llvm-project/clang/test/SemaCXX/warn-shadow.cpp

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// RUN: %clang_cc1 -verify -fsyntax-only -std=c++11 -Wshadow-all %s
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namespace {
int i; // expected-note {{previous declaration is here}}
}
namespace one {
namespace two {
int j; // expected-note {{previous declaration is here}}
typedef int jj; // expected-note 2 {{previous declaration is here}}
using jjj=int; // expected-note 2 {{previous declaration is here}}
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}
}
namespace xx {
int m;
typedef int mm;
using mmm=int;
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}
namespace yy {
int m;
typedef char mm;
using mmm=char;
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}
using namespace one::two;
using namespace xx;
using namespace yy;
void foo() {
int i; // expected-warning {{declaration shadows a variable in namespace '(anonymous)'}}
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int j; // expected-warning {{declaration shadows a variable in namespace 'one::two'}}
int m;
int mm;
int mmm;
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}
class A {
static int data; // expected-note 1 {{previous declaration}}
// expected-note@+1 1 {{previous declaration}}
int field;
int f1, f2, f3, f4; // expected-note 8 {{previous declaration is here}}
typedef int a1; // expected-note 2 {{previous declaration}}
using a2=int; // expected-note 2 {{previous declaration}}
// The initialization is safe, but the modifications are not.
A(int f1, int f2, int f3, int f4) // expected-note-re 4 {{variable 'f{{[0-4]}}' is declared here}}
: f1(f1) {
f1 = 3; // expected-warning {{modifying constructor parameter 'f1' that shadows a field of 'A'}}
f1 = 4; // one warning per shadow
f2++; // expected-warning {{modifying constructor parameter 'f2' that shadows a field of 'A'}}
--f3; // expected-warning {{modifying constructor parameter 'f3' that shadows a field of 'A'}}
f4 += 2; // expected-warning {{modifying constructor parameter 'f4' that shadows a field of 'A'}}
}
// The initialization is safe, but the modifications are not.
// expected-warning-re@+1 4 {{constructor parameter 'f{{[0-4]}}' shadows the field 'f{{[0-9]}}' of 'A'}}
A(int f1, int f2, int f3, int f4, double overload_dummy) {}
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void test() {
char *field; // expected-warning {{declaration shadows a field of 'A'}}
char *data; // expected-warning {{declaration shadows a static data member of 'A'}}
char *a1; // no warning
char *a2; // no warning
char *jj; // no warning
char *jjj; // no warning
}
void test2() {
typedef char field; // no warning
typedef char data; // no warning
typedef char a1; // expected-warning {{declaration shadows a typedef in 'A'}}
typedef char a2; // expected-warning {{declaration shadows a type alias in 'A'}}
typedef char jj; // expected-warning {{declaration shadows a typedef in namespace 'one::two'}}
typedef char jjj; // expected-warning {{declaration shadows a type alias in namespace 'one::two'}}
}
void test3() {
using field=char; // no warning
using data=char; // no warning
using a1=char; // expected-warning {{declaration shadows a typedef in 'A'}}
using a2=char; // expected-warning {{declaration shadows a type alias in 'A'}}
using jj=char; // expected-warning {{declaration shadows a typedef in namespace 'one::two'}}
using jjj=char; // expected-warning {{declaration shadows a type alias in namespace 'one::two'}}
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}
};
struct path {
using value_type = char;
typedef char value_type2;
struct iterator {
using value_type = path; // no warning
typedef path value_type2; // no warning
};
};
// TODO: this should warn, <rdar://problem/5018057>
class B : A {
int data;
static int field;
};
// rdar://8900456
namespace rdar8900456 {
struct Foo {
static void Baz();
static void Baz1();
static void Baz2();
private:
int Bar;
};
void Foo::Baz() {
double Bar = 12; // Don't warn.
}
void Foo::Baz1() {
typedef int Bar; // Don't warn.
}
void Foo::Baz2() {
using Bar=int; // Don't warn.
}
}
// http://llvm.org/PR9160
namespace PR9160 {
struct V {
V(int);
};
struct S {
V v;
static void m() {
if (1) {
V v(0);
}
}
};
}
extern int bob; // expected-note 1 {{previous declaration is here}}
typedef int bob1; // expected-note 2 {{previous declaration is here}}
using bob2=int; // expected-note 2 {{previous declaration is here}}
// rdar://8883302
void rdar8883302() {
extern int bob; // don't warn for shadowing.
}
void test8() {
int bob; // expected-warning {{declaration shadows a variable in the global namespace}}
int bob1; //no warning
int bob2; // no warning
}
void test9() {
typedef int bob; // no warning
typedef int bob1; // expected-warning {{declaration shadows a typedef in the global namespace}}
typedef int bob2; // expected-warning {{declaration shadows a type alias in the global namespace}}
}
void test10() {
using bob=int; // no warning
using bob1=int; // expected-warning {{declaration shadows a typedef in the global namespace}}
using bob2=int; // expected-warning {{declaration shadows a type alias in the global namespace}}
}
namespace rdar29067894 {
void avoidWarningWhenRedefining(int b) { // expected-note {{previous definition is here}}
int a = 0; // expected-note {{previous definition is here}}
int a = 1; // expected-error {{redefinition of 'a'}}
int b = 2; // expected-error {{redefinition of 'b'}}
using c=char; // expected-note {{previous definition is here}}
using c=int; // expected-error {{type alias redefinition with different types ('int' vs 'char')}}
typedef char d; // expected-note {{previous definition is here}}
typedef int d; // expected-error {{typedef redefinition with different types ('int' vs 'char')}}
using e=char; // expected-note {{previous definition is here}}
typedef int e; // expected-error {{type alias redefinition with different types ('int' vs 'char')}}
int f; // expected-note {{previous definition is here}}
using f=int; // expected-error {{redefinition of 'f'}}
using g=int; // expected-note {{previous definition is here}}
int g; // expected-error {{redefinition of 'g'}}
typedef int h; // expected-note {{previous definition is here}}
int h; // expected-error {{redefinition of 'h'}}
int k; // expected-note {{previous definition is here}}
typedef int k; // expected-error {{redefinition of 'k'}}
using l=char; // no warning or error.
using l=char; // no warning or error.
typedef char l; // no warning or error.
typedef char n; // no warning or error.
typedef char n; // no warning or error.
using n=char; // no warning or error.
}
}
Fix an assertion failure in FormatASTNodeDiagnosticArgument. Summary: The test being added in this patch used to cause an assertion failure: /build/./bin/clang -cc1 -internal-isystem /build/lib/clang/5.0.0/include -nostdsysteminc -verify -fsyntax-only -std=c++11 -Wshadow-all /src/tools/clang/test/SemaCXX/warn-shadow.cpp -- Exit Code: 134 Command Output (stderr): -- clang: /src/tools/clang/lib/AST/ASTDiagnostic.cpp:424: void clang::FormatASTNodeDiagnosticArgument(DiagnosticsEngine::ArgumentKind, intptr_t, llvm::StringRef, llvm::StringRef, ArrayRef<DiagnosticsEngine::ArgumentValue>, SmallVectorImpl<char> &, void *, ArrayRef<intptr_t>): Assertion `isa<NamedDecl>(DC) && "Expected a NamedDecl"' failed. #0 0x0000000001c7a1b4 PrintStackTraceSignalHandler(void*) (/build/./bin/clang+0x1c7a1b4) #1 0x0000000001c7a4e6 SignalHandler(int) (/build/./bin/clang+0x1c7a4e6) #2 0x00007f30880078d0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0xf8d0) #3 0x00007f3087054067 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35067) #4 0x00007f3087055448 abort (/lib/x86_64-linux-gnu/libc.so.6+0x36448) #5 0x00007f308704d266 (/lib/x86_64-linux-gnu/libc.so.6+0x2e266) #6 0x00007f308704d312 (/lib/x86_64-linux-gnu/libc.so.6+0x2e312) #7 0x00000000035b7f22 clang::FormatASTNodeDiagnosticArgument(clang::DiagnosticsEngine::ArgumentKind, long, llvm::StringRef, llvm::StringRef, llvm::ArrayRef<std::pair<clang::DiagnosticsEngine::ArgumentKind, long> >, llvm::SmallVectorImpl<char>&, void*, llvm::ArrayRef<long>) (/build/ ./bin/clang+0x35b7f22) #8 0x0000000001ddbae4 clang::Diagnostic::FormatDiagnostic(char const*, char const*, llvm::SmallVectorImpl<char>&) const (/build/./bin/clang+0x1ddbae4) #9 0x0000000001ddb323 clang::Diagnostic::FormatDiagnostic(char const*, char const*, llvm::SmallVectorImpl<char>&) const (/build/./bin/clang+0x1ddb323) #10 0x00000000022878a4 clang::TextDiagnosticBuffer::HandleDiagnostic(clang::DiagnosticsEngine::Level, clang::Diagnostic const&) (/build/./bin/clang+0x22878a4) #11 0x0000000001ddf387 clang::DiagnosticIDs::ProcessDiag(clang::DiagnosticsEngine&) const (/build/./bin/clang+0x1ddf387) #12 0x0000000001dd9dea clang::DiagnosticsEngine::EmitCurrentDiagnostic(bool) (/build/./bin/clang+0x1dd9dea) #13 0x0000000002cad00c clang::Sema::EmitCurrentDiagnostic(unsigned int) (/build/./bin/clang+0x2cad00c) #14 0x0000000002d91cd2 clang::Sema::CheckShadow(clang::NamedDecl*, clang::NamedDecl*, clang::LookupResult const&) (/build/./bin/clang+0x2d91cd2) Stack dump: 0. Program arguments: /build/./bin/clang -cc1 -internal-isystem /build/lib/clang/5.0.0/include -nostdsysteminc -verify -fsyntax-only -std=c++11 -Wshadow-all /src/tools/clang/test/SemaCXX/warn-shadow.cpp 1. /src/tools/clang/test/SemaCXX/warn-shadow.cpp:214:23: current parser token ';' 2. /src/tools/clang/test/SemaCXX/warn-shadow.cpp:213:26: parsing function body 'handleLinkageSpec' 3. /src/tools/clang/test/SemaCXX/warn-shadow.cpp:213:26: in compound statement ('{}') /build/tools/clang/test/SemaCXX/Output/warn-shadow.cpp.script: line 1: 15595 Aborted (core dumped) /build/./bin/clang -cc1 -internal-isystem /build/lib/clang/5.0.0/include -nostdsysteminc -verify -fsyntax-only -std=c++11 -Wshadow-all /src/tools/clang/test/SemaCXX/warn-shadow.cpp Reviewers: rsmith Reviewed By: rsmith Subscribers: krytarowski, cfe-commits Differential Revision: https://reviews.llvm.org/D33207 llvm-svn: 303325
2017-05-18 11:02:15 +08:00
extern "C" {
typedef int externC; // expected-note {{previous declaration is here}}
}
void handleLinkageSpec() {
typedef void externC; // expected-warning {{declaration shadows a typedef in the global namespace}}
}
namespace PR33947 {
void f(int a) {
struct A {
void g(int a) {}
A() { int a; }
};
}
}
int PR24718;
enum class X { PR24718 }; // Ok, not shadowing