How to retrieve function names via `@typeInfo` in zig 0.17.0?

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,
1

I see some posts here example that older versions of zig allowed to retrieve function names via @typeInfo but I try to do it and there are only field names…

const anon = struct {
    tte: u32,
    pub fn ttr() void {}
};

const stripped = stripNamespace(anon);
pub fn main() !void {
    stripped.r(); // just to force evaluation of sstripped var
}

// needs to strip the `tt` prefix
fn stripNamespace(comptime space: type) type {
    const info = @typeInfo(space).@"struct";

    // @as(usize, 1)
    @compileLog(info.decl_names.len);

    // There are no entries for functions
    // @as([:0]const u8, "ttr"[0..3])
    for (info.decl_names) |name| {
        @compileLog(name);
    }

    return @TypeOf(info); // stub
}

Note the result is the same with field_names and decl_names. As far as I understand (from reading old posts and docs) field_names must really contain only field names while decl_names should be a superset of field_names and contain also functions and other stuff? (I am not sure what other stuff it could be except functions). And if this understanding is correct (unlikely) it means a compiler bug?

2

(post deleted by author)

3

When you do

    for (info.decl_names) |name| {
        @compileLog(name);
    }

you get @as([:0]const u8, "ttr"[0..3]), which is the function name.

When you do

    for (info.field_names) |name| {
        @compileLog(name);
    }

you get @as([:0]const u8, "tte"[0..3]), which is the field name.

2 Likes
4

I am definetely stupid sorry

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