tbl-subcap with LaTeX tables

[cscheid]

Minimal repro from keep-md: true:

---
format: pdf
keep-tex: true
---

::: {#tbl-example .cell layout-ncol="2" tbl-cap='Example' tbl-subcap='["Cars","Pressure"]'}

```{.r .cell-code}
library(tinytable)
tt(head(cars)) |> theme_tt("tabular") |> 
  save_tt("latex") |> knitr::asis_output()
```

::: {.cell-output-display}
```{=latex}
\begin{tabular}{ll}
\hline
speed & dist \\ \hline
4 &  2 \\
4 & 10 \\
7 &  4 \\
7 & 22 \\
8 & 16 \\
9 & 10 \\
\hline
\end{tabular}
```
:::

```{.r .cell-code}
tt(head(pressure)) |> theme_tt("tabular")  |> 
  save_tt("latex") |> knitr::asis_output()
```

::: {.cell-output-display}
```{=latex}
\begin{tabular}{ll}
\hline
temperature & pressure \\ \hline
0 & 0.0002 \\
20 & 0.0012 \\
40 & 0.0060 \\
60 & 0.0300 \\
80 & 0.0900 \\
100 & 0.2700 \\
\hline
\end{tabular}
```
:::
:::

Discussed in #10324

^{Originally posted by vincentarelbundock July 18, 2024}

Description

Hi,

Thanks for all your work on Quarto and on this forum!

When a package produces markdown tables, the tbl-subcap functionality works as expected. However, when the package produces a LaTeX table, there is no subcaption.

Is it possible for Quarto to support subcaptions in LaTeX tables as well?

I'd love to get some clarification on this.

1. Are subcaptions only supported for markdown tables?
2. Are there plans to extend support for LaTeX tables as well?

Thanks!

---
format: pdf
---

```{r}
#| label: tbl-example
#| tbl-cap: "Example"
#| tbl-subcap: 
#|   - "Cars"
#|   - "Pressure"
#| layout-ncol: 2

library(tinytable)
tt(head(cars)) |> save_tt("markdown") |> knitr::asis_output()
tt(head(pressure)) |> save_tt("markdown") |> knitr::asis_output()
```

This doesn't work:

library(tinytable)
tt(head(cars)) |> save_tt("latex") |> knitr::asis_output()
tt(head(pressure)) |> save_tt("latex") |> knitr::asis_output()
```</div>