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<!-- Copyright (C) 2021 by Jinwen XU -->
# ccref - cleveref with proper definite articles
"ccref" is a LaTeX package aimed at helping `\cref` addressing the definite articles properly (especially for the article contractions in many European languages).
## Motivation
By default, when using cleveref's `\cref` to reference theorem-like environments, the names do not contain definite articles. This may be acceptable for English, but certainly not good enough for languages such as French, Italian, Portuguese, Spanish, etc. -- in these cases there shall be grammatical errors and would give you a strong feeling that it is machine-generated.
As an example, if we define the French names to be:
```latex
\crefname{theorem}{le théorème}{les théorème}
\crefname{proposition}{la proposition}{les propositions}
```
Then when one writes
```latex
On peut le déduire de \cref{thm1,thm2,prop3}.
```
(which means "*We can deduce this from ...*") the result would be
> On peut le déduire **de les** théorèmes 1 et 2 et **la** proposition 3.
which is wrong, as the correct result should be:
> On peut le déduire **des** théorèmes 1 et 2 et **de la** proposition 3.
`\cref` would not be able to handle such cases correctly.
## The solution
Thus, it would be better to have a new command `\ccref[<prep>]{<labels>}`, and to use it like
```
\ccref*[de]{thm1,thm2,prop3}
```
in order to get "*des théorèmes 1 et 2 et de la proposition 3*".
> The asterisk `*` here indicates that the preposition "de" will act on every definite article.
# Usage
Just load the package with
```latex
\usepackage{ccref}
```
> "ccref" uses "cleveref" internally, thus it should usually be placed at the last of your preamble.
And then you can use the command `\ccref` as follows:
- `\ccref[<prep>]{<labels>}`
- This will pass the `<prep>` to the first definite article.
- `\ccref*[<prep>]{<labels>}`
- This will pass the `<prep>` to every definite article.
However, before using it, you should first define the `\crefname`s carefully. The definite article in `\crefname`s needs to be marked manually using `\ccmarkart`, for example:
```latex
\crefname{theorem}{\ccmarkart{le} théorème}{\ccmarkart{les} théorème}
```
# License
This work is released under the LaTeX Project Public License, v1.3c or later.
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