fn appendErrorTok( astgen: *AstGen, token: Ast.TokenIndex, comptime format: []const u8, args: anytype, ) !void
fn appendErrorTok( astgen: *AstGen, token: Ast.TokenIndex, comptime format: []const u8, args: anytype, ) !void { try astgen.appendErrorTokNotesOff(token, 0, format, args, &[0]u32{}); }