Rainbow Pascal

Rainbow Pascal is a VS Code extension that colors structurally matching Pascal keywords by nesting depth. It works alongside an existing Pascal language extension and currently decorates:

• begin and its matching end
• if, then, and the grammatically associated else

The parser ignores comments and strings, understands single-statement control flow, and keeps useful coloring while source code is incomplete during editing.

Development

npm install
npm test

Open this folder in VS Code and press F5 to launch an Extension Development Host. Open a document whose language ID is pascal, objectpascal, or delphi. The included samples/nested.pas file exercises nested compound and single-statement branches.

Rainbow Pascal reuses the active theme's six bracket-highlight colors by default. Run Rainbow Pascal: Choose Nesting Colors from the Command Palette to edit the palette with visual color controls. The Colors setting also links directly to this picker.

The underlying setting remains available for manual configuration:

{
  "rainbowPascal.colors": [
    "#E06C75",
    "#E5C07B",
    "#98C379",
    "#56B6C2",
    "#61AFEF",
    "#C678DD"
  ]
}

The setting accepts #RGB, #RGBA, #RRGGBB, and #RRGGBBAA. An empty array restores the theme colors. Disable the extension per workspace or resource with:

{
  "rainbowPascal.enabled": false
}

Current scope

The extension parses case, try, repeat, for, while, and with structures so nested if statements have correct boundaries, but it does not decorate those additional keywords yet. Compiler directives are ignored and conditional-compilation branches are not evaluated.