VSCode extension to highlight SDLang (Simple Declarative Language)

Rewritten textmate grammar to support date, datetime, duration, and scopes

Much of this is based on the reference implementations

Original D Implementation Optimized D Implementation

• Complete Textmate highlighting for SDLang

The extension is published on the VSCode Marketplace here.

Issues with the grammar

• Names for some of the scopes might be odd; VSCode doesn't list the core scopes or provide a standard outside of linked Textmate docs, despite their use of other scopes in the core extensions such as entity.name.type.namespace.
• The default line comment is #, it's the most used out of the three options given
  • VSCode only gives one option in the language configuration for a line comment

Issues based on the standard:

• Anonymous namespace for a tagname prefixed with a colon :tagname should be allowed by the specification but is blocked by the D and Java implementations
• Anonymous tag children aren't supported without a prior value, this will show up non-highlighted but is marked with as an invalid token
  • This is otherwise known as "curly brace on newline"

"Value" {
  # Valid
}

/* No Value */ {
  # Invalid
}

• Does not support multiline and comments within timestamps, this shouldn't be allowed in the reference implementation
• The grammar for dates and times is very lax and permissive according to the reference implementation, I attempted to cover any given examples

The grammar was written in yaml, rather than json; this is converted using js-yaml and dropped into _build/syntaxes.

Dependencies can be installed with npm install. Currently this relies on GNU Make.

To build and test, press F5 within vscode to start the debugger and run another instance with the extension.

To package the extension, run make package if you have GNU Make installed. Otherwise, use the command located under package in the Makefile.