389 lines
9.4 KiB
C
389 lines
9.4 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify -Wswitch-enum -Wcovered-switch-default -triple x86_64-linux-gnu %s
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void f (int z) {
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while (z) {
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default: z--; // expected-error {{statement not in switch}}
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}
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}
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void foo(int X) {
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switch (X) {
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case 42: ; // expected-note {{previous case}}
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case 5000000000LL: // expected-warning {{overflow}}
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case 42: // expected-error {{duplicate case value '42'}}
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;
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case 100 ... 99: ; // expected-warning {{empty case range}}
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case 43: ; // expected-note {{previous case}}
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case 43 ... 45: ; // expected-error {{duplicate case value}}
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case 100 ... 20000:; // expected-note {{previous case}}
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case 15000 ... 40000000:; // expected-error {{duplicate case value}}
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}
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}
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void test3(void) {
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// empty switch;
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switch (0); // expected-warning {{no case matching constant switch condition '0'}} \
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// expected-warning {{switch statement has empty body}} \
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// expected-note{{put the semicolon on a separate line to silence this warning}}
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}
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extern int g();
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void test4()
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{
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int cond;
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switch (cond) {
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case 0 && g():
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case 1 || g():
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break;
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}
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switch(cond) {
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case g(): // expected-error {{expression is not an integer constant expression}}
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case 0 ... g(): // expected-error {{expression is not an integer constant expression}}
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break;
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}
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switch (cond) {
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case 0 && g() ... 1 || g():
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break;
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}
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switch (cond) {
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case g() // expected-error {{expression is not an integer constant expression}}
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&& 0:
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break;
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}
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switch (cond) {
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case 0 ...
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g() // expected-error {{expression is not an integer constant expression}}
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|| 1:
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break;
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}
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}
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void test5(int z) {
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switch(z) {
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default: // expected-note {{previous case defined here}}
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default: // expected-error {{multiple default labels in one switch}}
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break;
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}
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}
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void test6() {
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char ch = 'a';
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switch(ch) {
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case 1234: // expected-warning {{overflow converting case value}}
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break;
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}
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}
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// PR5606
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int f0(int var) {
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switch (va) { // expected-error{{use of undeclared identifier 'va'}}
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case 1:
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break;
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case 2:
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return 1;
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}
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return 2;
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}
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void test7() {
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enum {
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A = 1,
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B
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} a;
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switch(a) { //expected-warning{{enumeration value 'B' not handled in switch}}
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case A:
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break;
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}
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switch(a) {
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case B:
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case A:
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break;
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}
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switch(a) {
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case A:
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case B:
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case 3: // expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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break;
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}
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switch(a) {
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case A:
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case B:
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case 3 ... //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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4: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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break;
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}
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switch(a) {
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case 1 ... 2:
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break;
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}
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switch(a) {
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case 0 ... 2: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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break;
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}
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switch(a) {
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case 1 ... 3: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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break;
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}
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switch(a) {
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case 0 ... //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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3: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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break;
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}
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}
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void test8() {
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enum {
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A,
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B,
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C = 1
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} a;
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switch(a) {
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case A:
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case B:
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break;
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}
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switch(a) {
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case A:
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case C:
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break;
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}
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switch(a) { //expected-warning{{enumeration value 'B' not handled in switch}}
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case A:
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break;
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}
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}
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void test9() {
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enum {
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A = 3,
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C = 1
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} a;
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switch(a) {
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case 0: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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case 1:
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case 2: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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case 3:
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case 4: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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break;
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}
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}
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void test10() {
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enum {
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A = 10,
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C = 2,
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B = 4,
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D = 12
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} a;
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switch(a) {
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case 0 ... //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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1: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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case 2 ... 4:
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case 5 ... //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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9: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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case 10 ... 12:
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case 13 ... //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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16: //expected-warning{{case value not in enumerated type 'enum (anonymous enum}}
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break;
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}
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}
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void test11() {
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enum {
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A = -1,
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B,
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C
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} a;
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switch(a) { //expected-warning{{enumeration value 'A' not handled in switch}}
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case B:
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case C:
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break;
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}
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switch(a) { //expected-warning{{enumeration value 'A' not explicitly handled in switch}}
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case B:
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case C:
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break;
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default:
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break;
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}
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}
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void test12() {
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enum {
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A = -1,
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B = 4294967286
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} a;
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switch(a) {
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case A:
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case B:
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break;
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}
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}
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// <rdar://problem/7643909>
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typedef enum {
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val1,
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val2,
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val3
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} my_type_t;
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int test13(my_type_t t) {
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switch(t) { // expected-warning{{enumeration value 'val3' not handled in switch}}
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case val1:
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return 1;
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case val2:
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return 2;
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}
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return -1;
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}
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// <rdar://problem/7658121>
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enum {
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EC0 = 0xFFFF0000,
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EC1 = 0xFFFF0001,
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};
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int test14(int a) {
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switch(a) {
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case EC0: return 0;
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case EC1: return 1;
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}
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return 0;
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}
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void f1(unsigned x) {
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switch (x) {
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case -1: break;
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default: break;
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}
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}
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void test15() {
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int i = 0;
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switch (1) { // expected-warning {{no case matching constant switch condition '1'}}
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case 0: i = 0; break;
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case 2: i++; break;
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}
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}
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void test16() {
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const char c = '5';
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switch (c) { // expected-warning {{no case matching constant switch condition '53'}}
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case '6': return;
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}
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}
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// PR7359
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void test17(int x) {
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switch (x >= 17) { // expected-warning {{switch condition has boolean value}}
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case 0: return;
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}
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switch ((int) (x <= 17)) {
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case 0: return;
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}
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}
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int test18() {
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enum { A, B } a;
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switch (a) {
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case A: return 0;
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case B: return 1;
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case 7: return 1; // expected-warning {{case value not in enumerated type}}
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default: return 2; // expected-warning {{default label in switch which covers all enumeration values}}
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}
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}
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// rdar://110822110
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typedef enum {
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kOne = 1,
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} Ints;
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void rdar110822110(Ints i)
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{
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switch (i) {
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case kOne:
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break;
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case 2: // expected-warning {{case value not in enumerated type 'Ints'}}
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break;
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default: // expected-warning {{default label in switch which covers all enumeration values}}
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break;
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}
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}
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// PR9243
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#define TEST19MACRO 5
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void test19(int i) {
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enum {
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kTest19Enum1 = 7,
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kTest19Enum2 = kTest19Enum1
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};
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const int a = 3;
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switch (i) {
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case 5: // expected-note {{previous case}}
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case TEST19MACRO: // expected-error {{duplicate case value '5'}}
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case 7: // expected-note {{previous case}}
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case kTest19Enum1: // expected-error {{duplicate case value: '7' and 'kTest19Enum1' both equal '7'}} \
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// expected-note {{previous case}}
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case kTest19Enum1: // expected-error {{duplicate case value 'kTest19Enum1'}} \
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// expected-note {{previous case}}
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case kTest19Enum2: // expected-error {{duplicate case value: 'kTest19Enum1' and 'kTest19Enum2' both equal '7'}} \
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// expected-note {{previous case}}
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case (int)kTest19Enum2: //expected-error {{duplicate case value 'kTest19Enum2'}}
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case 3: // expected-note {{previous case}}
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case a: // expected-error {{duplicate case value: '3' and 'a' both equal '3'}} \
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// expected-note {{previous case}}
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case a: // expected-error {{duplicate case value 'a'}}
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break;
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}
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}
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// Allow the warning 'case value not in enumerated type' to be silenced with
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// the following pattern.
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//
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// If 'case' expression refers to a static const variable of the correct enum
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// type, then we count this as a sufficient declaration of intent by the user,
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// so we silence the warning.
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enum ExtendedEnum1 {
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EE1_a,
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EE1_b
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};
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enum ExtendedEnum1_unrelated { EE1_misc };
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static const enum ExtendedEnum1 EE1_c = 100;
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static const enum ExtendedEnum1_unrelated EE1_d = 101;
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void switch_on_ExtendedEnum1(enum ExtendedEnum1 e) {
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switch(e) {
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case EE1_a: break;
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case EE1_b: break;
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case EE1_c: break; // no-warning
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case EE1_d: break; // expected-warning {{case value not in enumerated type 'enum ExtendedEnum1'}}
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// expected-warning@-1 {{comparison of two values with different enumeration types in switch statement ('enum ExtendedEnum1' and 'const enum ExtendedEnum1_unrelated')}}
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}
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}
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void PR11778(char c, int n, long long ll) {
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// Do not reject this; we don't have duplicate case values because we
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// check for duplicates in the promoted type.
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switch (c) case 1: case 257: ; // expected-warning {{overflow}}
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switch (n) case 0x100000001LL: case 1: ; // expected-warning {{overflow}} expected-error {{duplicate}} expected-note {{previous}}
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switch ((int)ll) case 0x100000001LL: case 1: ; // expected-warning {{overflow}} expected-error {{duplicate}} expected-note {{previous}}
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switch ((long long)n) case 0x100000001LL: case 1: ;
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switch (ll) case 0x100000001LL: case 1: ;
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}
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