tree-sitter-hcl

tree-sitter grammar for the HCL language

Example

Highlighting example/example.hcl:

Developing

It is recommended to use nix to fulfill all development dependencies. To activate the development environment simply run nix-shell in the project root.

Running Tests

To run tests simply run nix-shell --run 'tree-sitter test'.

Quoted Template Expressions

In principle it is allowed to contain arbitary expressions in quoted template interpolations. Consider for example:

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.

Todo

• use Unicode® Standard Annex #31 (augmented with '-') for identifiers
• add template expressions
  • add quoted templates
    • add quoted template interpolations
    • add quoted template directives
  • add heredoc templates