at

pub fn at(self: Symtab, index: usize, tag: Tag) Record {
    const offset = index * Symbol.sizeOf();
    const raw = self.buffer[offset..][0..Symbol.sizeOf()];
    return switch (tag) {
        .symbol => .{ .symbol = asSymbol(raw) },
        .debug_info => .{ .debug_info = asDebugInfo(raw) },
        .func_def => .{ .func_def = asFuncDef(raw) },
        .weak_ext => .{ .weak_ext = asWeakExtDef(raw) },
        .file_def => .{ .file_def = asFileDef(raw) },
        .sect_def => .{ .sect_def = asSectDef(raw) },
    };
}