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MudEngine Part 3: File-Based World Loading

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Add dependencies

Rust does not include TOML parsing in the standard library. We need two crates:

  • serde — a framework for serializing and deserializing Rust data structures
  • toml — a TOML parser that works with serde

Add them to Cargo.toml in the mud-engine-repl project.

mud-engine-repl/Cargo.toml
[package]
name = "mud-engine-repl"
version = "0.1.0"
edition = "2021"

[dependencies]
serde = { version = "1", features = ["derive"] }
toml = "0.8"
💡 serde derives

The features = ["derive"] flag enables the #[derive(Deserialize)] macro. Without it you would have to implement the deserialization trait manually.

toml = "0.8" is the latest major version as of 2025. It works with both serde's Deserialize and Serialize traits.

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