What is the HCL standard library? Is this documented anywhere?

[MorganR]

I have noticed that HCL has a standard library that seems to provide various functions, and I've seen examples of more advanced syntax such as the for loop in this comment, but I can't find this documented anywhere.

I apologise in advance if I'm just being a bit thick. Is there anywhere that these functions and basic syntax, like for loops and conditionals, are documented for HCL? I can find very few examples of this sort of dynamic functionality in the docs or guides.

I'm ultimately hoping that I can conditionally set some local variables based on the value of atlas.env.

[kav]

I don't know that everything here works in Atlas but this is my reference for things to try: https://developer.hashicorp.com/terraform/language

I do know for conditionals ternaries work as described here:
https://developer.hashicorp.com/terraform/language/expressions/conditionals

I didn't seem to have access to atlas.env outside the atlas.hcl file in my testing but I'll admit it was pretty shallow

[MorganR]

Perfect, thanks! Had somehow not made the connection that this was the same HCL