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stage2: equality compare optional with non-optional

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This commit is contained in:
Andrew Kelley
2021-11-16 13:59:53 -07:00
parent 4eaf3c665e
commit 85e427e4b2
5 changed files with 165 additions and 68 deletions
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34
test/behavior/optional.zig
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@@ -103,3 +103,37 @@ test "nested optional field in struct" {
};
try expect(s.x.?.y == 127);
}
test "equality compare optional with non-optional" {
try test_cmp_optional_non_optional();
comptime try test_cmp_optional_non_optional();
}
fn test_cmp_optional_non_optional() !void {
var ten: i32 = 10;
var opt_ten: ?i32 = 10;
var five: i32 = 5;
var int_n: ?i32 = null;
try expect(int_n != ten);
try expect(opt_ten == ten);
try expect(opt_ten != five);
// test evaluation is always lexical
// ensure that the optional isn't always computed before the non-optional
var mutable_state: i32 = 0;
_ = blk1: {
mutable_state += 1;
break :blk1 @as(?f64, 10.0);
} != blk2: {
try expect(mutable_state == 1);
break :blk2 @as(f64, 5.0);
};
_ = blk1: {
mutable_state += 1;
break :blk1 @as(f64, 10.0);
} != blk2: {
try expect(mutable_state == 2);
break :blk2 @as(?f64, 5.0);
};
}