It is recommended to use `nix` to fulfill all development dependencies. To activate the development environment simply run `nix-shell` in the project root.
In principle it is allowed to contain arbitary expressions in quoted template expressions.
Consider for example:
```hcl
foo = "prefix-${func(\"bar\"}"
```
To make parsing a little easier, this parser only checks for valid escape sequences and template chars.
When using this parser one would have to take the content of a template interpolation, unescape it and parse it again to get the syntax tree. The same applies to template directives.
## String Literals
String literals are parsed as quoted templates. The calling application should check if the node contains any template interpolations or directives.
## Todo
* use [Unicode® Standard Annex #31](https://www.unicode.org/reports/tr31/) (augmented with '-') for identifiers
