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[FunC] Require parenthesis in tricky bitwise precedence cases

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Example: "flags & 0xFF != 0" is equivalent to "flags & 1",
most likely it's unexpected.
Example: "a << 2 + 1" (equal to "a << 3", probably unexpected).

The only way to suppress this error for the programmer
is to use parenthesis.
This commit is contained in:
Aleksandr Kirsanov 2024-06-21 15:39:19 +03:00
parent 5867d52926
commit 79721d230e
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GPG key ID: B758BBAA01FFB3D3
10 changed files with 189 additions and 10 deletions
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25
crypto/func/auto-tests/tests/op_priority.fc
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@ -1,35 +1,44 @@
int justTrue() { return true; }
int test1(int x, int y, int z) method_id(101) {
return x > 0 & y > 0 & z > 0;
return (x > 0) & (y > 0) & (z > 0);
}
int test2(int x, int y, int z) method_id(102) {
return x > (0 & y > 0 & z > 0);
return x > (0 & (y > 0) & (z > 0));
}
int test3(int x, int y, int z) method_id(103) {
if (x < 0 | y < 0) {
if ((x < 0) | (y < 0)) {
return z < 0;
}
return x > 0 & y > 0;
return (x > 0) & (y > 0);
}
int test4(int x, int y, int mode) method_id(104) {
if (mode == 1) {
return x == 10 | (y == 20);
return (x == 10) | (y == 20);
} if (mode == 2) {
return x == 10 | y == 20;
return (x == 10) | (y == 20);
} else {
return x == (10 | (y == 20));
}
}
int test5(int status) method_id(105) {
return justTrue() & status == 1 & (justTrue() & status) == 1;
return justTrue() & (status == 1) & ((justTrue() & status) == 1);
}
() main() { }
int _<p(_ a, _ b) { return true; }
() main() {
;; ok to parse
var c = [
(3 & 3) > 0, 3 & (3 > 0), 3 & (_<_(3, 0)),
3 & _<p(3, 0), (1 & 2) ^ (3 | 4),
1 & ((1) == 1)
];
}
{-
TESTCASE | 101 | 1 2 3 | -1