Syntax highlighting for Porth (https://gitlab.com/tsoding/porth) in Sublime Text

Porth.sublime-syntax

%YAML 1.2
---
# See http://www.sublimetext.com/docs/syntax.html
name: Porth
scope: source.porth
file_extensions:
  - porth

variables:
  char_escape: '\\n|\\r|\\\\|\\"|\\'''

contexts:
  main:

    # Comments begin with a '//' and finish at the end of the line
    - match: '//'
      scope: punctuation.definition.comment.porth
      push: line_comment

    # Keywords.
    - match: '\b(if|else|while|do|include|memory|proc|const|end|offset|reset|assert|in|inline|here|addr-of|call-like)\b'
      scope: keyword.control.porth

    # Numbers
    - match: '(?:^|\s)[0-9]+(?:\s|$)'
      scope: constant.numeric.integer.porth

    # Character literal
    - match: (\')(?:({{char_escape}})|([^']))(\')
      scope: string.quoted.single.porth
      captures:
        1: punctuation.definition.string.begin.porth
        2: constant.character.escape.porth
        3: constant.character.literal.porth
        4: punctuation.definition.string.end.porth

    # Strings begin and end with quotes, and use backslashes as an escape character
    - match: '"'
      scope: punctuation.definition.string.begin.porth
      push: double_quoted_string

  line_comment:
    - meta_scope: comment.line.porth
    - match: $
      pop: true

  double_quoted_string:
    - meta_scope: string.quoted.double.porth
    - match: '"'
      scope: punctuation.definition.string.end.porth
      pop: true
    - match: ({{char_escape}})
      scope: constant.character.escape.porth