[Issue 20475] New: Struct of static array of strings is bitwise-compared instead of member-wise
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Tue Dec 31 17:30:55 UTC 2019
https://issues.dlang.org/show_bug.cgi?id=20475
Issue ID: 20475
Summary: Struct of static array of strings is bitwise-compared
instead of member-wise
Product: D
Version: D2
Hardware: x86_64
OS: Linux
Status: NEW
Severity: normal
Priority: P1
Component: dmd
Assignee: nobody at puremagic.com
Reporter: hsteoh at quickfur.ath.cx
Code:
------
struct S {
string[2] x;
}
void main() {
auto s = S(["a", "b"]);
auto t = S(["a", ""]);
t.x[1] ~= "b";
assert(s == t);
}
------
Expected result: assertion should pass.
Actual result: assertion fails.
Looking at the disassembly, it appears that the struct comparison with == is
implemented as a bitwise comparison, which is wrong because 'string' is not a
POD and therefore the static array member ought to be compared member-wise
rather that bitwise.
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