SE Language for Visual Studio Code

Official VS Code support files for SE source code (.se).

Features

.se file recognition as SE
TextMate syntax highlighting for comments, strings, escapes, integers, floating-point values and duration literals
highlighting for SE control flow: if, else, for, while, repeat, match, case, try
highlighting for declarations: make, type, use, function names, type names and generic parameters
highlighting for core types such as Int, Num, Text, Bool, Bytes, List, Map, Set, Option, Result and Task
highlighting for conversion builtins such as int, string, double, float, char and related aliases
highlighting for standard modules including math, random, json, collections, async, db, https, web and others
operators, member access and type annotations
indentation support for SE blocks
snippets for common SE constructs
prefix IntelliSense: typing h, ma, rep, etc. immediately narrows SE keyword/module suggestions
local symbol completion for functions, user types and variables defined in the current .se file
member completion after . for supported SE modules such as http., https., json., db., collections., option., result., async. and function.
inferred member completion for common values such as Text/List and for user-defined types
user-type field and method completion, e.g. player. can suggest fields and methods from type Player
hover information for SE builtins, functions, variables and user-defined types
Go to Definition for local functions, variables and types
Find References within the current SE file
Outline / Breadcrumb document symbols for types, fields, methods, functions and variables
low-punctuation function signature help while entering arguments
SE: Run File, SE: Check File, and SE: Build File commands
configurable SE executable path

IntelliSense examples

Typing a prefix:

can suggest SE words such as html, http, and https. VS Code performs the prefix filtering while the SE extension supplies the language-aware candidate set.

Module members:

use collections

collections.

can suggest helpers such as filter, map, reduce, slice, take, drop, and sorting operations.

User-defined type members:

type Player
    name = ""
    hp = 100

    make hit damage
        hp -= damage

player = Player
player.

can suggest name, hp, and hit based on the type declared in the file.

The current IntelliSense implementation is intentionally lightweight and runs directly inside the extension. It understands common SE declarations and simple local type inference without requiring a separate language-server process. A future full LSP can reuse the compiler/parser/type-checker for cross-file semantic analysis while preserving this editor experience.

Local installation

From the repository root:

cd vscode
npm install
npx vsce package

This creates:

se-language-0.6.0.vsix

Install it with:

code --install-extension se-language-0.6.0.vsix

Or use Extensions → ... → Install from VSIX... inside VS Code.

The extension expects the se command to be available in your PATH. If SE is installed somewhere else, set SE: Executable Path in VS Code settings.

Commands

Open any .se file and use the Command Palette:

SE: Run File
SE: Check File
SE: Build File

Run is also available with Cmd+F5 on macOS or Ctrl+F5 on Windows/Linux. Check uses Cmd+Shift+F5 or Ctrl+Shift+F5.

Grammar

The grammar is stored at:

vscode/syntaxes/se.tmLanguage.json

Its TextMate scope is:

source.se

This grammar is intentionally written as a normal TextMate-compatible grammar so it can also serve as the upstream grammar source when SE becomes eligible for GitHub Linguist language recognition.

SE Language