ED-E is a templating language written in Haskell with a specific set of features:
- Logicless (within reason): A small set of consistent predicates and expressions for formatting and presentational logic are provided.
- Secure: No arbitrary code evaluation, with input data required to be fully specified at render time.
- Stateless: Parsing and rendering are separate steps so that loading, parsing, include resolution, and embedding of the compiled template can optionally be done ahead of time, amortising cost.
- Markup agnostic: ED-E is used to write out everything from configuration files for system services, to HTML and formatted emails.
- Control over purity: Users can choose pure or IO-based resolution of
includeexpressions. - No surprises: All parsing, type assurances, and rendering steps report helpful error messages with line/column metadata. Variable shadowing, unprintable expressions, implicit type coercion, and unbound variable access are all treated as errors errors.
Please see the documentation for more information.
A set of syntatic/semantic fragments for all supported expressions can be found in the tests or the documentation.
For any problems, comments or feedback please create an issue here on GitHub.
ED-E is released under the Mozilla Public License Version 2.0