@TypeInfo on @cImport crashes the compiler

[hollmmax]

using version 0.5.0+487134554

const std = @import("std");
const warn = std.debug.warn;
const c = @cImport({
    @cInclude("stdio.h");
});

const TypeId = @import("builtin").TypeId;

test "libC reflection" {
    switch (@typeInfo(c)) {
        TypeId.Struct => |items| {
            warn("{}\n", .{items.decls.len});
        },
        else => warn("{}\n", .{@typeName(c)}),
    }
}

[Vexu]

By doing items.decls.len you are forcing all declarations in the translated stdio.h into existence. That includes many long double related macros which are causing you to hit TODOs in the compiler since c_longdouble is currently completely broken #1188.

[lodi]

I also ran into this issue today. I thought maybe a simpler header would work...

const c = @cImport({
    @cInclude("stdbool.h");
});

But I get the same "TODO" compiler panic as OP. In fact, I also get a panic with an empty import...

const c = @cImport({
});

(zig 0.6.0)

---

Would be amazing if this worked though; we could use zig to generate c library bindings for other languages.