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ef6c43dc0c
Check each case value in turn while parsing it, performing the conversion to the switch type within the context of the expression itself. This will become necessary in order to properly handle cleanups for temporaries created as part of the case label (in an upcoming patch). For now it's just good hygiene. This necessitates moving the checking for the switch condition itself to earlier, so that the destination type is available when checking the case labels. As a nice side-effect, we get slightly improved diagnostic quality and error recovery by separating the case expression checking from the case statement checking and from tracking whether there are discarded case labels. llvm-svn: 338056
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 '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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