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150
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1 // RUN: %clang_cc1 -fsyntax-only -verify %s
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2
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3 void *test1(void) { return 0; }
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4
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5 void test2 (const struct {int a;} *x) {
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6 // expected-note@-1 {{variable 'x' declared const here}}
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7
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8 x->a = 10;
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221
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9 // expected-error-re@-1 {{cannot assign to variable 'x' with const-qualified type 'const struct (unnamed struct at {{.*}}assign.c:5:19) *'}}
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150
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10 }
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11
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12 typedef int arr[10];
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13 void test3() {
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14 const arr b; // expected-note {{variable 'b' declared const here}}
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15 const int b2[10]; // expected-note {{variable 'b2' declared const here}}
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16 b[4] = 1; // expected-error {{cannot assign to variable 'b' with const-qualified type 'const arr' (aka 'int const[10]')}}
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17 b2[4] = 1; // expected-error {{cannot assign to variable 'b2' with const-qualified type 'const int [10]'}}
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18 }
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19
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20 typedef struct I {
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21 const int a; // expected-note 4{{nested data member 'a' declared const here}} \
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22 expected-note 6{{data member 'a' declared const here}}
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23 } I;
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24 typedef struct J {
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25 struct I i;
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26 } J;
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27 typedef struct K {
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28 struct J *j;
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29 } K;
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30
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31 void testI(struct I i1, struct I i2) {
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32 i1 = i2; // expected-error {{cannot assign to variable 'i1' with const-qualified data member 'a'}}
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33 }
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34 void testJ1(struct J j1, struct J j2) {
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35 j1 = j2; // expected-error {{cannot assign to variable 'j1' with nested const-qualified data member 'a'}}
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36 }
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37 void testJ2(struct J j, struct I i) {
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38 j.i = i; // expected-error {{cannot assign to non-static data member 'i' with const-qualified data member 'a'}}
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39 }
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40 void testK1(struct K k, struct J j) {
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41 *(k.j) = j; // expected-error {{cannot assign to lvalue with nested const-qualified data member 'a'}}
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42 }
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43 void testK2(struct K k, struct I i) {
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44 k.j->i = i; // expected-error {{cannot assign to non-static data member 'i' with const-qualified data member 'a'}}
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45 }
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46
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47 void testI_(I i1, I i2) {
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48 i1 = i2; // expected-error {{cannot assign to variable 'i1' with const-qualified data member 'a'}}
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49 }
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50 void testJ1_(J j1, J j2) {
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51 j1 = j2; // expected-error {{cannot assign to variable 'j1' with nested const-qualified data member 'a'}}
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52 }
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53 void testJ2_(J j, I i) {
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54 j.i = i; // expected-error {{cannot assign to non-static data member 'i' with const-qualified data member 'a'}}
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55 }
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56 void testK1_(K k, J j) {
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57 *(k.j) = j; // expected-error {{cannot assign to lvalue with nested const-qualified data member 'a'}}
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58 }
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59 void testK2_(K k, I i) {
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60 k.j->i = i; // expected-error {{cannot assign to non-static data member 'i' with const-qualified data member 'a'}}
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61 }
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62
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63 // PR39946: Recursive checking of hasConstFields caused stack overflow.
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64 struct L { // expected-note {{definition of 'struct L' is not complete until the closing '}'}}
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65 struct L field; // expected-error {{field has incomplete type 'struct L'}}
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66 };
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67 void testL(struct L *l) {
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68 *l = 0; // expected-error {{assigning to 'struct L' from incompatible type 'int'}}
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69 }
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70
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71 // Additionally, this example overflowed the stack when figuring out the field.
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72 struct M1; // expected-note {{forward declaration of 'struct M1'}}
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73 struct M2 {
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74 //expected-note@+1 {{nested data member 'field' declared const here}}
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75 const struct M1 field; // expected-error {{field has incomplete type 'const struct M1'}}
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76 };
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77 struct M1 {
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78 struct M2 field;
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79 };
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80
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81 void testM(struct M1 *l) {
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82 *l = 0; // expected-error {{cannot assign to lvalue with nested const-qualified data member 'field'}}
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83 }
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84
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85 struct N1; // expected-note {{forward declaration of 'struct N1'}}
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86 struct N2 {
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87 struct N1 field; // expected-error {{field has incomplete type 'struct N1'}}
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88 };
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89 struct N1 {
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90 struct N2 field;
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91 };
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92
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93 void testN(struct N1 *l) {
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94 *l = 0; // expected-error {{assigning to 'struct N1' from incompatible type 'int'}}
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95 }
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