49 lines
2.0 KiB
C
49 lines
2.0 KiB
C
/* Test diagnostic messages for invalid lvalues and non-modifiable
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lvalues. */
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/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
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/* { dg-do compile } */
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/* { dg-options "" } */
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int a, b;
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void
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f0 (void)
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{
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(a+b) = 1; /* { dg-error "lvalue required as left operand of assignment" } */
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(a+b)++; /* { dg-error "lvalue required as increment operand" } */
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++(a+b); /* { dg-error "lvalue required as increment operand" } */
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(a+b)--; /* { dg-error "lvalue required as decrement operand" } */
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--(a+b); /* { dg-error "lvalue required as decrement operand" } */
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&(a+b); /* { dg-error "lvalue required as unary '&' operand" } */
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}
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const int c;
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const struct { int x; } d;
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struct { const int x; } e;
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const int *f;
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void
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f1 (void)
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{
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c = 1; /* { dg-error "assignment of read-only variable 'c'" } */
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d.x = 1; /* { dg-error "assignment of read-only variable 'd'" } */
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e.x = 1; /* { dg-error "assignment of read-only member 'x'" } */
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*f = 1; /* { dg-error "assignment of read-only location" } */
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c++; /* { dg-error "increment of read-only variable 'c'" } */
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d.x++; /* { dg-error "increment of read-only variable 'd'" } */
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e.x++; /* { dg-error "increment of read-only member 'x'" } */
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(*f)++; /* { dg-error "increment of read-only location" } */
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++c; /* { dg-error "increment of read-only variable 'c'" } */
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++d.x; /* { dg-error "increment of read-only variable 'd'" } */
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++e.x; /* { dg-error "increment of read-only member 'x'" } */
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++(*f); /* { dg-error "increment of read-only location" } */
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c--; /* { dg-error "decrement of read-only variable 'c'" } */
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d.x--; /* { dg-error "decrement of read-only variable 'd'" } */
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e.x--; /* { dg-error "decrement of read-only member 'x'" } */
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(*f)--; /* { dg-error "decrement of read-only location" } */
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--c; /* { dg-error "decrement of read-only variable 'c'" } */
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--d.x; /* { dg-error "decrement of read-only variable 'd'" } */
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--e.x; /* { dg-error "decrement of read-only member 'x'" } */
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--(*f); /* { dg-error "decrement of read-only location" } */
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}
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