Mod settings

Use mod_settings! in a settings-stage module to define startup or runtime settings. The macro expands to:

• a Settings type with pub const name strings
• pub fn register() that extends Factorio data with setting prototypes

use factorio_rs::prelude::*;

factorio_rs::mod_settings! {
    prefix = "msr",

    startup {
        casual_mode: bool = false,
        adjacency_enabled: bool = true,
    }

    // runtime_global { ... }
    // runtime_per_user { ... }
}

Naming

Rust field	Const	Factorio setting name
casual_mode	Settings::CASUAL_MODE	msr-casual-mode (with prefix = "msr")

Stage keywords use underscores (runtime_global). Generated Lua uses Factorio’s hyphenated strings ("runtime-global").

Types

Rust type	Prototype
bool	bool-setting
integer types (i32, u64, …)	int-setting
f32 / f64	double-setting
&str / String	string-setting

Reading in control

use factorio_rs::prelude::*;
use crate::settings::Settings;

const CASUAL_MODE: bool = settings.startup.get::<bool>(Settings::CASUAL_MODE);

Put locale strings for setting names/descriptions in a locale! block - see Locale.

Reading values in Lua terms

settings.startup.get::<bool>(Settings::CASUAL_MODE)

lowers roughly to settings.startup["msr-casual-mode"].value.

Setting / API structs often use ..Default::default() so only the fields you set appear in the Lua table - see Language support.