Struct Config 

pub struct Config { /* private fields */ }

Configuration instance that provides access to cached configuration values

Each Config instance is associated with a specific configuration file and provides type-safe access to its values.

Implementations

impl Config

pub fn new(name: &str) -> Self

Creates or retrieves a cached configuration instance

The configuration is loaded from configs/{name}.json. The file is parsed only once and then cached for subsequent accesses.

Arguments

• name - Name of the configuration file (without extension)

Panics

• If the configuration file doesn’t exist in configs/ directory
• If the file contains invalid JSON

Examples

use config_ro::Config;
let config = Config::new("app_settings");

pub fn get<T: DeserializeOwned>(&self, path: &str) -> Option<T>

Retrieves a configuration value by its path, supporting nested structures

Uses dot notation to access nested values (e.g., “database.connection.port”). The value is automatically deserialized to the requested type.

Arguments

• path - Dot-separated path to the configuration value

Returns

Some(T) if the value exists and can be deserialized, None otherwise

Examples

use config_ro::Config;
let config = Config::new("app");

// Flat structure
let timeout: u32 = config.get("timeout").unwrap();

// Nested structure
let db_port: u16 = config.get("database.connection.port").unwrap();

// Optional values
let retry_count: Option<u8> = config.get("retries.count");