Character object in R as parameter should stays parameter (especially 029 case)

[cderv]

From

• How do I provide string values to params which would otherwise be parsed as numbers? quarto-cli#12736

---
title: "Params"
format: markdown
params:
  number: null
---

```{r}
print(params$number)
```

quarto::quarto_render("param.qmd", execute_params = list(number = "029"))

This would print number as explained in the upstream issue. The solution is to pass quotes because this is 1.2 spec used in Quarto.

quarto render param.qmd -P number:'"029"'

and in YAML file it should be

number: '029'

However, this is not written like than by the R package because write_yaml() will do YAML v1.1 spec.

Doing

quarto::quarto_render("index.qmd", execute_params = list(number = "'029'"))

will not work because the YAML written is

number: '''029'''

We need to handle this case specifically in an handler, or just quote all the character type from R to yaml conversion 🤔

[cderv]

In fact it requires to use the attributes support

x <- "029"
attr(x, "quoted") <- TRUE
yaml::as.yaml(list(number = x))
#> [1] "number: \"029\"\n"

So this would need to be done like this

x <- "029"
attr(x, "quoted") <- TRUE
quarto::quarto_render("index.qmd", execute_params = list(number = x))

Maybe we can detect those string with leading 0 and always do that - this is really to know for a user