Files
zig/test/cases/compile_errors/add_on_undefined_value.zig
Techatrix ec358d6db5 sema: fix safe integer arithmetic operations on undefined values
Previously `@as(i64, undefined) +% 1` would produce `@as(@TypeOf(undefined), undefined)` which now gives `@as(i64, undefined)`.
Previously `@as(i64, undefined) +| 1` would hit an assertion which now gives `@as(i64, undefined)`.
2024-01-16 16:27:31 -08:00

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Zig

comptime {
const undef: i64 = undefined;
const not_undef: i64 = 32;
// If either of the operands are zero, then the other operand is returned.
@compileLog(undef + 0);
@compileLog(not_undef + 0);
@compileLog(0 + undef);
@compileLog(0 + not_undef);
_ = undef + undef;
}
// error
// backend=stage2
// target=native
//
// :11:17: error: use of undefined value here causes undefined behavior
//
// Compile Log Output:
// @as(i64, undefined)
// @as(i64, 32)
// @as(i64, undefined)
// @as(i64, 32)