# Bug Tracker

ID 86🔗 2015-04-22 10:07:07 Closed (Not a Bug) glossaries 3.04 [argument] must be [{argument}

## Description

Hi Nicola,

while trying to imitate the interface of the nomencl package (at least what I'm using) i stumbled upon several bugs in the glossaries package:

There are several calls to macros with optional arguments inside the package.

You call

`\macro[argument that makes [] fail]`
As you don't have control over the content of the optional arguments, all arguments, including optional ones, must be enclosed by braces like
`\macro[{argument that works with []}]`
During macro expansion TeX removes one level of braces around the argument so you don't change the contents while you allow arguments to contain square brackets, which are normal characters for TeX.

The example shows how to work around the problem by adding the braces at some places. The macros are from version 2012/11/18 v3.04 (NLCT) of the glossaries package.

BTW: Using optional arguments side the same package that defines them is TeXnically not very elegant as recognising optional arguments costs several macro calls. As you know the the number of optional arguments used in the call, you can save these additional calls.

No mwe.tex

## Evaluation

I'm sorry I don't know why your mwe didn't get uploaded, but v3.04 is very old and any patches applied to those internal commands are unlikely to be compatible with the latest version.

The need to enclose nested `[]` within an optional argument is common to all LaTeX optional arguments and is not particular to glossaries, so I can't really consider this a bug in glossaries. I can't change the syntax of any of the commands as it would break compatibility.

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