Reference

The complete Munos surface, organized for lookup. If you're new, the Learn path teaches these pieces in order with a worked example; this section is for when you know what you're after and want the exact rule or signature.

Language

The syntax and semantics of the language itself.

• Syntax & structure — program layout, statements, line rules, comments.
• Types — the primitive types, image, client, palettes, literals, and conversions.
• Variables & constants — var, const, scope, shadowing.
• Operators — arithmetic, comparison, logical, bitwise, and precedence.
• Arrays — declaration, indexing, and the len / size / push / pop / copy forms.
• Structs — composite types.
• Control flow — if, while, for, break, continue.
• Functions — parameters, defaults, named arguments, hoisting.
• Events — the runtime-invoked handlers.
• Client & server — on client / on server and shared code.

Builtins

Functions and events the runtime provides. The full list is grouped by job:

• Memory — read_* / write_*.
• Images & drawing — image construction and drawImage.
• Networking & packing — send, receive, pack, unpack, byte helpers.
• Input — gamepad polling and edge events.
• ROM control — pause/resume, ROM identity, disconnect.
• Server & slots — slots, ticks, connection events, hopping.
• Instances — spawning and instance-to-instance messaging.
• Persistence — the key/value store.
• Fetch — outbound HTTP from a client.
• Misc — print, len, casts, byte helpers.

Appendix

• Cheat sheet — the whole language on one page.
• Buttons & palette — the predefined constants.

Source of truth

This reference is written against the Munos compiler in packages/munos. The builtin signatures come from packages/munos/src/types/builtins.ts, which is the single source of truth the type-checker and code generator both consult.