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