// RUN: %clang_cc1 -fsyntax-only -verify -Wswitch-enum -Wcovered-switch-default -triple x86_64-linux-gnu %s
// RUN: %clang_cc1 -fsyntax-only -verify -Wswitch-enum -Wcovered-switch-default -triple x86_64-linux-gnu %s -fexperimental-new-constant-interpreter
void f (int z) {
while (z) {
default: z--; // expected-error {{statement not in switch}}
}
}
void foo(int X) {
switch (X) {
case 42: ; // expected-note {{previous case}}
case 5000000000LL: // expected-warning {{overflow}}
case 42: // expected-error {{duplicate case value '42'}}
;
case 100 ... 99: ; // expected-warning {{empty case range}}
case 43: ; // expected-note {{previous case}}
case 43 ... 45: ; // expected-error {{duplicate case value}}
case 100 ... 20000:; // expected-note {{previous case}}
case 15000 ... 40000000:; // expected-error {{duplicate case value}}
}
}
void test3(void) {
// empty switch;
switch (0); // expected-warning {{no case matching constant switch condition '0'}} \
// expected-warning {{switch statement has empty body}} \
// expected-note{{put the semicolon on a separate line to silence this warning}}
}
extern int g(void);
void test4(void)
{
int cond;
switch (cond) {
case 0 && g():
case 1 || g():
break;
}
switch(cond) {
case g(): // expected-error {{expression is not an integer constant expression}}
case 0 ... g(): // expected-error {{expression is not an integer constant expression}}
break;
}
switch (cond) {
case 0 && g() ... 1 || g():
break;
}
switch (cond) {
case g() // expected-error {{expression is not an integer constant expression}}
&& 0:
break;
}
switch (cond) {
case 0 ...
g() // expected-error {{expression is not an integer constant expression}}
|| 1:
break;
}
}
void test5(int z) {
switch(z) {
default: // expected-note {{previous case defined here}}
default: // expected-error {{multiple default labels in one switch}}
break;
}
}
void test6(void) {
char ch = 'a';
switch(ch) {
case 1234: // expected-warning {{overflow converting case value}}
break;
}
}
// PR5606
int f0(int var) {
switch (va) { // expected-error{{use of undeclared identifier 'va'}}
case 1:
break;
case 2:
return 1;
}
return 2;
}
void test7(void) {
enum {
A = 1,
B
} a;
switch(a) { //expected-warning{{enumeration value 'B' not handled in switch}}
case A:
break;
}
switch(a) {
case B:
case A:
break;
}
switch(a) {
case A:
case B:
case 3: // expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
break;
}
switch(a) {
case A:
case B:
case 3 ... //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
4: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
break;
}
switch(a) {
case 1 ... 2:
break;
}
switch(a) {
case 0 ... 2: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
break;
}
switch(a) {
case 1 ... 3: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
break;
}
switch(a) {
case 0 ... //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
3: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
break;
}
}
void test8(void) {
enum {
A,
B,
C = 1
} a;
switch(a) {
case A:
case B:
break;
}
switch(a) {
case A:
case C:
break;
}
switch(a) { //expected-warning{{enumeration value 'B' not handled in switch}}
case A:
break;
}
}
void test9(void) {
enum {
A = 3,
C = 1
} a;
switch(a) {
case 0: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
case 1:
case 2: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
case 3:
case 4: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
break;
}
}
void test10(void) {
enum {
A = 10,
C = 2,
B = 4,
D = 12
} a;
switch(a) {
case 0 ... //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
1: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
case 2 ... 4:
case 5 ... //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
9: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
case 10 ... 12:
case 13 ... //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
16: //expected-warning{{case value not in enumerated type 'enum (unnamed enum}}
break;
}
}
void test11(void) {
enum {
A = -1,
B,
C
} a;
switch(a) { //expected-warning{{enumeration value 'A' not handled in switch}}
case B:
case C:
break;
}
switch(a) { //expected-warning{{enumeration value 'A' not explicitly handled in switch}}
case B:
case C:
break;
default:
break;
}
}
void test12(void) {
enum {
A = -1,
B = 4294967286
} a;
switch(a) {
case A:
case B:
break;
}
}
typedef enum {
val1,
val2,
val3
} my_type_t;
int test13(my_type_t t) {
switch(t) { // expected-warning{{enumeration value 'val3' not handled in switch}}
case val1:
return 1;
case val2:
return 2;
}
return -1;
}
enum {
EC0 = 0xFFFF0000,
EC1 = 0xFFFF0001,
};
int test14(int a) {
switch(a) {
case EC0: return 0;
case EC1: return 1;
}
return 0;
}
void f1(unsigned x) {
switch (x) {
case -1: break;
default: break;
}
}
void test15(void) {
int i = 0;
switch (1) { // expected-warning {{no case matching constant switch condition '1'}}
case 0: i = 0; break;
case 2: i++; break;
}
}
void test16(void) {
const char c = '5';
switch (c) { // expected-warning {{no case matching constant switch condition '53'}}
case '6': return;
}
}
struct bitfield_member {
unsigned bf : 1;
};
// PR7359
void test17(int x) {
switch (x >= 17) { // expected-warning {{switch condition has boolean value}}
case 0: return;
}
switch ((int) (x <= 17)) {
case 0: return;
}
struct bitfield_member bm;
switch (bm.bf) { // no warning
case 0:
case 1:
return;
}
}
int test18(void) {
enum { A, B } a;
switch (a) {
case A: return 0;
case B: return 1;
case 7: return 1; // expected-warning {{case value not in enumerated type}}
default: return 2; // expected-warning {{default label in switch which covers all enumeration values}}
}
}
typedef enum {
kOne = 1,
} Ints;
void rdar110822110(Ints i)
{
switch (i) {
case kOne:
break;
case 2: // expected-warning {{case value not in enumerated type 'Ints'}}
break;
default: // expected-warning {{default label in switch which covers all enumeration values}}
break;
}
}
// PR9243
#define TEST19MACRO 5
void test19(int i) {
enum {
kTest19Enum1 = 7,
kTest19Enum2 = kTest19Enum1
};
const int a = 3;
switch (i) {
case 5: // expected-note {{previous case}}
case TEST19MACRO: // expected-error {{duplicate case value '5'}}
case 7: // expected-note {{previous case}}
case kTest19Enum1: // expected-error {{duplicate case value: '7' and 'kTest19Enum1' both equal '7'}} \
// expected-note {{previous case}}
case kTest19Enum1: // expected-error {{duplicate case value 'kTest19Enum1'}} \
// expected-note {{previous case}}
case kTest19Enum2: // expected-error {{duplicate case value: 'kTest19Enum1' and 'kTest19Enum2' both equal '7'}} \
// expected-note {{previous case}}
case (int)kTest19Enum2: //expected-error {{duplicate case value 'kTest19Enum2'}}
case 3: // expected-note {{previous case}}
case a: // expected-error {{duplicate case value: '3' and 'a' both equal '3'}} \
// expected-note {{previous case}}
case a: // expected-error {{duplicate case value 'a'}}
break;
}
}
// Allow the warning 'case value not in enumerated type' to be silenced with
// the following pattern.
//
// If 'case' expression refers to a static const variable of the correct enum
// type, then we count this as a sufficient declaration of intent by the user,
// so we silence the warning.
enum ExtendedEnum1 {
EE1_a,
EE1_b
};
enum ExtendedEnum1_unrelated { EE1_misc };
static const enum ExtendedEnum1 EE1_c = 100;
static const enum ExtendedEnum1_unrelated EE1_d = 101;
void switch_on_ExtendedEnum1(enum ExtendedEnum1 e) {
switch(e) {
case EE1_a: break;
case EE1_b: break;
case EE1_c: break; // no-warning
case EE1_d: break; // expected-warning {{case value not in enumerated type 'enum ExtendedEnum1'}}
// expected-warning@-1 {{comparison of different enumeration types in switch statement ('enum ExtendedEnum1' and 'enum ExtendedEnum1_unrelated')}}
}
}
void PR11778(char c, int n, long long ll) {
// Do not reject this; we don't have duplicate case values because we
// check for duplicates in the promoted type.
switch (c) case 1: case 257: ; // expected-warning {{overflow}}
switch (n) case 0x100000001LL: case 1: ; // expected-warning {{overflow}} expected-error {{duplicate}} expected-note {{previous}}
switch ((int)ll) case 0x100000001LL: case 1: ; // expected-warning {{overflow}} expected-error {{duplicate}} expected-note {{previous}}
switch ((long long)n) case 0x100000001LL: case 1: ;
switch (ll) case 0x100000001LL: case 1: ;
}
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