Trait ParsableConfigValue

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pub trait ParsableConfigValue: Debug + Sized {
    // Required methods
    fn parse_user_value(value: &str) -> Option<Self>;
    fn to_config_string(&self) -> String;

    // Provided methods
    fn try_update_in_place(&mut self, value: &str) -> bool { ... }
    fn parse_config_value(
        variable_name: &str,
        value: Option<String>,
        default: Self,
    ) -> Self { ... }
}

Expand description

A trait to control how a value is parsed from an environment string or other config source if it’s present. Also provides serialization back to a string representation that roundtrips with parse_user_value.

Required Methods§

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fn parse_user_value(value: &str) -> Option<Self>

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fn to_config_string(&self) -> String

Serialize this value to a string that can be parsed back via parse_user_value.

Provided Methods§

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fn try_update_in_place(&mut self, value: &str) -> bool

Try to update this value in place from a string. Returns true on success. The default implementation delegates to parse_user_value, but types like ConfigEnum override this to use context-aware validation.

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