?? wparentheses-2.c
字號:
/* Test operation of -Wparentheses. Warnings for X<=Y<=Z should be there rather than hidden in -Wextra. *//* Origin: Joseph Myers <jsm@polyomino.org.uk> *//* { dg-do compile } *//* { dg-options "-Wparentheses" } */int foo (int);intbar (int a, int b, int c){ foo (a <= b <= c); /* { dg-warning "comparison" "correct warning" } */ foo ((a <= b) <= c); foo (a <= (b <= c)); foo (1 <= 2 <= c); /* { dg-warning "comparison" "correct warning" } */ foo ((1 <= 2) <= c); foo (1 <= (2 <= c)); foo (1 <= 2 <= 3); /* { dg-warning "comparison" "correct warning" } */ foo ((1 <= 2) <= 3); foo (1 <= (2 <= 3)); foo (a > b > c); /* { dg-warning "comparison" "correct warning" } */ foo ((a > b) > c); foo (a > (b > c)); foo (1 > 2 > c); /* { dg-warning "comparison" "correct warning" } */ foo ((1 > 2) > c); foo (1 > (2 > c)); foo (1 > 2 > 3); /* { dg-warning "comparison" "correct warning" } */ foo ((1 > 2) > 3); foo (1 > (2 > 3)); foo (a < b <= c); /* { dg-warning "comparison" "correct warning" } */ foo ((a < b) <= c); foo (a < (b <= c)); foo (1 < 2 <= c); /* { dg-warning "comparison" "correct warning" } */ foo ((1 < 2) <= c); foo (1 < (2 <= c)); foo (1 < 2 <= 3); /* { dg-warning "comparison" "correct warning" } */ foo ((1 < 2) <= 3); foo (1 < (2 <= 3)); foo (a <= b > c); /* { dg-warning "comparison" "correct warning" } */ foo ((a <= b) > c); foo (a <= (b > c)); foo (1 <= 2 > c); /* { dg-warning "comparison" "correct warning" } */ foo ((1 <= 2) > c); foo (1 <= (2 > c)); foo (1 <= 2 > 3); /* { dg-warning "comparison" "correct warning" } */ foo ((1 <= 2) > 3); foo (1 <= (2 > 3)); foo (a <= b == c); /* { dg-warning "comparison" "correct warning" } */ foo ((a <= b) == c); foo (a <= (b == c)); foo (1 <= 2 == c); /* { dg-warning "comparison" "correct warning" } */ foo ((1 <= 2) == c); foo (1 <= (2 == c)); foo (1 <= 2 == 3); /* { dg-warning "comparison" "correct warning" } */ foo ((1 <= 2) == 3); foo (1 <= (2 == 3)); foo (a != b != c); /* { dg-warning "comparison" "correct warning" } */ foo ((a != b) != c); foo (a != (b != c)); foo (1 != 2 != c); /* { dg-warning "comparison" "correct warning" } */ foo ((1 != 2) != c); foo (1 != (2 != c)); foo (1 != 2 != 3); /* { dg-warning "comparison" "correct warning" } */ foo ((1 != 2) != 3); foo (1 != (2 != 3));}
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