompatible with C++ standards before C++17}}
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// expected-warning@-4 {{if initialization statements are incompatible with C++ standards before C++17}}
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#else
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// expected-warning@-8 {{'if' initialization statements are a C++17 extension}}
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// expected-warning@-8 {{'if' initialization statements are a C++17 extension}}
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// expected-warning@-8 {{'if' initialization statements are a C++17 extension}}
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#endif
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}
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void switchInitStatement() {
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int Var = 0;
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switch (int I = 0; Var) {}
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switch (Var + Var; Var) {}
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switch (; Var) {}
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#ifdef CPP17
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// expected-warning@-4 {{switch initialization statements are incompatible with C++ standards before C++17}}
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// expected-warning@-4 {{switch initialization statements are incompatible with C++ standards before C++17}}
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// expected-warning@-4 {{switch initialization statements are incompatible with C++ standards before C++17}}
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#else
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// expected-warning@-8 {{'switch' initialization statements are a C++17 extension}}
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// expected-warning@-8 {{'switch' initialization statements are a C++17 extension}}
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// expected-warning@-8 {{'switch' initialization statements are a C++17 extension}}
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#endif
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}
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// TODO: Better diagnostics for while init statements.
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void whileInitStatement() {
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while (int I = 10; I--); // expected-error {{expected ')'}}
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// expected-note@-1 {{to match this '('}}
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// expected-error@-2 {{use of undeclared identifier 'I'}}
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int Var = 10;
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while (Var + Var; Var--) {} // expected-error {{expected ')'}}
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// expected-note@-1 {{to match this '('}}
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// expected-error@-2 {{expected ';' after expression}}
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// expected-error@-3 {{expected expression}}
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// expected-warning@-4 {{while loop has empty body}}
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// expected-note@-5 {{put the semicolon on a separate line to silence this warning}}
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}
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// TODO: This is needed because clang can't seem to diagnose invalid syntax after the
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// last loop above. It would be nice to remove this.
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void whileInitStatement2() {
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while (; false) {} // expected-error {{expected expression}}
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// expected-error@-1 {{expected ';' after expression}}
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// expected-error@-2 {{expected expression}}
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}
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