incorrect error: cannot implicitly convert expression of type int to dchar

[dlangBugzillaToGithub]

Dennis (@dkorpel) reported this on 2020-01-03T16:52:39Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=20477

CC List

• Dominikus Dittes Scherkl

Description

```
void main() {
    static assert(is(int:dchar));
    int a = 1114112;
    dchar b = a;
    dchar c = 1114112;
}
```

On variable c it says Error: cannot implicitly convert expression 1114112 of type int to dchar. The value is above `dchar.max`, but since `is(int:dchar)` the error "cannot implicitly convert" is false.

Related: https://issues.dlang.org/show_bug.cgi?id=14627

[dlangBugzillaToGithub]

dominikus commented on 2020-01-04T15:40:15Z

dchar is designed to contain unicode values, which are limited to the range 0x00000000 to 0x0010FFFF == 1114111, so the given literal is outside this range.