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tests/lint: demonstrate another warning about pointer casts

This commit is contained in:
rillig 2022-06-24 21:02:10 +00:00
parent b2f8c42322
commit 79312644ef
1 changed files with 21 additions and 1 deletions
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22
tests/usr.bin/xlint/lint1/msg_247.c
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@ -1,4 +1,4 @@
/* $NetBSD: msg_247.c,v 1.24 2022/06/24 20:44:53 rillig Exp $ */
/* $NetBSD: msg_247.c,v 1.25 2022/06/24 21:02:10 rillig Exp $ */
# 3 "msg_247.c"
// Test for message: pointer cast from '%s' to '%s' may be troublesome [247]
@ -305,3 +305,23 @@ cast_between_first_member_struct(void *ptr)
return t2;
}
double *
unnecessary_cast_from_array_to_pointer(int dim)
{
static double storage_1d[10];
static double storage_2d[10][5];
if (dim == 1)
return (double *)storage_1d;
if (dim == -1)
return storage_1d;
if (dim == 2)
/* expect+1: warning: illegal combination of 'pointer to double' and 'pointer to array[5] of double' [184] */
return storage_2d;
/* expect+1: warning: pointer cast from 'pointer to array[5] of double' to 'pointer to double' may be troublesome [247] */
return (double *)storage_2d;
}